Move header offset calculation to private values

The interface creation on macOS seems to be asynchronus why the tun.create methode somethimes failes becasue the interface is not ready yet. To work around this issue we introduce a retry on tun.create

.editorconfig

@@ -0,0 +1,8 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.go]
+indent_style = tab

.github/ISSUE_TEMPLATE/bug-issue-report.md

@@ -2,15 +2,17 @@
 name: Bug/Issue report
 about: Create a report to help us improve
 title: ''
-labels: ''
+labels: ['triage-needed']
 assignees: ''
 
 ---
 
 **Describe the problem**
+
 A clear and concise description of what the problem is.
 
 **To Reproduce**
+
 Steps to reproduce the behavior:
 1. Go to '...'
 2. Click on '....'
@@ -18,13 +20,30 @@ Steps to reproduce the behavior:
 4. See error
 
 **Expected behavior**
+
 A clear and concise description of what you expected to happen.
 
-**NetBird status -d output:**
-If applicable, add the output of the `netbird status -d` command
+**Are you using NetBird Cloud?**
+
+Please specify whether you use NetBird Cloud or self-host NetBird's control plane.
+
+**NetBird version**
+
+`netbird version`
+
+**NetBird status -dA output:**
+
+If applicable, add the `netbird status -dA' command output.
+
+**Do you face any (non-mobile) client issues?**
+
+Please provide the file created by `netbird debug for 1m -AS`.
+We advise reviewing the anonymized files for any remaining PII.
 
 **Screenshots**
+
 If applicable, add screenshots to help explain your problem.
 
 **Additional context**
+
 Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,7 +2,7 @@
 name: Feature request
 about: Suggest an idea for this project
 title: ''
-labels: ''
+labels: ['feature-request']
 assignees: ''
 
 ---

.github/workflows/golang-test-darwin.yml

@@ -14,7 +14,7 @@ jobs:
   test:
     strategy:
       matrix:
-        store: ['jsonfile', 'sqlite']
+        store: ['sqlite']
     runs-on: macos-latest
     steps:
       - name: Install Go
@@ -32,8 +32,14 @@ jobs:
           restore-keys: |
             macos-go-
 
+      - name: Install libpcap
+        run: brew install libpcap
+
       - name: Install modules
         run: go mod tidy
 
+      - name: check git status
+        run: git --no-pager diff --exit-code
+
       - name: Test
-        run: NETBIRD_STORE_ENGINE=${{ matrix.store }} go test -exec 'sudo --preserve-env=CI' -timeout 5m -p 1 ./...
+        run: NETBIRD_STORE_ENGINE=${{ matrix.store }} go test -exec 'sudo --preserve-env=CI,NETBIRD_STORE_ENGINE' -timeout 5m -p 1 ./...

.github/workflows/golang-test-freebsd.yml

@@ -0,0 +1,46 @@
+
+name: Test Code FreeBSD
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref || github.actor_id }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - name: Test in FreeBSD
+        id: test
+        uses: vmactions/freebsd-vm@v1
+        with:
+          usesh: true
+          copyback: false
+          release: "14.1"
+          prepare: |
+            pkg install -y go
+
+          # -x - to print all executed commands
+          # -e - to faile on first error
+          run: |
+            set -e -x
+            time go build -o netbird client/main.go
+            # check all component except management, since we do not support management server on freebsd
+            time go test -timeout 1m -failfast ./base62/...
+            # NOTE: without -p1 `client/internal/dns` will fail becasue of `listen udp4 :33100: bind: address already in use`
+            time go test -timeout 8m -failfast -p 1 ./client/...
+            time go test -timeout 1m -failfast ./dns/...
+            time go test -timeout 1m -failfast ./encryption/...
+            time go test -timeout 1m -failfast ./formatter/...
+            time go test -timeout 1m -failfast ./iface/...
+            time go test -timeout 1m -failfast ./route/...
+            time go test -timeout 1m -failfast ./sharedsock/...
+            time go test -timeout 1m -failfast ./signal/...
+            time go test -timeout 1m -failfast ./util/...
+            time go test -timeout 1m -failfast ./version/...

.github/workflows/golang-test-linux.yml

@@ -14,8 +14,8 @@ jobs:
   test:
     strategy:
       matrix:
-        arch: ['386','amd64']
-        store: ['jsonfile', 'sqlite']
+        arch: [ '386','amd64' ]
+        store: [ 'sqlite', 'postgres']
     runs-on: ubuntu-latest
     steps:
       - name: Install Go
@@ -36,13 +36,20 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install dependencies
-        run: sudo apt update && sudo apt install -y -q libgtk-3-dev libayatana-appindicator3-dev libgl1-mesa-dev xorg-dev gcc-multilib
+        run: sudo apt update && sudo apt install -y -q libgtk-3-dev libayatana-appindicator3-dev libgl1-mesa-dev xorg-dev gcc-multilib libpcap-dev
+
+      - name: Install 32-bit libpcap
+        if: matrix.arch == '386'
+        run: sudo dpkg --add-architecture i386 && sudo apt update && sudo apt-get install -y libpcap0.8-dev:i386
 
       - name: Install modules
         run: go mod tidy
 
+      - name: check git status
+        run: git --no-pager diff --exit-code
+
       - name: Test
-        run: CGO_ENABLED=1 GOARCH=${{ matrix.arch }} NETBIRD_STORE_ENGINE=${{ matrix.store }} go test -exec 'sudo --preserve-env=CI' -timeout 5m -p 1 ./...
+        run: CGO_ENABLED=1 GOARCH=${{ matrix.arch }} NETBIRD_STORE_ENGINE=${{ matrix.store }} go test -exec 'sudo --preserve-env=CI,NETBIRD_STORE_ENGINE' -timeout 5m -p 1 ./...
 
   test_client_on_docker:
     runs-on: ubuntu-20.04
@@ -64,11 +71,14 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install dependencies
-        run: sudo apt update && sudo apt install -y -q libgtk-3-dev libayatana-appindicator3-dev libgl1-mesa-dev xorg-dev gcc-multilib
+        run: sudo apt update && sudo apt install -y -q libgtk-3-dev libayatana-appindicator3-dev libgl1-mesa-dev xorg-dev gcc-multilib libpcap-dev
 
       - name: Install modules
         run: go mod tidy
 
+      - name: check git status
+        run: git --no-pager diff --exit-code
+
       - name: Generate Iface Test bin
         run: CGO_ENABLED=0 go test -c -o iface-testing.bin ./iface/
 
@@ -76,7 +86,10 @@ jobs:
         run: CGO_ENABLED=0 go test -c -o sharedsock-testing.bin ./sharedsock
 
       - name: Generate RouteManager Test bin
-        run: CGO_ENABLED=0 go test -c -o routemanager-testing.bin ./client/internal/routemanager/...
+        run: CGO_ENABLED=0 go test -c -o routemanager-testing.bin  ./client/internal/routemanager
+
+      - name: Generate SystemOps Test bin
+        run: CGO_ENABLED=1 go test -c -o systemops-testing.bin -tags netgo -ldflags '-w -extldflags "-static -ldbus-1 -lpcap"' ./client/internal/routemanager/systemops
 
       - name: Generate nftables Manager Test bin
         run: CGO_ENABLED=0 go test -c -o nftablesmanager-testing.bin ./client/firewall/nftables/...
@@ -98,12 +111,15 @@ jobs:
       - name: Run RouteManager tests in docker
         run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/internal/routemanager --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/routemanager-testing.bin  -test.timeout 5m -test.parallel 1
 
+      - name: Run SystemOps tests in docker
+        run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/internal/routemanager/systemops --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/systemops-testing.bin  -test.timeout 5m -test.parallel 1
+
       - name: Run nftables Manager tests in docker
         run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/firewall --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/nftablesmanager-testing.bin  -test.timeout 5m -test.parallel 1
 
       - name: Run Engine tests in docker with file store
         run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/internal -e NETBIRD_STORE_ENGINE="jsonfile" --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/engine-testing.bin  -test.timeout 5m -test.parallel 1
-      
+
       - name: Run Engine tests in docker with sqlite store
         run: docker run -t --cap-add=NET_ADMIN --privileged --rm -v $PWD:/ci -w /ci/client/internal -e NETBIRD_STORE_ENGINE="sqlite" --entrypoint /busybox/sh gcr.io/distroless/base:debug -c /ci/engine-testing.bin  -test.timeout 5m -test.parallel 1
 

.github/workflows/golang-test-windows.yml

@@ -46,7 +46,7 @@ jobs:
       - run: PsExec64 -s -w ${{ github.workspace }} C:\hostedtoolcache\windows\go\${{ steps.go.outputs.go-version }}\x64\bin\go.exe env -w GOCACHE=C:\Users\runneradmin\AppData\Local\go-build
 
       - name: test
-        run: PsExec64 -s -w ${{ github.workspace }} cmd.exe /c "C:\hostedtoolcache\windows\go\${{ steps.go.outputs.go-version }}\x64\bin\go.exe test -timeout 5m -p 1 ./... > test-out.txt 2>&1"
+        run: PsExec64 -s -w ${{ github.workspace }} cmd.exe /c "C:\hostedtoolcache\windows\go\${{ steps.go.outputs.go-version }}\x64\bin\go.exe test -timeout 10m -p 1 ./... > test-out.txt 2>&1"
       - name: test output
         if: ${{ always() }}
         run: Get-Content test-out.txt

.github/workflows/golangci-lint.yml

@@ -19,7 +19,7 @@ jobs:
       - name: codespell
         uses: codespell-project/actions-codespell@v2
         with:
-          ignore_words_list: erro,clienta
+          ignore_words_list: erro,clienta,hastable,
           skip: go.mod,go.sum
           only_warn: 1
   golangci:
@@ -33,6 +33,10 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
+      - name: Check for duplicate constants
+        if: matrix.os == 'ubuntu-latest'
+        run: |
+          ! awk '/const \(/,/)/{print $0}' management/server/activity/codes.go | grep -o '= [0-9]*' | sort | uniq -d | grep .
       - name: Install Go
         uses: actions/setup-go@v4
         with:
@@ -40,7 +44,7 @@ jobs:
           cache: false
       - name: Install dependencies
         if: matrix.os == 'ubuntu-latest'
-        run: sudo apt update && sudo apt install -y -q libgtk-3-dev libayatana-appindicator3-dev libgl1-mesa-dev xorg-dev
+        run: sudo apt update && sudo apt install -y -q libgtk-3-dev libayatana-appindicator3-dev libgl1-mesa-dev xorg-dev libpcap-dev
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with:

.github/workflows/mobile-build-validation.yml

@@ -11,7 +11,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  andrloid_build:
+  android_build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
@@ -38,10 +38,10 @@ jobs:
       - name: Setup NDK
         run: /usr/local/lib/android/sdk/cmdline-tools/7.0/bin/sdkmanager --install "ndk;23.1.7779620"
       - name: install gomobile
-        run: go install golang.org/x/mobile/cmd/gomobile@v0.0.0-20230531173138-3c911d8e3eda
+        run: go install golang.org/x/mobile/cmd/gomobile@v0.0.0-20240404231514-09dbf07665ed
       - name: gomobile init
         run: gomobile init
-      - name: build android nebtird lib
+      - name: build android netbird lib
         run: PATH=$PATH:$(go env GOPATH) gomobile bind -o $GITHUB_WORKSPACE/netbird.aar -javapkg=io.netbird.gomobile -ldflags="-X golang.zx2c4.com/wireguard/ipc.socketDirectory=/data/data/io.netbird.client/cache/wireguard -X github.com/netbirdio/netbird/version.version=buildtest"  $GITHUB_WORKSPACE/client/android
         env:
           CGO_ENABLED: 0
@@ -56,10 +56,10 @@ jobs:
         with:
           go-version: "1.21.x"
       - name: install gomobile
-        run: go install golang.org/x/mobile/cmd/gomobile@v0.0.0-20230531173138-3c911d8e3eda
+        run: go install golang.org/x/mobile/cmd/gomobile@v0.0.0-20240404231514-09dbf07665ed
       - name: gomobile init
         run: gomobile init
-      - name: build iOS nebtird lib
-        run: PATH=$PATH:$(go env GOPATH) gomobile bind -target=ios -bundleid=io.netbird.framework -ldflags="-X github.com/netbirdio/netbird/version.version=buildtest" -o $GITHUB_WORKSPACE/NetBirdSDK.xcframework $GITHUB_WORKSPACE/client/ios/NetBirdSDK
+      - name: build iOS netbird lib
+        run: PATH=$PATH:$(go env GOPATH) gomobile bind -target=ios -bundleid=io.netbird.framework -ldflags="-X github.com/netbirdio/netbird/version.version=buildtest" -o ./NetBirdSDK.xcframework ./client/ios/NetBirdSDK
         env:
           CGO_ENABLED: 0

.github/workflows/release.yml

@@ -7,21 +7,13 @@ on:
     branches:
       - main
   pull_request:
-    paths:
-      - 'go.mod'
-      - 'go.sum'
-      - '.goreleaser.yml'
-      - '.goreleaser_ui.yaml'
-      - '.goreleaser_ui_darwin.yaml'
-      - '.github/workflows/release.yml'
-      - 'release_files/**'
-      - '**/Dockerfile'
-      - '**/Dockerfile.*'
-      - 'client/ui/**'
+
 
 env:
-  SIGN_PIPE_VER: "v0.0.11"
+  SIGN_PIPE_VER: "v0.0.14"
   GORELEASER_VER: "v1.14.1"
+  PRODUCT_NAME: "NetBird"
+  COPYRIGHT: "Wiretrustee UG (haftungsbeschreankt)"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref || github.actor_id }}
@@ -33,6 +25,13 @@ jobs:
     env:
       flags: ""
     steps:
+      - name: Parse semver string
+        id: semver_parser
+        uses: booxmedialtd/ws-action-parse-semver@v1
+        with:
+          input_string: ${{ (startsWith(github.ref, 'refs/tags/v') && github.ref) || 'refs/tags/v0.0.0' }}
+          version_extractor_regex: '\/v(.*)$'
+
       - if: ${{ !startsWith(github.ref, 'refs/tags/v') }}
         run: echo "flags=--snapshot" >> $GITHUB_ENV
       -
@@ -78,18 +77,11 @@ jobs:
       - name: Install OS build dependencies
         run: sudo apt update && sudo apt install -y -q gcc-arm-linux-gnueabihf gcc-aarch64-linux-gnu
 
-      - name: Install rsrc
-        run: go install github.com/akavel/rsrc@v0.10.2
-      - name: Generate windows rsrc amd64
-        run: rsrc -arch amd64 -ico client/ui/netbird.ico -manifest client/manifest.xml -o client/resources_windows_amd64.syso
-      - name: Generate windows rsrc arm64
-        run: rsrc -arch arm64 -ico client/ui/netbird.ico -manifest client/manifest.xml -o client/resources_windows_arm64.syso
-      - name: Generate windows rsrc arm
-        run: rsrc -arch arm -ico client/ui/netbird.ico -manifest client/manifest.xml -o client/resources_windows_arm.syso
-      - name: Generate windows rsrc 386
-        run: rsrc -arch 386 -ico client/ui/netbird.ico -manifest client/manifest.xml -o client/resources_windows_386.syso
-      -
-        name: Run GoReleaser
+      - name: Install goversioninfo
+        run: go install github.com/josephspurrier/goversioninfo/cmd/goversioninfo@233067e
+      - name: Generate windows syso amd64
+        run: goversioninfo  -icon client/ui/netbird.ico -manifest client/manifest.xml -product-name ${{ env.PRODUCT_NAME }} -copyright "${{ env.COPYRIGHT }}" -ver-major ${{ steps.semver_parser.outputs.major }} -ver-minor ${{ steps.semver_parser.outputs.minor }} -ver-patch ${{ steps.semver_parser.outputs.patch }} -ver-build 0 -file-version ${{ steps.semver_parser.outputs.fullversion }}.0 -product-version ${{ steps.semver_parser.outputs.fullversion }}.0 -o client/resources_windows_amd64.syso
+      - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v4
         with:
           version: ${{ env.GORELEASER_VER }}
@@ -106,10 +98,38 @@ jobs:
           name: release
           path: dist/
           retention-days: 3
+      -
+        name: upload linux packages
+        uses: actions/upload-artifact@v3
+        with:
+          name: linux-packages
+          path: dist/netbird_linux**
+          retention-days: 3
+      -
+        name: upload windows packages
+        uses: actions/upload-artifact@v3
+        with:
+          name: windows-packages
+          path: dist/netbird_windows**
+          retention-days: 3
+      -
+        name: upload macos packages
+        uses: actions/upload-artifact@v3
+        with:
+          name: macos-packages
+          path: dist/netbird_darwin**
+          retention-days: 3
 
   release_ui:
     runs-on: ubuntu-latest
     steps:
+      - name: Parse semver string
+        id: semver_parser
+        uses: booxmedialtd/ws-action-parse-semver@v1
+        with:
+          input_string: ${{ (startsWith(github.ref, 'refs/tags/v') && github.ref) || 'refs/tags/v0.0.0' }}
+          version_extractor_regex: '\/v(.*)$'
+
       - if: ${{ !startsWith(github.ref, 'refs/tags/v') }}
         run: echo "flags=--snapshot" >> $GITHUB_ENV
       - name: Checkout
@@ -140,10 +160,11 @@ jobs:
 
       - name: Install dependencies
         run: sudo apt update && sudo apt install -y -q libappindicator3-dev gir1.2-appindicator3-0.1 libxxf86vm-dev gcc-mingw-w64-x86-64
-      - name: Install rsrc
-        run: go install github.com/akavel/rsrc@v0.10.2
-      - name: Generate windows rsrc
-        run: rsrc -arch amd64 -ico client/ui/netbird.ico -manifest client/ui/manifest.xml -o client/ui/resources_windows_amd64.syso
+      - name: Install goversioninfo
+        run: go install github.com/josephspurrier/goversioninfo/cmd/goversioninfo@233067e
+      - name: Generate windows syso amd64
+        run: goversioninfo -64 -icon client/ui/netbird.ico -manifest client/ui/manifest.xml -product-name ${{ env.PRODUCT_NAME }}-"UI" -copyright "${{ env.COPYRIGHT }}" -ver-major ${{ steps.semver_parser.outputs.major }} -ver-minor ${{ steps.semver_parser.outputs.minor }} -ver-patch ${{ steps.semver_parser.outputs.patch }} -ver-build 0 -file-version ${{ steps.semver_parser.outputs.fullversion }}.0 -product-version ${{ steps.semver_parser.outputs.fullversion }}.0 -o client/ui/resources_windows_amd64.syso
+
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v4
         with:
@@ -162,7 +183,7 @@ jobs:
           retention-days: 3
 
   release_ui_darwin:
-    runs-on: macos-11
+    runs-on: macos-latest
     steps:
       - if: ${{ !startsWith(github.ref, 'refs/tags/v') }}
         run: echo "flags=--snapshot" >> $GITHUB_ENV
@@ -190,6 +211,9 @@ jobs:
       -
         name: Install modules
         run: go mod tidy
+      - 
+        name: check git status
+        run: git --no-pager diff --exit-code
       -
         name: Run GoReleaser
         id: goreleaser
@@ -207,29 +231,15 @@ jobs:
           path: dist/
           retention-days: 3
 
-  trigger_windows_signer:
+  trigger_signer:
     runs-on: ubuntu-latest
-    needs: [release,release_ui]
+    needs: [release,release_ui,release_ui_darwin]
     if: startsWith(github.ref, 'refs/tags/')
     steps:
-      - name: Trigger Windows binaries sign pipeline
+      - name: Trigger binaries sign pipelines
         uses: benc-uk/workflow-dispatch@v1
         with:
-          workflow: Sign windows bin and installer
-          repo: netbirdio/sign-pipelines
-          ref: ${{ env.SIGN_PIPE_VER }}
-          token: ${{ secrets.SIGN_GITHUB_TOKEN }}
-          inputs: '{ "tag": "${{ github.ref }}" }'
-
-  trigger_darwin_signer:
-    runs-on: ubuntu-latest
-    needs: [release,release_ui_darwin]
-    if: startsWith(github.ref, 'refs/tags/')
-    steps:
-      - name: Trigger Darwin App binaries sign pipeline
-        uses: benc-uk/workflow-dispatch@v1
-        with:
-          workflow: Sign darwin ui app with dispatch
+          workflow: Sign bin and installer
           repo: netbirdio/sign-pipelines
           ref: ${{ env.SIGN_PIPE_VER }}
           token: ${{ secrets.SIGN_GITHUB_TOKEN }}

.github/workflows/test-infrastructure-files.yml

@@ -18,7 +18,31 @@ concurrency:
 jobs:
   test-docker-compose:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        store: [ 'sqlite', 'postgres' ]
+    services:
+      postgres:
+        image: ${{ (matrix.store == 'postgres') && 'postgres' || '' }}
+        env:
+          POSTGRES_USER: netbird
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: netbird
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+        ports:
+          - 5432:5432
     steps:
+      - name: Set Database Connection String
+        run: |
+          if [ "${{ matrix.store }}" == "postgres" ]; then
+            echo "NETBIRD_STORE_ENGINE_POSTGRES_DSN=host=$(hostname -I | awk '{print $1}') user=netbird password=postgres dbname=netbird port=5432" >> $GITHUB_ENV
+          else
+            echo "NETBIRD_STORE_ENGINE_POSTGRES_DSN==" >> $GITHUB_ENV
+          fi
+
       - name: Install jq
         run: sudo apt-get install -y jq
 
@@ -58,7 +82,8 @@ jobs:
           CI_NETBIRD_IDP_MGMT_CLIENT_ID: testing.client.id
           CI_NETBIRD_IDP_MGMT_CLIENT_SECRET: testing.client.secret
           CI_NETBIRD_AUTH_SUPPORTED_SCOPES: "openid profile email offline_access api email_verified"
-          CI_NETBIRD_STORE_CONFIG_ENGINE: "sqlite"
+          CI_NETBIRD_STORE_CONFIG_ENGINE: ${{ matrix.store }}
+          NETBIRD_STORE_ENGINE_POSTGRES_DSN: ${{ env.NETBIRD_STORE_ENGINE_POSTGRES_DSN }}
           CI_NETBIRD_MGMT_IDP_SIGNKEY_REFRESH: false
 
       - name: check values
@@ -85,7 +110,8 @@ jobs:
           CI_NETBIRD_IDP_MGMT_CLIENT_ID: testing.client.id
           CI_NETBIRD_IDP_MGMT_CLIENT_SECRET: testing.client.secret
           CI_NETBIRD_SIGNAL_PORT: 12345
-          CI_NETBIRD_STORE_CONFIG_ENGINE: "sqlite"
+          CI_NETBIRD_STORE_CONFIG_ENGINE: ${{ matrix.store }}
+          NETBIRD_STORE_ENGINE_POSTGRES_DSN: '${{ env.NETBIRD_STORE_ENGINE_POSTGRES_DSN }}$'
           CI_NETBIRD_MGMT_IDP_SIGNKEY_REFRESH: false
           CI_NETBIRD_TURN_EXTERNAL_IP: "1.2.3.4"
 
@@ -123,10 +149,21 @@ jobs:
           grep -A 10 PKCEAuthorizationFlow management.json | grep -A 10 ProviderConfig | grep Scope | grep "$CI_NETBIRD_AUTH_SUPPORTED_SCOPES"
           grep -A 10 PKCEAuthorizationFlow management.json | grep -A 10 ProviderConfig | grep -A 3 RedirectURLs | grep "http://localhost:53000"
           grep "external-ip" turnserver.conf | grep $CI_NETBIRD_TURN_EXTERNAL_IP
+          grep NETBIRD_STORE_ENGINE_POSTGRES_DSN docker-compose.yml | egrep "$NETBIRD_STORE_ENGINE_POSTGRES_DSN"
+          # check relay values
+          grep "NB_EXPOSED_ADDRESS=$CI_NETBIRD_DOMAIN:33445" docker-compose.yml
+          grep "NB_LISTEN_ADDRESS=:33445" docker-compose.yml
+          grep '33445:33445' docker-compose.yml
+          grep -A 10 'relay:' docker-compose.yml | egrep 'NB_AUTH_SECRET=.+$'
+          grep -A 7 Relay management.json | grep "rel://$CI_NETBIRD_DOMAIN:33445"
+          grep -A 7 Relay management.json | egrep '"Secret": ".+"'
 
       - name: Install modules
         run: go mod tidy
 
+      - name: check git status
+        run: git --no-pager diff --exit-code
+
       - name: Build management binary
         working-directory: management
         run: CGO_ENABLED=1 go build -o netbird-mgmt main.go
@@ -145,20 +182,36 @@ jobs:
         run: |
           docker build -t netbirdio/signal:latest .
 
+      - name: Build relay binary
+        working-directory: relay
+        run: CGO_ENABLED=0 go build -o netbird-relay main.go
+
+      - name: Build relay docker image
+        working-directory: relay
+        run: |
+          docker build -t netbirdio/relay:latest .
+
       - name: run docker compose up
         working-directory: infrastructure_files/artifacts
         run: |
-          docker-compose up -d
+          docker compose up -d
           sleep 5
-          docker-compose ps
-          docker-compose logs --tail=20
+          docker compose ps
+          docker compose logs --tail=20
 
       - name: test running containers
         run: |
           count=$(docker compose ps --format json | jq '. | select(.Name | contains("artifacts")) | .State' | grep -c running)
-          test $count -eq 4
+          test $count -eq 5 || docker compose logs
         working-directory: infrastructure_files/artifacts
 
+      - name: test geolocation databases
+        working-directory: infrastructure_files/artifacts
+        run: |
+          sleep 30
+          docker compose exec management ls -l /var/lib/netbird/ | grep -i GeoLite2-City_[0-9]*.mmdb
+          docker compose exec management ls -l /var/lib/netbird/ | grep -i geonames_[0-9]*.db
+
   test-getting-started-script:
     runs-on: ubuntu-latest
     steps:
@@ -168,21 +221,73 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v3
 
-      - name: run script
+      - name: handle insisting image   # remove after release
+        run: docker pull netbirdio/relay:latest || docker pull netbirdio/signal:latest && docker tag netbirdio/signal:latest netbirdio/relay:latest
+
+      - name: run script with Zitadel PostgreSQL
         run: NETBIRD_DOMAIN=use-ip bash -x infrastructure_files/getting-started-with-zitadel.sh
 
-      - name: test Caddy file gen
+      - name: test Caddy file gen postgres
         run: test -f Caddyfile
-      - name: test docker-compose file gen
+
+      - name: test docker-compose file gen postgres
         run: test -f docker-compose.yml
-      - name: test management.json file gen
+
+      - name: test management.json file gen postgres
         run: test -f management.json
-      - name: test turnserver.conf file gen
-        run: | 
+
+      - name: test turnserver.conf file gen postgres
+        run: |
           set -x
           test -f turnserver.conf
           grep external-ip turnserver.conf
-      - name: test zitadel.env file gen
+
+      - name: test zitadel.env file gen postgres
         run: test -f zitadel.env
-      - name: test dashboard.env file gen
+
+      - name: test dashboard.env file gen postgres
         run: test -f dashboard.env
+
+      - name: test relay.env file gen postgres
+        run: test -f relay.env
+
+      - name: test zdb.env file gen postgres
+        run: test -f zdb.env
+
+      - name: Postgres run cleanup
+        run: |
+          docker compose down --volumes --rmi all
+          rm -rf docker-compose.yml Caddyfile zitadel.env dashboard.env machinekey/zitadel-admin-sa.token turnserver.conf management.json zdb.env
+
+      - name: handle insisting image  gen CockroachDB # remove after release
+        run: docker pull netbirdio/relay:latest || docker pull netbirdio/signal:latest && docker tag netbirdio/signal:latest netbirdio/relay:latest
+
+      - name: run script with Zitadel CockroachDB
+        run: bash -x infrastructure_files/getting-started-with-zitadel.sh
+        env:
+          NETBIRD_DOMAIN: use-ip
+          ZITADEL_DATABASE: cockroach
+
+      - name: test Caddy file gen CockroachDB
+        run: test -f Caddyfile
+
+      - name: test docker-compose file gen CockroachDB
+        run: test -f docker-compose.yml
+
+      - name: test management.json file gen CockroachDB
+        run: test -f management.json
+
+      - name: test turnserver.conf file gen CockroachDB
+        run: |
+          set -x
+          test -f turnserver.conf
+          grep external-ip turnserver.conf
+
+      - name: test zitadel.env file gen CockroachDB
+        run: test -f zitadel.env
+
+      - name: test dashboard.env file gen CockroachDB
+        run: test -f dashboard.env
+
+      - name: test relay.env file gen CockroachDB
+        run: test -f relay.env

.gitignore

@@ -29,4 +29,3 @@ infrastructure_files/setup.env
 infrastructure_files/setup-*.env
 .vscode
 .DS_Store
-*.db

.golangci.yaml

@@ -63,6 +63,14 @@ linters-settings:
     enable:
       - nilness
 
+  revive:
+    rules:
+      - name: exported
+        severity: warning
+        disabled: false
+        arguments:
+          - "checkPrivateReceivers"
+          - "sayRepetitiveInsteadOfStutters"
   tenv:
     # The option `all` will run against whole test files (`_test.go`) regardless of method/function signatures.
     # Otherwise, only methods that take `*testing.T`, `*testing.B`, and `testing.TB` as arguments are checked.
@@ -93,6 +101,7 @@ linters:
     - nilerr # finds the code that returns nil even if it checks that the error is not nil
     - nilnil # checks that there is no simultaneous return of nil error and an invalid value
     - predeclared # predeclared finds code that shadows one of Go's predeclared identifiers
+    - revive # Fast, configurable, extensible, flexible, and beautiful linter for Go. Drop-in replacement of golint.
     - sqlclosecheck # checks that sql.Rows and sql.Stmt are closed
     - thelper # thelper detects Go test helpers without t.Helper() call and checks the consistency of test helpers.
     - wastedassign # wastedassign finds wasted assignment statements
@@ -121,3 +130,10 @@ issues:
     - path: mock\.go
       linters:
       - nilnil
+    # Exclude specific deprecation warnings for grpc methods
+    - linters:
+       - staticcheck
+      text: "grpc.DialContext is deprecated"
+    - linters:
+        - staticcheck
+      text: "grpc.WithBlock is deprecated"

.goreleaser.yaml

@@ -80,6 +80,20 @@ builds:
       - -s -w -X github.com/netbirdio/netbird/version.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.CommitDate}} -X main.builtBy=goreleaser
     mod_timestamp: '{{ .CommitTimestamp }}'
 
+  - id: netbird-relay
+    dir: relay
+    env: [CGO_ENABLED=0]
+    binary: netbird-relay
+    goos:
+      - linux
+    goarch:
+      - amd64
+      - arm64
+      - arm
+    ldflags:
+      - -s -w -X github.com/netbirdio/netbird/version.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.CommitDate}} -X main.builtBy=goreleaser
+    mod_timestamp: '{{ .CommitTimestamp }}'
+
 archives:
   - builds:
       - netbird
@@ -161,6 +175,52 @@ dockers:
       - "--label=org.opencontainers.image.revision={{.FullCommit}}"
       - "--label=org.opencontainers.image.version={{.Version}}"
       - "--label=maintainer=dev@netbird.io"
+  - image_templates:
+      - netbirdio/relay:{{ .Version }}-amd64
+    ids:
+      - netbird-relay
+    goarch: amd64
+    use: buildx
+    dockerfile: relay/Dockerfile
+    build_flag_templates:
+      - "--platform=linux/amd64"
+      - "--label=org.opencontainers.image.created={{.Date}}"
+      - "--label=org.opencontainers.image.title={{.ProjectName}}"
+      - "--label=org.opencontainers.image.version={{.Version}}"
+      - "--label=org.opencontainers.image.revision={{.FullCommit}}"
+      - "--label=org.opencontainers.image.version={{.Version}}"
+      - "--label=maintainer=dev@netbird.io"
+  - image_templates:
+      - netbirdio/relay:{{ .Version }}-arm64v8
+    ids:
+      - netbird-relay
+    goarch: arm64
+    use: buildx
+    dockerfile: relay/Dockerfile
+    build_flag_templates:
+      - "--platform=linux/arm64"
+      - "--label=org.opencontainers.image.created={{.Date}}"
+      - "--label=org.opencontainers.image.title={{.ProjectName}}"
+      - "--label=org.opencontainers.image.version={{.Version}}"
+      - "--label=org.opencontainers.image.revision={{.FullCommit}}"
+      - "--label=org.opencontainers.image.version={{.Version}}"
+      - "--label=maintainer=dev@netbird.io"
+  - image_templates:
+      - netbirdio/relay:{{ .Version }}-arm
+    ids:
+      - netbird-relay
+    goarch: arm
+    goarm: 6
+    use: buildx
+    dockerfile: relay/Dockerfile
+    build_flag_templates:
+      - "--platform=linux/arm"
+      - "--label=org.opencontainers.image.created={{.Date}}"
+      - "--label=org.opencontainers.image.title={{.ProjectName}}"
+      - "--label=org.opencontainers.image.version={{.Version}}"
+      - "--label=org.opencontainers.image.revision={{.FullCommit}}"
+      - "--label=org.opencontainers.image.version={{.Version}}"
+      - "--label=maintainer=dev@netbird.io"
   - image_templates:
       - netbirdio/signal:{{ .Version }}-amd64
     ids:
@@ -313,6 +373,18 @@ docker_manifests:
       - netbirdio/netbird:{{ .Version }}-arm
       - netbirdio/netbird:{{ .Version }}-amd64
 
+  - name_template: netbirdio/relay:{{ .Version }}
+    image_templates:
+      - netbirdio/relay:{{ .Version }}-arm64v8
+      - netbirdio/relay:{{ .Version }}-arm
+      - netbirdio/relay:{{ .Version }}-amd64
+
+  - name_template: netbirdio/relay:latest
+    image_templates:
+      - netbirdio/relay:{{ .Version }}-arm64v8
+      - netbirdio/relay:{{ .Version }}-arm
+      - netbirdio/relay:{{ .Version }}-amd64
+
   - name_template: netbirdio/signal:{{ .Version }}
     image_templates:
       - netbirdio/signal:{{ .Version }}-arm64v8
@@ -386,4 +458,4 @@ checksum:
 release:
   extra_files:
     - glob: ./infrastructure_files/getting-started-with-zitadel.sh
-    - glob: ./release_files/install.sh
+    - glob: ./release_files/install.sh

.goreleaser_ui.yaml

@@ -11,8 +11,6 @@ builds:
       - amd64
     ldflags:
       - -s -w -X github.com/netbirdio/netbird/version.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.CommitDate}} -X main.builtBy=goreleaser
-    tags:
-      - legacy_appindicator
     mod_timestamp: '{{ .CommitTimestamp }}'
 
   - id: netbird-ui-windows
@@ -54,7 +52,7 @@ nfpms:
     contents:
       - src: client/ui/netbird.desktop
         dst: /usr/share/applications/netbird.desktop
-      - src: client/ui/netbird-systemtray-default.png
+      - src: client/ui/netbird-systemtray-connected.png
         dst: /usr/share/pixmaps/netbird.png
     dependencies:
       - netbird
@@ -71,7 +69,7 @@ nfpms:
     contents:
       - src: client/ui/netbird.desktop
         dst: /usr/share/applications/netbird.desktop
-      - src: client/ui/netbird-systemtray-default.png
+      - src: client/ui/netbird-systemtray-connected.png
         dst: /usr/share/pixmaps/netbird.png
     dependencies:
       - netbird

.goreleaser_ui_darwin.yaml

@@ -3,8 +3,10 @@ builds:
   - id: netbird-ui-darwin
     dir: client/ui
     binary: netbird-ui
-    env: [CGO_ENABLED=1]
-
+    env:
+      - CGO_ENABLED=1
+      - MACOSX_DEPLOYMENT_TARGET=11.0
+      - MACOS_DEPLOYMENT_TARGET=11.0
     goos:
       - darwin
     goarch:

CODE_OF_CONDUCT.md

@@ -5,7 +5,7 @@
 We as members, contributors, and leaders pledge to make participation in our
 community a harassment-free experience for everyone, regardless of age, body
 size, visible or invisible disability, ethnicity, sex characteristics, gender
-identity and expression, level of experience, education, socio-economic status,
+identity and expression, level of experience, education, socioeconomic status,
 nationality, personal appearance, race, caste, color, religion, or sexual
 identity and orientation.
 

README.md

@@ -1,6 +1,6 @@
 <p align="center">
- <strong>:hatching_chick: New Release! Self-hosting in under 5 min.</strong>
-  <a href="https://github.com/netbirdio/netbird#quickstart-with-self-hosted-netbird">
+ <strong>:hatching_chick: New Release! Device Posture Checks.</strong>
+  <a href="https://docs.netbird.io/how-to/manage-posture-checks">
        Learn more
      </a>   
 </p>
@@ -10,12 +10,14 @@
   <img width="234" src="docs/media/logo-full.png"/>
 </p>
   <p>
+   <a href="https://img.shields.io/badge/license-BSD--3-blue)">
+       <img src="https://sonarcloud.io/api/project_badges/measure?project=netbirdio_netbird&metric=alert_status" />
+     </a> 
      <a href="https://github.com/netbirdio/netbird/blob/main/LICENSE">
        <img src="https://img.shields.io/badge/license-BSD--3-blue" />
      </a> 
-   <a href="https://www.codacy.com/gh/netbirdio/netbird/dashboard?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=netbirdio/netbird&amp;utm_campaign=Badge_Grade"><img src="https://app.codacy.com/project/badge/Grade/e3013d046aec44cdb7462c8673b00976"/></a>
     <br>
-    <a href="https://join.slack.com/t/netbirdio/shared_invite/zt-vrahf41g-ik1v7fV8du6t0RwxSrJ96A">
+    <a href="https://join.slack.com/t/netbirdio/shared_invite/zt-2p5zwhm4g-8fHollzrQa5y4PZF5AEpvQ">
         <img src="https://img.shields.io/badge/slack-@netbird-red.svg?logo=slack"/>
      </a>    
   </p>
@@ -28,7 +30,7 @@
   <br/>
   See <a href="https://netbird.io/docs/">Documentation</a>
   <br/>
-   Join our <a href="https://join.slack.com/t/netbirdio/shared_invite/zt-vrahf41g-ik1v7fV8du6t0RwxSrJ96A">Slack channel</a>
+   Join our <a href="https://join.slack.com/t/netbirdio/shared_invite/zt-2p5zwhm4g-8fHollzrQa5y4PZF5AEpvQ">Slack channel</a>
   <br/>
  
 </strong>
@@ -40,27 +42,26 @@
 
 **Connect.** NetBird creates a WireGuard-based overlay network that automatically connects your machines over an encrypted tunnel, leaving behind the hassle of opening ports, complex firewall rules, VPN gateways, and so forth.
 
-**Secure.** NetBird enables secure remote access by applying granular access policies, while allowing you to manage them intuitively from a single place. Works universally on any infrastructure.
+**Secure.** NetBird enables secure remote access by applying granular access policies while allowing you to manage them intuitively from a single place. Works universally on any infrastructure.
 
-### Secure peer-to-peer VPN with SSO and MFA in minutes
+### Open-Source Network Security in a Single Platform
+
+
+![netbird_2](https://github.com/netbirdio/netbird/assets/700848/46bc3b73-508d-4a0e-bb9a-f465d68646ab)
 
-https://user-images.githubusercontent.com/700848/197345890-2e2cded5-7b7a-436f-a444-94e80dd24f46.mov
 
 ### Key features
 
-| Connectivity                             	                                                                                      | Management                                 	                             | Automation                                    	                            | Platforms    	                        |
-|---------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------|----------------------------------------------------------------------------|---------------------------------------|
-| <ul><li> - \[x] Kernel WireGuard </ul></li>                   	                                                                 | <ul><li> - \[x] [Admin Web UI](https://github.com/netbirdio/dashboard) </ul></li>                           	      | <ul><li> - \[x] [Public API](https://docs.netbird.io/api) </ul></li>                                	     | <ul><li> - \[x] Linux </ul></li>    	 |
-| <ul><li> - \[x] Peer-to-peer connections </ul></li>             	                                                               | <ul><li> - \[x] Auto peer discovery and configuration </ul></li>  	      | <ul><li> - \[x] [Setup keys for bulk network provisioning](https://docs.netbird.io/how-to/register-machines-using-setup-keys) </ul></li>  	     | <ul><li> - \[x] Mac </ul></li>      	 |
-| <ul><li> - \[x] Peer-to-peer encryption </ul></li>              	                                                               | <ul><li> - \[x] [IdP integrations](https://docs.netbird.io/selfhosted/identity-providers) </ul></li>                       	      | <ul><li> - \[x] [Self-hosting quickstart script](https://docs.netbird.io/selfhosted/selfhosted-quickstart) </ul></li>              	 | <ul><li> - \[x] Windows </ul></li>  	 |
-| <ul><li> - \[x] Connection relay fallback </ul></li>            	                                                               | <ul><li> - \[x] [SSO & MFA support](https://docs.netbird.io/how-to/installation#running-net-bird-with-sso-login) </ul></li>                      	      | <ul><li> - \[x] IdP groups sync with JWT </ul></li> 	                      | <ul><li> - \[x] Android </ul></li>  	 |
-| <ul><li> - \[x] [Routes to external networks](https://docs.netbird.io/how-to/routing-traffic-to-private-networks) </ul></li>  	 | <ul><li> - \[x] [Access control - groups & rules](https://docs.netbird.io/how-to/manage-network-access) </ul></li>      	        | 	                                                                          | <ul><li> - \[x] iOS </ul></li>      	 |
-| <ul><li> - \[x] NAT traversal with BPF </ul></li>                                                                               | <ul><li> - \[x] [Private DNS](https://docs.netbird.io/how-to/manage-dns-in-your-network) </ul></li>                            	      | 	                                                                          | <ul><li> - \[x] Docker </ul></li>   	 |
-| <ul><li> - \[x] Post-quantum-secure connection through [Rosenpass](https://rosenpass.eu) </ul></li>                             | <ul><li> - \[x] [Multiuser support](https://docs.netbird.io/how-to/add-users-to-your-network) </ul></li>                      	      | 	                                                                          | <ul><li> - \[x] OpenWRT </ul></li>  	 |
-| 	                                                                                                                               | <ul><li> - \[x] [Activity logging](https://docs.netbird.io/how-to/monitor-system-and-network-activity) </ul></li>                       	      | 	                                                                          | 	                                     |
-| 	                                                                                                                               | <ul><li> - \[x] SSH access management </ul></li>                       	 | 	                                                                          | 	                                     |
-
-
+| Connectivity                                                                                                                 | Management                                                                                               | Security                                                                                                                              | Automation                                                                                                                               | Platforms                                                                               |
+|------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------|
+| <ul><li> - \[x] Kernel WireGuard </ul></li>                                                                                  | <ul><li> - \[x] [Admin Web UI](https://github.com/netbirdio/dashboard) </ul></li>                        | <ul><li> - \[x] [SSO & MFA support](https://docs.netbird.io/how-to/installation#running-net-bird-with-sso-login) </ul></li>           | <ul><li> - \[x] [Public API](https://docs.netbird.io/api) </ul></li>                                                                     | <ul><li> - \[x] Linux </ul></li>                                                        |
+| <ul><li> - \[x] Peer-to-peer connections </ul></li>                                                                          | <ul><li> - \[x] Auto peer discovery and configuration </ul></li>                                         | <ul><li> - \[x] [Access control - groups & rules](https://docs.netbird.io/how-to/manage-network-access) </ul></li>                    | <ul><li> - \[x] [Setup keys for bulk network provisioning](https://docs.netbird.io/how-to/register-machines-using-setup-keys) </ul></li> | <ul><li> - \[x] Mac </ul></li>                                                          |
+| <ul><li> - \[x] Connection relay fallback </ul></li>                                                                         | <ul><li> - \[x] [IdP integrations](https://docs.netbird.io/selfhosted/identity-providers) </ul></li>     | <ul><li> - \[x] [Activity logging](https://docs.netbird.io/how-to/monitor-system-and-network-activity) </ul></li>                     | <ul><li> - \[x] [Self-hosting quickstart script](https://docs.netbird.io/selfhosted/selfhosted-quickstart) </ul></li>                    | <ul><li> - \[x] Windows </ul></li>                                                      |
+| <ul><li> - \[x] [Routes to external networks](https://docs.netbird.io/how-to/routing-traffic-to-private-networks) </ul></li> | <ul><li> - \[x] [Private DNS](https://docs.netbird.io/how-to/manage-dns-in-your-network) </ul></li>      | <ul><li> - \[x] [Device posture checks](https://docs.netbird.io/how-to/manage-posture-checks) </ul></li>                              | <ul><li> - \[x] IdP groups sync with JWT </ul></li>                                                                                      | <ul><li> - \[x] Android </ul></li>                                                      |
+| <ul><li> - \[x] NAT traversal with BPF </ul></li>                                                                            | <ul><li> - \[x] [Multiuser support](https://docs.netbird.io/how-to/add-users-to-your-network) </ul></li> | <ul><li> -  \[x] Peer-to-peer encryption </ul></li>                                                                                   |                                                                                                                                          | <ul><li> - \[x] iOS </ul></li>                                                          |
+|                                                                                                                              |                                                                                                          | <ul><li> - \[x] [Quantum-resistance with Rosenpass](https://netbird.io/knowledge-hub/the-first-quantum-resistant-mesh-vpn) </ul></li> |                                                                                                                                          | <ul><li> - \[x] OpenWRT </ul></li>                                                      |
+|                                                                                                                              |                                                                                                          | <ui><li> - \[x] [Periodic re-authentication](https://docs.netbird.io/how-to/enforce-periodic-user-authentication)</ul></li>           |                                                                                                                                          | <ul><li> - \[x] [Serverless](https://docs.netbird.io/how-to/netbird-on-faas) </ul></li> |
+|                                                                                                                              |                                                                                                          |                                                                                                                                       |                                                                                                                                          | <ul><li> - \[x] Docker </ul></li>                                                       |
 ### Quickstart with NetBird Cloud
 
 - Download and install NetBird at [https://app.netbird.io/install](https://app.netbird.io/install)
@@ -79,7 +80,7 @@ Follow the [Advanced guide with a custom identity provider](https://docs.netbird
 - **Public domain** name pointing to the VM.
 
 **Software requirements:**
-- Docker installed on the VM with the docker compose plugin ([Docker installation guide](https://docs.docker.com/engine/install/)) or docker with docker-compose in version 2 or higher.
+- Docker installed on the VM with the docker-compose plugin ([Docker installation guide](https://docs.docker.com/engine/install/)) or docker with docker-compose in version 2 or higher.
 - [jq](https://jqlang.github.io/jq/) installed. In most distributions
   Usually available in the official repositories and can be installed with `sudo apt install jq` or `sudo yum install jq`
 - [curl](https://curl.se/) installed.
@@ -96,9 +97,9 @@ export NETBIRD_DOMAIN=netbird.example.com; curl -fsSL https://github.com/netbird
 -  Every machine in the network runs [NetBird Agent (or Client)](client/) that manages WireGuard.
 -  Every agent connects to [Management Service](management/) that holds network state, manages peer IPs, and distributes network updates to agents (peers).
 -  NetBird agent uses WebRTC ICE implemented in [pion/ice library](https://github.com/pion/ice) to discover connection candidates when establishing a peer-to-peer connection between machines.
--  Connection candidates are discovered with a help of [STUN](https://en.wikipedia.org/wiki/STUN) servers.
+-  Connection candidates are discovered with the help of [STUN](https://en.wikipedia.org/wiki/STUN) servers.
 -  Agents negotiate a connection through [Signal Service](signal/) passing p2p encrypted messages with candidates.
--  Sometimes the NAT traversal is unsuccessful due to strict NATs (e.g. mobile carrier-grade NAT) and p2p connection isn't possible. When this occurs the system falls back to a relay server called [TURN](https://en.wikipedia.org/wiki/Traversal_Using_Relays_around_NAT), and a secure WireGuard tunnel is established via the TURN server. 
+-  Sometimes the NAT traversal is unsuccessful due to strict NATs (e.g. mobile carrier-grade NAT) and a p2p connection isn't possible. When this occurs the system falls back to a relay server called [TURN](https://en.wikipedia.org/wiki/Traversal_Using_Relays_around_NAT), and a secure WireGuard tunnel is established via the TURN server. 
  
 [Coturn](https://github.com/coturn/coturn) is the one that has been successfully used for STUN and TURN in NetBird setups.
 
@@ -109,8 +110,8 @@ export NETBIRD_DOMAIN=netbird.example.com; curl -fsSL https://github.com/netbird
 See a complete [architecture overview](https://docs.netbird.io/about-netbird/how-netbird-works#architecture) for details.
 
 ### Community projects
--  [NetBird on OpenWRT](https://github.com/messense/openwrt-netbird)
 -  [NetBird installer script](https://github.com/physk/netbird-installer)
+-  [NetBird ansible collection by Dominion Solutions](https://galaxy.ansible.com/ui/repo/published/dominion_solutions/netbird/)
 
 **Note**: The `main` branch may be in an *unstable or even broken state* during development.
 For stable versions, see [releases](https://github.com/netbirdio/netbird/releases).
@@ -122,7 +123,7 @@ In November 2022, NetBird joined the [StartUpSecure program](https://www.forschu
 ![CISPA_Logo_BLACK_EN_RZ_RGB (1)](https://user-images.githubusercontent.com/700848/203091324-c6d311a0-22b5-4b05-a288-91cbc6cdcc46.png)
 
 ### Testimonials
-We use open-source technologies like [WireGuard®](https://www.wireguard.com/), [Pion ICE (WebRTC)](https://github.com/pion/ice), [Coturn](https://github.com/coturn/coturn), and [Rosenpass](https://rosenpass.eu). We very much appreciate the work these guys are doing and we'd greatly appreciate if you could support them in any way (e.g. giving a star or a contribution).
+We use open-source technologies like [WireGuard®](https://www.wireguard.com/), [Pion ICE (WebRTC)](https://github.com/pion/ice), [Coturn](https://github.com/coturn/coturn), and [Rosenpass](https://rosenpass.eu). We very much appreciate the work these guys are doing and we'd greatly appreciate if you could support them in any way (e.g., by giving a star or a contribution).
 
 ### Legal
  _WireGuard_ and the _WireGuard_ logo are [registered trademarks](https://www.wireguard.com/trademark-policy/) of Jason A. Donenfeld.

client/Dockerfile

@@ -1,5 +1,5 @@
-FROM alpine:3.18.5
+FROM alpine:3.20
 RUN apk add --no-cache ca-certificates iptables ip6tables
 ENV NB_FOREGROUND_MODE=true
-ENTRYPOINT [ "/go/bin/netbird","up"]
-COPY netbird /go/bin/netbird
+ENTRYPOINT [ "/usr/local/bin/netbird","up"]
+COPY netbird /usr/local/bin/netbird

client/android/client.go

@@ -1,3 +1,5 @@
+//go:build android
+
 package android
 
 import (
@@ -14,6 +16,7 @@ import (
 	"github.com/netbirdio/netbird/client/system"
 	"github.com/netbirdio/netbird/formatter"
 	"github.com/netbirdio/netbird/iface"
+	"github.com/netbirdio/netbird/util/net"
 )
 
 // ConnectionListener export internal Listener for mobile
@@ -54,14 +57,17 @@ type Client struct {
 	ctxCancel             context.CancelFunc
 	ctxCancelLock         *sync.Mutex
 	deviceName            string
+	uiVersion             string
 	networkChangeListener listener.NetworkChangeListener
 }
 
 // NewClient instantiate a new Client
-func NewClient(cfgFile, deviceName string, tunAdapter TunAdapter, iFaceDiscover IFaceDiscover, networkChangeListener NetworkChangeListener) *Client {
+func NewClient(cfgFile, deviceName string, uiVersion string, tunAdapter TunAdapter, iFaceDiscover IFaceDiscover, networkChangeListener NetworkChangeListener) *Client {
+	net.SetAndroidProtectSocketFn(tunAdapter.ProtectSocket)
 	return &Client{
 		cfgFile:               cfgFile,
 		deviceName:            deviceName,
+		uiVersion:             uiVersion,
 		tunAdapter:            tunAdapter,
 		iFaceDiscover:         iFaceDiscover,
 		recorder:              peer.NewRecorder(""),
@@ -79,10 +85,14 @@ func (c *Client) Run(urlOpener URLOpener, dns *DNSList, dnsReadyListener DnsRead
 		return err
 	}
 	c.recorder.UpdateManagementAddress(cfg.ManagementURL.String())
+	c.recorder.UpdateRosenpass(cfg.RosenpassEnabled, cfg.RosenpassPermissive)
 
 	var ctx context.Context
 	//nolint
 	ctxWithValues := context.WithValue(context.Background(), system.DeviceNameCtxKey, c.deviceName)
+	//nolint
+	ctxWithValues = context.WithValue(ctxWithValues, system.UiVersionCtxKey, c.uiVersion)
+
 	c.ctxCancelLock.Lock()
 	ctx, c.ctxCancel = context.WithCancel(ctxWithValues)
 	defer c.ctxCancel()
@@ -96,7 +106,8 @@ func (c *Client) Run(urlOpener URLOpener, dns *DNSList, dnsReadyListener DnsRead
 
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, dns.items, dnsReadyListener)
+	connectClient := internal.NewConnectClient(ctx, cfg, c.recorder)
+	return connectClient.RunOnAndroid(c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, dns.items, dnsReadyListener)
 }
 
 // RunWithoutLogin we apply this type of run function when the backed has been started without UI (i.e. after reboot).
@@ -109,6 +120,7 @@ func (c *Client) RunWithoutLogin(dns *DNSList, dnsReadyListener DnsReadyListener
 		return err
 	}
 	c.recorder.UpdateManagementAddress(cfg.ManagementURL.String())
+	c.recorder.UpdateRosenpass(cfg.RosenpassEnabled, cfg.RosenpassPermissive)
 
 	var ctx context.Context
 	//nolint
@@ -120,7 +132,8 @@ func (c *Client) RunWithoutLogin(dns *DNSList, dnsReadyListener DnsReadyListener
 
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, dns.items, dnsReadyListener)
+	connectClient := internal.NewConnectClient(ctx, cfg, c.recorder)
+	return connectClient.RunOnAndroid(c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, dns.items, dnsReadyListener)
 }
 
 // Stop the internal client and free the resources
@@ -139,6 +152,11 @@ func (c *Client) SetTraceLogLevel() {
 	log.SetLevel(log.TraceLevel)
 }
 
+// SetInfoLogLevel configure the logger to info level
+func (c *Client) SetInfoLogLevel() {
+	log.SetLevel(log.InfoLevel)
+}
+
 // PeersList return with the list of the PeerInfos
 func (c *Client) PeersList() *PeerInfoArray {
 

client/android/login.go

@@ -84,7 +84,7 @@ func (a *Auth) SaveConfigIfSSOSupported(listener SSOListener) {
 func (a *Auth) saveConfigIfSSOSupported() (bool, error) {
 	supportsSSO := true
 	err := a.withBackOff(a.ctx, func() (err error) {
-		_, err = internal.GetPKCEAuthorizationFlowInfo(a.ctx, a.config.PrivateKey, a.config.ManagementURL)
+		_, err = internal.GetPKCEAuthorizationFlowInfo(a.ctx, a.config.PrivateKey, a.config.ManagementURL, nil)
 		if s, ok := gstatus.FromError(err); ok && (s.Code() == codes.NotFound || s.Code() == codes.Unimplemented) {
 			_, err = internal.GetDeviceAuthorizationFlowInfo(a.ctx, a.config.PrivateKey, a.config.ManagementURL)
 			s, ok := gstatus.FromError(err)

client/anonymize/anonymize.go

@@ -0,0 +1,227 @@
+package anonymize
+
+import (
+	"crypto/rand"
+	"fmt"
+	"math/big"
+	"net"
+	"net/netip"
+	"net/url"
+	"regexp"
+	"slices"
+	"strings"
+)
+
+type Anonymizer struct {
+	ipAnonymizer     map[netip.Addr]netip.Addr
+	domainAnonymizer map[string]string
+	currentAnonIPv4  netip.Addr
+	currentAnonIPv6  netip.Addr
+	startAnonIPv4    netip.Addr
+	startAnonIPv6    netip.Addr
+}
+
+func DefaultAddresses() (netip.Addr, netip.Addr) {
+	// 192.51.100.0, 100::
+	return netip.AddrFrom4([4]byte{198, 51, 100, 0}), netip.AddrFrom16([16]byte{0x01})
+}
+
+func NewAnonymizer(startIPv4, startIPv6 netip.Addr) *Anonymizer {
+	return &Anonymizer{
+		ipAnonymizer:     map[netip.Addr]netip.Addr{},
+		domainAnonymizer: map[string]string{},
+		currentAnonIPv4:  startIPv4,
+		currentAnonIPv6:  startIPv6,
+		startAnonIPv4:    startIPv4,
+		startAnonIPv6:    startIPv6,
+	}
+}
+
+func (a *Anonymizer) AnonymizeIP(ip netip.Addr) netip.Addr {
+	if ip.IsLoopback() ||
+		ip.IsLinkLocalUnicast() ||
+		ip.IsLinkLocalMulticast() ||
+		ip.IsInterfaceLocalMulticast() ||
+		ip.IsPrivate() ||
+		ip.IsUnspecified() ||
+		ip.IsMulticast() ||
+		isWellKnown(ip) ||
+		a.isInAnonymizedRange(ip) {
+
+		return ip
+	}
+
+	if _, ok := a.ipAnonymizer[ip]; !ok {
+		if ip.Is4() {
+			a.ipAnonymizer[ip] = a.currentAnonIPv4
+			a.currentAnonIPv4 = a.currentAnonIPv4.Next()
+		} else {
+			a.ipAnonymizer[ip] = a.currentAnonIPv6
+			a.currentAnonIPv6 = a.currentAnonIPv6.Next()
+		}
+	}
+	return a.ipAnonymizer[ip]
+}
+
+// isInAnonymizedRange checks if an IP is within the range of already assigned anonymized IPs
+func (a *Anonymizer) isInAnonymizedRange(ip netip.Addr) bool {
+	if ip.Is4() && ip.Compare(a.startAnonIPv4) >= 0 && ip.Compare(a.currentAnonIPv4) <= 0 {
+		return true
+	} else if !ip.Is4() && ip.Compare(a.startAnonIPv6) >= 0 && ip.Compare(a.currentAnonIPv6) <= 0 {
+		return true
+	}
+	return false
+}
+
+func (a *Anonymizer) AnonymizeIPString(ip string) string {
+	addr, err := netip.ParseAddr(ip)
+	if err != nil {
+		return ip
+	}
+
+	return a.AnonymizeIP(addr).String()
+}
+
+func (a *Anonymizer) AnonymizeDomain(domain string) string {
+	if strings.HasSuffix(domain, "netbird.io") ||
+		strings.HasSuffix(domain, "netbird.selfhosted") ||
+		strings.HasSuffix(domain, "netbird.cloud") ||
+		strings.HasSuffix(domain, "netbird.stage") ||
+		strings.HasSuffix(domain, ".domain") {
+		return domain
+	}
+
+	parts := strings.Split(domain, ".")
+	if len(parts) < 2 {
+		return domain
+	}
+
+	baseDomain := parts[len(parts)-2] + "." + parts[len(parts)-1]
+
+	anonymized, ok := a.domainAnonymizer[baseDomain]
+	if !ok {
+		anonymizedBase := "anon-" + generateRandomString(5) + ".domain"
+		a.domainAnonymizer[baseDomain] = anonymizedBase
+		anonymized = anonymizedBase
+	}
+
+	return strings.Replace(domain, baseDomain, anonymized, 1)
+}
+
+func (a *Anonymizer) AnonymizeURI(uri string) string {
+	u, err := url.Parse(uri)
+	if err != nil {
+		return uri
+	}
+
+	var anonymizedHost string
+	if u.Opaque != "" {
+		host, port, err := net.SplitHostPort(u.Opaque)
+		if err == nil {
+			anonymizedHost = fmt.Sprintf("%s:%s", a.AnonymizeDomain(host), port)
+		} else {
+			anonymizedHost = a.AnonymizeDomain(u.Opaque)
+		}
+		u.Opaque = anonymizedHost
+	} else if u.Host != "" {
+		host, port, err := net.SplitHostPort(u.Host)
+		if err == nil {
+			anonymizedHost = fmt.Sprintf("%s:%s", a.AnonymizeDomain(host), port)
+		} else {
+			anonymizedHost = a.AnonymizeDomain(u.Host)
+		}
+		u.Host = anonymizedHost
+	}
+	return u.String()
+}
+
+func (a *Anonymizer) AnonymizeString(str string) string {
+	ipv4Regex := regexp.MustCompile(`\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b`)
+	ipv6Regex := regexp.MustCompile(`\b([0-9a-fA-F:]+:+[0-9a-fA-F]{0,4})(?:%[0-9a-zA-Z]+)?(?:\/[0-9]{1,3})?(?::[0-9]{1,5})?\b`)
+
+	str = ipv4Regex.ReplaceAllStringFunc(str, a.AnonymizeIPString)
+	str = ipv6Regex.ReplaceAllStringFunc(str, a.AnonymizeIPString)
+
+	for domain, anonDomain := range a.domainAnonymizer {
+		str = strings.ReplaceAll(str, domain, anonDomain)
+	}
+
+	str = a.AnonymizeSchemeURI(str)
+	str = a.AnonymizeDNSLogLine(str)
+
+	return str
+}
+
+// AnonymizeSchemeURI finds and anonymizes URIs with stun, stuns, turn, and turns schemes.
+func (a *Anonymizer) AnonymizeSchemeURI(text string) string {
+	re := regexp.MustCompile(`(?i)\b(stuns?:|turns?:|https?://)\S+\b`)
+
+	return re.ReplaceAllStringFunc(text, a.AnonymizeURI)
+}
+
+// AnonymizeDNSLogLine anonymizes domain names in DNS log entries by replacing them with a random string.
+func (a *Anonymizer) AnonymizeDNSLogLine(logEntry string) string {
+	domainPattern := `dns\.Question{Name:"([^"]+)",`
+	domainRegex := regexp.MustCompile(domainPattern)
+
+	return domainRegex.ReplaceAllStringFunc(logEntry, func(match string) string {
+		parts := strings.Split(match, `"`)
+		if len(parts) >= 2 {
+			domain := parts[1]
+			if strings.HasSuffix(domain, ".domain") {
+				return match
+			}
+			randomDomain := generateRandomString(10) + ".domain"
+			return strings.Replace(match, domain, randomDomain, 1)
+		}
+		return match
+	})
+}
+
+// AnonymizeRoute anonymizes a route string by replacing IP addresses with anonymized versions and
+// domain names with random strings.
+func (a *Anonymizer) AnonymizeRoute(route string) string {
+	prefix, err := netip.ParsePrefix(route)
+	if err == nil {
+		ip := a.AnonymizeIPString(prefix.Addr().String())
+		return fmt.Sprintf("%s/%d", ip, prefix.Bits())
+	}
+	domains := strings.Split(route, ", ")
+	for i, domain := range domains {
+		domains[i] = a.AnonymizeDomain(domain)
+	}
+	return strings.Join(domains, ", ")
+}
+
+func isWellKnown(addr netip.Addr) bool {
+	wellKnown := []string{
+		"8.8.8.8", "8.8.4.4", // Google DNS IPv4
+		"2001:4860:4860::8888", "2001:4860:4860::8844", // Google DNS IPv6
+		"1.1.1.1", "1.0.0.1", // Cloudflare DNS IPv4
+		"2606:4700:4700::1111", "2606:4700:4700::1001", // Cloudflare DNS IPv6
+		"9.9.9.9", "149.112.112.112", // Quad9 DNS IPv4
+		"2620:fe::fe", "2620:fe::9", // Quad9 DNS IPv6
+	}
+
+	if slices.Contains(wellKnown, addr.String()) {
+		return true
+	}
+
+	cgnatRangeStart := netip.AddrFrom4([4]byte{100, 64, 0, 0})
+	cgnatRange := netip.PrefixFrom(cgnatRangeStart, 10)
+
+	return cgnatRange.Contains(addr)
+}
+
+func generateRandomString(length int) string {
+	const letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	result := make([]byte, length)
+	for i := range result {
+		num, err := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))
+		if err != nil {
+			continue
+		}
+		result[i] = letters[num.Int64()]
+	}
+	return string(result)
+}

client/anonymize/anonymize_test.go

@@ -0,0 +1,223 @@
+package anonymize_test
+
+import (
+	"net/netip"
+	"regexp"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/netbirdio/netbird/client/anonymize"
+)
+
+func TestAnonymizeIP(t *testing.T) {
+	startIPv4 := netip.MustParseAddr("198.51.100.0")
+	startIPv6 := netip.MustParseAddr("100::")
+	anonymizer := anonymize.NewAnonymizer(startIPv4, startIPv6)
+
+	tests := []struct {
+		name   string
+		ip     string
+		expect string
+	}{
+		{"Well known", "8.8.8.8", "8.8.8.8"},
+		{"First Public IPv4", "1.2.3.4", "198.51.100.0"},
+		{"Second Public IPv4", "4.3.2.1", "198.51.100.1"},
+		{"Repeated IPv4", "1.2.3.4", "198.51.100.0"},
+		{"Private IPv4", "192.168.1.1", "192.168.1.1"},
+		{"First Public IPv6", "2607:f8b0:4005:805::200e", "100::"},
+		{"Second Public IPv6", "a::b", "100::1"},
+		{"Repeated IPv6", "2607:f8b0:4005:805::200e", "100::"},
+		{"Private IPv6", "fe80::1", "fe80::1"},
+		{"In Range IPv4", "198.51.100.2", "198.51.100.2"},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			ip := netip.MustParseAddr(tc.ip)
+			anonymizedIP := anonymizer.AnonymizeIP(ip)
+			if anonymizedIP.String() != tc.expect {
+				t.Errorf("%s: expected %s, got %s", tc.name, tc.expect, anonymizedIP)
+			}
+		})
+	}
+}
+
+func TestAnonymizeDNSLogLine(t *testing.T) {
+	anonymizer := anonymize.NewAnonymizer(netip.Addr{}, netip.Addr{})
+	testLog := `2024-04-23T20:01:11+02:00 TRAC client/internal/dns/local.go:25: received question: dns.Question{Name:"example.com", Qtype:0x1c, Qclass:0x1}`
+
+	result := anonymizer.AnonymizeDNSLogLine(testLog)
+	require.NotEqual(t, testLog, result)
+	assert.NotContains(t, result, "example.com")
+}
+
+func TestAnonymizeDomain(t *testing.T) {
+	anonymizer := anonymize.NewAnonymizer(netip.Addr{}, netip.Addr{})
+	tests := []struct {
+		name            string
+		domain          string
+		expectPattern   string
+		shouldAnonymize bool
+	}{
+		{
+			"General Domain",
+			"example.com",
+			`^anon-[a-zA-Z0-9]+\.domain$`,
+			true,
+		},
+		{
+			"Subdomain",
+			"sub.example.com",
+			`^sub\.anon-[a-zA-Z0-9]+\.domain$`,
+			true,
+		},
+		{
+			"Protected Domain",
+			"netbird.io",
+			`^netbird\.io$`,
+			false,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			result := anonymizer.AnonymizeDomain(tc.domain)
+			if tc.shouldAnonymize {
+				assert.Regexp(t, tc.expectPattern, result, "The anonymized domain should match the expected pattern")
+				assert.NotContains(t, result, tc.domain, "The original domain should not be present in the result")
+			} else {
+				assert.Equal(t, tc.domain, result, "Protected domains should not be anonymized")
+			}
+		})
+	}
+}
+
+func TestAnonymizeURI(t *testing.T) {
+	anonymizer := anonymize.NewAnonymizer(netip.Addr{}, netip.Addr{})
+	tests := []struct {
+		name  string
+		uri   string
+		regex string
+	}{
+		{
+			"HTTP URI with Port",
+			"http://example.com:80/path",
+			`^http://anon-[a-zA-Z0-9]+\.domain:80/path$`,
+		},
+		{
+			"HTTP URI without Port",
+			"http://example.com/path",
+			`^http://anon-[a-zA-Z0-9]+\.domain/path$`,
+		},
+		{
+			"Opaque URI with Port",
+			"stun:example.com:80?transport=udp",
+			`^stun:anon-[a-zA-Z0-9]+\.domain:80\?transport=udp$`,
+		},
+		{
+			"Opaque URI without Port",
+			"stun:example.com?transport=udp",
+			`^stun:anon-[a-zA-Z0-9]+\.domain\?transport=udp$`,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			result := anonymizer.AnonymizeURI(tc.uri)
+			assert.Regexp(t, regexp.MustCompile(tc.regex), result, "URI should match expected pattern")
+			require.NotContains(t, result, "example.com", "Original domain should not be present")
+		})
+	}
+}
+
+func TestAnonymizeSchemeURI(t *testing.T) {
+	anonymizer := anonymize.NewAnonymizer(netip.Addr{}, netip.Addr{})
+	tests := []struct {
+		name   string
+		input  string
+		expect string
+	}{
+		{"STUN URI in text", "Connection made via stun:example.com", `Connection made via stun:anon-[a-zA-Z0-9]+\.domain`},
+		{"TURN URI in log", "Failed attempt turn:some.example.com:3478?transport=tcp: retrying", `Failed attempt turn:some.anon-[a-zA-Z0-9]+\.domain:3478\?transport=tcp: retrying`},
+		{"HTTPS URI in message", "Visit https://example.com for more", `Visit https://anon-[a-zA-Z0-9]+\.domain for more`},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			result := anonymizer.AnonymizeSchemeURI(tc.input)
+			assert.Regexp(t, tc.expect, result, "The anonymized output should match expected pattern")
+			require.NotContains(t, result, "example.com", "Original domain should not be present")
+		})
+	}
+}
+
+func TestAnonymizString_MemorizedDomain(t *testing.T) {
+	anonymizer := anonymize.NewAnonymizer(netip.Addr{}, netip.Addr{})
+	domain := "example.com"
+	anonymizedDomain := anonymizer.AnonymizeDomain(domain)
+
+	sampleString := "This is a test string including the domain example.com which should be anonymized."
+
+	firstPassResult := anonymizer.AnonymizeString(sampleString)
+	secondPassResult := anonymizer.AnonymizeString(firstPassResult)
+
+	assert.Contains(t, firstPassResult, anonymizedDomain, "The domain should be anonymized in the first pass")
+	assert.NotContains(t, firstPassResult, domain, "The original domain should not appear in the first pass output")
+
+	assert.Equal(t, firstPassResult, secondPassResult, "The second pass should not further anonymize the string")
+}
+
+func TestAnonymizeString_DoubleURI(t *testing.T) {
+	anonymizer := anonymize.NewAnonymizer(netip.Addr{}, netip.Addr{})
+	domain := "example.com"
+	anonymizedDomain := anonymizer.AnonymizeDomain(domain)
+
+	sampleString := "Check out our site at https://example.com for more info."
+
+	firstPassResult := anonymizer.AnonymizeString(sampleString)
+	secondPassResult := anonymizer.AnonymizeString(firstPassResult)
+
+	assert.Contains(t, firstPassResult, "https://"+anonymizedDomain, "The URI should be anonymized in the first pass")
+	assert.NotContains(t, firstPassResult, "https://example.com", "The original URI should not appear in the first pass output")
+
+	assert.Equal(t, firstPassResult, secondPassResult, "The second pass should not further anonymize the URI")
+}
+
+func TestAnonymizeString_IPAddresses(t *testing.T) {
+	anonymizer := anonymize.NewAnonymizer(anonymize.DefaultAddresses())
+	tests := []struct {
+		name   string
+		input  string
+		expect string
+	}{
+		{
+			name:   "IPv4 Address",
+			input:  "Error occurred at IP 122.138.1.1",
+			expect: "Error occurred at IP 198.51.100.0",
+		},
+		{
+			name:   "IPv6 Address",
+			input:  "Access attempted from 2001:db8::ff00:42",
+			expect: "Access attempted from 100::",
+		},
+		{
+			name:   "IPv6 Address with Port",
+			input:  "Access attempted from [2001:db8::ff00:42]:8080",
+			expect: "Access attempted from [100::]:8080",
+		},
+		{
+			name:   "Both IPv4 and IPv6",
+			input:  "IPv4: 142.108.0.1 and IPv6: 2001:db8::ff00:43",
+			expect: "IPv4: 198.51.100.1 and IPv6: 100::1",
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			result := anonymizer.AnonymizeString(tc.input)
+			assert.Equal(t, tc.expect, result, "IP addresses should be anonymized correctly")
+		})
+	}
+}

client/cmd/debug.go

@@ -0,0 +1,273 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"google.golang.org/grpc/status"
+
+	"github.com/netbirdio/netbird/client/internal"
+	"github.com/netbirdio/netbird/client/proto"
+	"github.com/netbirdio/netbird/client/server"
+)
+
+const errCloseConnection = "Failed to close connection: %v"
+
+var debugCmd = &cobra.Command{
+	Use:   "debug",
+	Short: "Debugging commands",
+	Long:  "Provides commands for debugging and logging control within the Netbird daemon.",
+}
+
+var debugBundleCmd = &cobra.Command{
+	Use:     "bundle",
+	Example: "  netbird debug bundle",
+	Short:   "Create a debug bundle",
+	Long:    "Generates a compressed archive of the daemon's logs and status for debugging purposes.",
+	RunE:    debugBundle,
+}
+
+var logCmd = &cobra.Command{
+	Use:   "log",
+	Short: "Manage logging for the Netbird daemon",
+	Long:  `Commands to manage logging settings for the Netbird daemon, including ICE, gRPC, and general log levels.`,
+}
+
+var logLevelCmd = &cobra.Command{
+	Use:   "level <level>",
+	Short: "Set the logging level for this session",
+	Long: `Sets the logging level for the current session. This setting is temporary and will revert to the default on daemon restart.
+Available log levels are:
+  panic:   for panic level, highest level of severity
+  fatal:   for fatal level errors that cause the program to exit
+  error:   for error conditions
+  warn:    for warning conditions
+  info:    for informational messages
+  debug:   for debug-level messages
+  trace:   for trace-level messages, which include more fine-grained information than debug`,
+	Args: cobra.ExactArgs(1),
+	RunE: setLogLevel,
+}
+
+var forCmd = &cobra.Command{
+	Use:     "for <time>",
+	Short:   "Run debug logs for a specified duration and create a debug bundle",
+	Long:    `Sets the logging level to trace, runs for the specified duration, and then generates a debug bundle.`,
+	Example: "  netbird debug for 5m",
+	Args:    cobra.ExactArgs(1),
+	RunE:    runForDuration,
+}
+
+func debugBundle(cmd *cobra.Command, _ []string) error {
+	conn, err := getClient(cmd)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err := conn.Close(); err != nil {
+			log.Errorf(errCloseConnection, err)
+		}
+	}()
+
+	client := proto.NewDaemonServiceClient(conn)
+	resp, err := client.DebugBundle(cmd.Context(), &proto.DebugBundleRequest{
+		Anonymize:  anonymizeFlag,
+		Status:     getStatusOutput(cmd),
+		SystemInfo: debugSystemInfoFlag,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to bundle debug: %v", status.Convert(err).Message())
+	}
+
+	cmd.Println(resp.GetPath())
+
+	return nil
+}
+
+func setLogLevel(cmd *cobra.Command, args []string) error {
+	conn, err := getClient(cmd)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err := conn.Close(); err != nil {
+			log.Errorf(errCloseConnection, err)
+		}
+	}()
+
+	client := proto.NewDaemonServiceClient(conn)
+	level := server.ParseLogLevel(args[0])
+	if level == proto.LogLevel_UNKNOWN {
+		return fmt.Errorf("unknown log level: %s. Available levels are: panic, fatal, error, warn, info, debug, trace\n", args[0])
+	}
+
+	_, err = client.SetLogLevel(cmd.Context(), &proto.SetLogLevelRequest{
+		Level: level,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to set log level: %v", status.Convert(err).Message())
+	}
+
+	cmd.Println("Log level set successfully to", args[0])
+	return nil
+}
+
+func runForDuration(cmd *cobra.Command, args []string) error {
+	duration, err := time.ParseDuration(args[0])
+	if err != nil {
+		return fmt.Errorf("invalid duration format: %v", err)
+	}
+
+	conn, err := getClient(cmd)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err := conn.Close(); err != nil {
+			log.Errorf(errCloseConnection, err)
+		}
+	}()
+
+	client := proto.NewDaemonServiceClient(conn)
+
+	stat, err := client.Status(cmd.Context(), &proto.StatusRequest{})
+	if err != nil {
+		return fmt.Errorf("failed to get status: %v", status.Convert(err).Message())
+	}
+
+	stateWasDown := stat.Status != string(internal.StatusConnected) && stat.Status != string(internal.StatusConnecting)
+
+	initialLogLevel, err := client.GetLogLevel(cmd.Context(), &proto.GetLogLevelRequest{})
+	if err != nil {
+		return fmt.Errorf("failed to get log level: %v", status.Convert(err).Message())
+	}
+
+	if stateWasDown {
+		if _, err := client.Up(cmd.Context(), &proto.UpRequest{}); err != nil {
+			return fmt.Errorf("failed to up: %v", status.Convert(err).Message())
+		}
+		cmd.Println("Netbird up")
+		time.Sleep(time.Second * 10)
+	}
+
+	initialLevelTrace := initialLogLevel.GetLevel() >= proto.LogLevel_TRACE
+	if !initialLevelTrace {
+		_, err = client.SetLogLevel(cmd.Context(), &proto.SetLogLevelRequest{
+			Level: proto.LogLevel_TRACE,
+		})
+		if err != nil {
+			return fmt.Errorf("failed to set log level to TRACE: %v", status.Convert(err).Message())
+		}
+		cmd.Println("Log level set to trace.")
+	}
+
+	if _, err := client.Down(cmd.Context(), &proto.DownRequest{}); err != nil {
+		return fmt.Errorf("failed to down: %v", status.Convert(err).Message())
+	}
+	cmd.Println("Netbird down")
+
+	time.Sleep(1 * time.Second)
+
+	if _, err := client.Up(cmd.Context(), &proto.UpRequest{}); err != nil {
+		return fmt.Errorf("failed to up: %v", status.Convert(err).Message())
+	}
+	cmd.Println("Netbird up")
+
+	time.Sleep(3 * time.Second)
+
+	headerPostUp := fmt.Sprintf("----- Netbird post-up - Timestamp: %s", time.Now().Format(time.RFC3339))
+	statusOutput := fmt.Sprintf("%s\n%s", headerPostUp, getStatusOutput(cmd))
+
+	if waitErr := waitForDurationOrCancel(cmd.Context(), duration, cmd); waitErr != nil {
+		return waitErr
+	}
+	cmd.Println("\nDuration completed")
+
+	cmd.Println("Creating debug bundle...")
+
+	headerPreDown := fmt.Sprintf("----- Netbird pre-down - Timestamp: %s - Duration: %s", time.Now().Format(time.RFC3339), duration)
+	statusOutput = fmt.Sprintf("%s\n%s\n%s", statusOutput, headerPreDown, getStatusOutput(cmd))
+
+	resp, err := client.DebugBundle(cmd.Context(), &proto.DebugBundleRequest{
+		Anonymize:  anonymizeFlag,
+		Status:     statusOutput,
+		SystemInfo: debugSystemInfoFlag,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to bundle debug: %v", status.Convert(err).Message())
+	}
+
+	if stateWasDown {
+		if _, err := client.Down(cmd.Context(), &proto.DownRequest{}); err != nil {
+			return fmt.Errorf("failed to down: %v", status.Convert(err).Message())
+		}
+		cmd.Println("Netbird down")
+	}
+
+	if !initialLevelTrace {
+		if _, err := client.SetLogLevel(cmd.Context(), &proto.SetLogLevelRequest{Level: initialLogLevel.GetLevel()}); err != nil {
+			return fmt.Errorf("failed to restore log level: %v", status.Convert(err).Message())
+		}
+		cmd.Println("Log level restored to", initialLogLevel.GetLevel())
+	}
+
+	cmd.Println(resp.GetPath())
+
+	return nil
+}
+
+func getStatusOutput(cmd *cobra.Command) string {
+	var statusOutputString string
+	statusResp, err := getStatus(cmd.Context())
+	if err != nil {
+		cmd.PrintErrf("Failed to get status: %v\n", err)
+	} else {
+		statusOutputString = parseToFullDetailSummary(convertToStatusOutputOverview(statusResp))
+	}
+	return statusOutputString
+}
+
+func waitForDurationOrCancel(ctx context.Context, duration time.Duration, cmd *cobra.Command) error {
+	ticker := time.NewTicker(1 * time.Second)
+	defer ticker.Stop()
+
+	startTime := time.Now()
+
+	done := make(chan struct{})
+	go func() {
+		defer close(done)
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-ticker.C:
+				elapsed := time.Since(startTime)
+				if elapsed >= duration {
+					return
+				}
+				remaining := duration - elapsed
+				cmd.Printf("\rRemaining time: %s", formatDuration(remaining))
+			}
+		}
+	}()
+
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	case <-done:
+		return nil
+	}
+}
+
+func formatDuration(d time.Duration) string {
+	d = d.Round(time.Second)
+	h := d / time.Hour
+	d %= time.Hour
+	m := d / time.Minute
+	d %= time.Minute
+	s := d / time.Second
+	return fmt.Sprintf("%02d:%02d:%02d", h, m, s)
+}

client/cmd/down.go

@@ -2,9 +2,10 @@ package cmd
 
 import (
 	"context"
-	"github.com/netbirdio/netbird/util"
 	"time"
 
+	"github.com/netbirdio/netbird/util"
+
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 
@@ -25,7 +26,7 @@ var downCmd = &cobra.Command{
 			return err
 		}
 
-		ctx, cancel := context.WithTimeout(context.Background(), time.Second*3)
+		ctx, cancel := context.WithTimeout(context.Background(), time.Second*7)
 		defer cancel()
 
 		conn, err := DialClientGRPCServer(ctx, daemonAddr)
@@ -41,6 +42,8 @@ var downCmd = &cobra.Command{
 			log.Errorf("call service down method: %v", err)
 			return err
 		}
+
+		cmd.Println("Disconnected")
 		return nil
 	},
 }

client/cmd/login.go

@@ -39,6 +39,11 @@ var loginCmd = &cobra.Command{
 			ctx = context.WithValue(ctx, system.DeviceNameCtxKey, hostName)
 		}
 
+		providedSetupKey, err := getSetupKey()
+		if err != nil {
+			return err
+		}
+
 		// workaround to run without service
 		if logFile == "console" {
 			err = handleRebrand(cmd)
@@ -62,7 +67,7 @@ var loginCmd = &cobra.Command{
 
 			config, _ = internal.UpdateOldManagementURL(ctx, config, configPath)
 
-			err = foregroundLogin(ctx, cmd, config, setupKey)
+			err = foregroundLogin(ctx, cmd, config, providedSetupKey)
 			if err != nil {
 				return fmt.Errorf("foreground login failed: %v", err)
 			}
@@ -81,7 +86,7 @@ var loginCmd = &cobra.Command{
 		client := proto.NewDaemonServiceClient(conn)
 
 		loginRequest := proto.LoginRequest{
-			SetupKey:             setupKey,
+			SetupKey:             providedSetupKey,
 			ManagementUrl:        managementURL,
 			IsLinuxDesktopClient: isLinuxRunningDesktop(),
 			Hostname:             hostName,

client/cmd/root.go

@@ -25,12 +25,19 @@ import (
 )
 
 const (
-	externalIPMapFlag   = "external-ip-map"
-	dnsResolverAddress  = "dns-resolver-address"
-	enableRosenpassFlag = "enable-rosenpass"
-	preSharedKeyFlag    = "preshared-key"
-	interfaceNameFlag   = "interface-name"
-	wireguardPortFlag   = "wireguard-port"
+	externalIPMapFlag       = "external-ip-map"
+	dnsResolverAddress      = "dns-resolver-address"
+	enableRosenpassFlag     = "enable-rosenpass"
+	rosenpassPermissiveFlag = "rosenpass-permissive"
+	preSharedKeyFlag        = "preshared-key"
+	interfaceNameFlag       = "interface-name"
+	wireguardPortFlag       = "wireguard-port"
+	networkMonitorFlag      = "network-monitor"
+	disableAutoConnectFlag  = "disable-auto-connect"
+	serverSSHAllowedFlag    = "allow-server-ssh"
+	extraIFaceBlackListFlag = "extra-iface-blacklist"
+	dnsRouteIntervalFlag    = "dns-router-interval"
+	systemInfoFlag          = "system-info"
 )
 
 var (
@@ -49,14 +56,25 @@ var (
 	managementURL           string
 	adminURL                string
 	setupKey                string
+	setupKeyPath            string
 	hostName                string
 	preSharedKey            string
 	natExternalIPs          []string
 	customDNSAddress        string
 	rosenpassEnabled        bool
+	rosenpassPermissive     bool
+	serverSSHAllowed        bool
 	interfaceName           string
 	wireguardPort           uint16
-	rootCmd                 = &cobra.Command{
+	networkMonitor          bool
+	serviceName             string
+	autoConnectDisabled     bool
+	extraIFaceBlackList     []string
+	anonymizeFlag           bool
+	debugSystemInfoFlag     bool
+	dnsRouteInterval        time.Duration
+
+	rootCmd = &cobra.Command{
 		Use:          "netbird",
 		Short:        "",
 		Long:         "",
@@ -76,12 +94,15 @@ func init() {
 	oldDefaultConfigPathDir = "/etc/wiretrustee/"
 	oldDefaultLogFileDir = "/var/log/wiretrustee/"
 
-	if runtime.GOOS == "windows" {
+	switch runtime.GOOS {
+	case "windows":
 		defaultConfigPathDir = os.Getenv("PROGRAMDATA") + "\\Netbird\\"
 		defaultLogFileDir = os.Getenv("PROGRAMDATA") + "\\Netbird\\"
 
 		oldDefaultConfigPathDir = os.Getenv("PROGRAMDATA") + "\\Wiretrustee\\"
 		oldDefaultLogFileDir = os.Getenv("PROGRAMDATA") + "\\Wiretrustee\\"
+	case "freebsd":
+		defaultConfigPathDir = "/var/db/netbird/"
 	}
 
 	defaultConfigPath = defaultConfigPathDir + "config.json"
@@ -94,15 +115,26 @@ func init() {
 	if runtime.GOOS == "windows" {
 		defaultDaemonAddr = "tcp://127.0.0.1:41731"
 	}
+
+	defaultServiceName := "netbird"
+	if runtime.GOOS == "windows" {
+		defaultServiceName = "Netbird"
+	}
+
 	rootCmd.PersistentFlags().StringVar(&daemonAddr, "daemon-addr", defaultDaemonAddr, "Daemon service address to serve CLI requests [unix|tcp]://[path|host:port]")
 	rootCmd.PersistentFlags().StringVarP(&managementURL, "management-url", "m", "", fmt.Sprintf("Management Service URL [http|https]://[host]:[port] (default \"%s\")", internal.DefaultManagementURL))
 	rootCmd.PersistentFlags().StringVar(&adminURL, "admin-url", "", fmt.Sprintf("Admin Panel URL [http|https]://[host]:[port] (default \"%s\")", internal.DefaultAdminURL))
+	rootCmd.PersistentFlags().StringVarP(&serviceName, "service", "s", defaultServiceName, "Netbird system service name")
 	rootCmd.PersistentFlags().StringVarP(&configPath, "config", "c", defaultConfigPath, "Netbird config file location")
 	rootCmd.PersistentFlags().StringVarP(&logLevel, "log-level", "l", "info", "sets Netbird log level")
-	rootCmd.PersistentFlags().StringVar(&logFile, "log-file", defaultLogFile, "sets Netbird log path. If console is specified the log will be output to stdout")
+	rootCmd.PersistentFlags().StringVar(&logFile, "log-file", defaultLogFile, "sets Netbird log path. If console is specified the log will be output to stdout. If syslog is specified the log will be sent to syslog daemon.")
 	rootCmd.PersistentFlags().StringVarP(&setupKey, "setup-key", "k", "", "Setup key obtained from the Management Service Dashboard (used to register peer)")
+	rootCmd.PersistentFlags().StringVar(&setupKeyPath, "setup-key-file", "", "The path to a setup key obtained from the Management Service Dashboard (used to register peer) This is ignored if the setup-key flag is provided.")
+	rootCmd.MarkFlagsMutuallyExclusive("setup-key", "setup-key-file")
 	rootCmd.PersistentFlags().StringVar(&preSharedKey, preSharedKeyFlag, "", "Sets Wireguard PreSharedKey property. If set, then only peers that have the same key can communicate.")
 	rootCmd.PersistentFlags().StringVarP(&hostName, "hostname", "n", "", "Sets a custom hostname for the device")
+	rootCmd.PersistentFlags().BoolVarP(&anonymizeFlag, "anonymize", "A", false, "anonymize IP addresses and non-netbird.io domains in logs and status output")
+
 	rootCmd.AddCommand(serviceCmd)
 	rootCmd.AddCommand(upCmd)
 	rootCmd.AddCommand(downCmd)
@@ -110,8 +142,20 @@ func init() {
 	rootCmd.AddCommand(loginCmd)
 	rootCmd.AddCommand(versionCmd)
 	rootCmd.AddCommand(sshCmd)
+	rootCmd.AddCommand(routesCmd)
+	rootCmd.AddCommand(debugCmd)
+
 	serviceCmd.AddCommand(runCmd, startCmd, stopCmd, restartCmd) // service control commands are subcommands of service
 	serviceCmd.AddCommand(installCmd, uninstallCmd)              // service installer commands are subcommands of service
+
+	routesCmd.AddCommand(routesListCmd)
+	routesCmd.AddCommand(routesSelectCmd, routesDeselectCmd)
+
+	debugCmd.AddCommand(debugBundleCmd)
+	debugCmd.AddCommand(logCmd)
+	logCmd.AddCommand(logLevelCmd)
+	debugCmd.AddCommand(forCmd)
+
 	upCmd.PersistentFlags().StringSliceVar(&natExternalIPs, externalIPMapFlag, nil,
 		`Sets external IPs maps between local addresses and interfaces.`+
 			`You can specify a comma-separated list with a single IP and IP/IP or IP/Interface Name. `+
@@ -126,6 +170,11 @@ func init() {
 			`E.g. --dns-resolver-address 127.0.0.1:5053 or --dns-resolver-address ""`,
 	)
 	upCmd.PersistentFlags().BoolVar(&rosenpassEnabled, enableRosenpassFlag, false, "[Experimental] Enable Rosenpass feature. If enabled, the connection will be post-quantum secured via Rosenpass.")
+	upCmd.PersistentFlags().BoolVar(&rosenpassPermissive, rosenpassPermissiveFlag, false, "[Experimental] Enable Rosenpass in permissive mode to allow this peer to accept WireGuard connections without requiring Rosenpass functionality from peers that do not have Rosenpass enabled.")
+	upCmd.PersistentFlags().BoolVar(&serverSSHAllowed, serverSSHAllowedFlag, false, "Allow SSH server on peer. If enabled, the SSH server will be permitted")
+	upCmd.PersistentFlags().BoolVar(&autoConnectDisabled, disableAutoConnectFlag, false, "Disables auto-connect feature. If enabled, then the client won't connect automatically when the service starts.")
+
+	debugCmd.PersistentFlags().BoolVarP(&debugSystemInfoFlag, systemInfoFlag, "S", false, "Adds system information to the debug bundle")
 }
 
 // SetupCloseHandler handles SIGTERM signal and exits with success
@@ -176,7 +225,7 @@ func FlagNameToEnvVar(cmdFlag string, prefix string) string {
 	return prefix + upper
 }
 
-// DialClientGRPCServer returns client connection to the dameno server.
+// DialClientGRPCServer returns client connection to the daemon server.
 func DialClientGRPCServer(ctx context.Context, addr string) (*grpc.ClientConn, error) {
 	ctx, cancel := context.WithTimeout(ctx, time.Second*3)
 	defer cancel()
@@ -207,6 +256,21 @@ var CLIBackOffSettings = &backoff.ExponentialBackOff{
 	Clock:               backoff.SystemClock,
 }
 
+func getSetupKey() (string, error) {
+	if setupKeyPath != "" && setupKey == "" {
+		return getSetupKeyFromFile(setupKeyPath)
+	}
+	return setupKey, nil
+}
+
+func getSetupKeyFromFile(setupKeyPath string) (string, error) {
+	data, err := os.ReadFile(setupKeyPath)
+	if err != nil {
+		return "", fmt.Errorf("failed to read setup key file: %v", err)
+	}
+	return strings.TrimSpace(string(data)), nil
+}
+
 func handleRebrand(cmd *cobra.Command) error {
 	var err error
 	if logFile == defaultLogFile {
@@ -316,3 +380,17 @@ func migrateToNetbird(oldPath, newPath string) bool {
 
 	return true
 }
+
+func getClient(cmd *cobra.Command) (*grpc.ClientConn, error) {
+	SetFlagsFromEnvVars(rootCmd)
+	cmd.SetOut(cmd.OutOrStdout())
+
+	conn, err := DialClientGRPCServer(cmd.Context(), daemonAddr)
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to daemon error: %v\n"+
+			"If the daemon is not running please run: "+
+			"\nnetbird service install \nnetbird service start\n", err)
+	}
+
+	return conn, nil
+}

client/cmd/root_test.go

@@ -4,6 +4,10 @@ import (
 	"fmt"
 	"io"
 	"testing"
+
+	"github.com/spf13/cobra"
+
+	"github.com/netbirdio/netbird/iface"
 )
 
 func TestInitCommands(t *testing.T) {
@@ -34,3 +38,44 @@ func TestInitCommands(t *testing.T) {
 		})
 	}
 }
+
+func TestSetFlagsFromEnvVars(t *testing.T) {
+	var cmd = &cobra.Command{
+		Use:          "netbird",
+		Long:         "test",
+		SilenceUsage: true,
+		Run: func(cmd *cobra.Command, args []string) {
+			SetFlagsFromEnvVars(cmd)
+		},
+	}
+
+	cmd.PersistentFlags().StringSliceVar(&natExternalIPs, externalIPMapFlag, nil,
+		`comma separated list of external IPs to map to the Wireguard interface`)
+	cmd.PersistentFlags().StringVar(&interfaceName, interfaceNameFlag, iface.WgInterfaceDefault, "Wireguard interface name")
+	cmd.PersistentFlags().BoolVar(&rosenpassEnabled, enableRosenpassFlag, false, "Enable Rosenpass feature Rosenpass.")
+	cmd.PersistentFlags().Uint16Var(&wireguardPort, wireguardPortFlag, iface.DefaultWgPort, "Wireguard interface listening port")
+
+	t.Setenv("NB_EXTERNAL_IP_MAP", "abc,dec")
+	t.Setenv("NB_INTERFACE_NAME", "test-name")
+	t.Setenv("NB_ENABLE_ROSENPASS", "true")
+	t.Setenv("NB_WIREGUARD_PORT", "10000")
+	err := cmd.Execute()
+	if err != nil {
+		t.Fatalf("expected no error while running netbird command, got %v", err)
+	}
+	if len(natExternalIPs) != 2 {
+		t.Errorf("expected 2 external ips, got %d", len(natExternalIPs))
+	}
+	if natExternalIPs[0] != "abc" || natExternalIPs[1] != "dec" {
+		t.Errorf("expected abc,dec, got %s,%s", natExternalIPs[0], natExternalIPs[1])
+	}
+	if interfaceName != "test-name" {
+		t.Errorf("expected test-name, got %s", interfaceName)
+	}
+	if !rosenpassEnabled {
+		t.Errorf("expected rosenpassEnabled to be true, got false")
+	}
+	if wireguardPort != 10000 {
+		t.Errorf("expected wireguardPort to be 10000, got %d", wireguardPort)
+	}
+}

client/cmd/route.go

@@ -0,0 +1,174 @@
+package cmd
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"google.golang.org/grpc/status"
+
+	"github.com/netbirdio/netbird/client/proto"
+)
+
+var appendFlag bool
+
+var routesCmd = &cobra.Command{
+	Use:   "routes",
+	Short: "Manage network routes",
+	Long:  `Commands to list, select, or deselect network routes.`,
+}
+
+var routesListCmd = &cobra.Command{
+	Use:     "list",
+	Aliases: []string{"ls"},
+	Short:   "List routes",
+	Example: "  netbird routes list",
+	Long:    "List all available network routes.",
+	RunE:    routesList,
+}
+
+var routesSelectCmd = &cobra.Command{
+	Use:     "select route...|all",
+	Short:   "Select routes",
+	Long:    "Select a list of routes by identifiers or 'all' to clear all selections and to accept all (including new) routes.\nDefault mode is replace, use -a to append to already selected routes.",
+	Example: "  netbird routes select all\n  netbird routes select route1 route2\n  netbird routes select -a route3",
+	Args:    cobra.MinimumNArgs(1),
+	RunE:    routesSelect,
+}
+
+var routesDeselectCmd = &cobra.Command{
+	Use:     "deselect route...|all",
+	Short:   "Deselect routes",
+	Long:    "Deselect previously selected routes by identifiers or 'all' to disable accepting any routes.",
+	Example: "  netbird routes deselect all\n  netbird routes deselect route1 route2",
+	Args:    cobra.MinimumNArgs(1),
+	RunE:    routesDeselect,
+}
+
+func init() {
+	routesSelectCmd.PersistentFlags().BoolVarP(&appendFlag, "append", "a", false, "Append to current route selection instead of replacing")
+}
+
+func routesList(cmd *cobra.Command, _ []string) error {
+	conn, err := getClient(cmd)
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+
+	client := proto.NewDaemonServiceClient(conn)
+	resp, err := client.ListRoutes(cmd.Context(), &proto.ListRoutesRequest{})
+	if err != nil {
+		return fmt.Errorf("failed to list routes: %v", status.Convert(err).Message())
+	}
+
+	if len(resp.Routes) == 0 {
+		cmd.Println("No routes available.")
+		return nil
+	}
+
+	printRoutes(cmd, resp)
+
+	return nil
+}
+
+func printRoutes(cmd *cobra.Command, resp *proto.ListRoutesResponse) {
+	cmd.Println("Available Routes:")
+	for _, route := range resp.Routes {
+		printRoute(cmd, route)
+	}
+}
+
+func printRoute(cmd *cobra.Command, route *proto.Route) {
+	selectedStatus := getSelectedStatus(route)
+	domains := route.GetDomains()
+
+	if len(domains) > 0 {
+		printDomainRoute(cmd, route, domains, selectedStatus)
+	} else {
+		printNetworkRoute(cmd, route, selectedStatus)
+	}
+}
+
+func getSelectedStatus(route *proto.Route) string {
+	if route.GetSelected() {
+		return "Selected"
+	}
+	return "Not Selected"
+}
+
+func printDomainRoute(cmd *cobra.Command, route *proto.Route, domains []string, selectedStatus string) {
+	cmd.Printf("\n  - ID: %s\n    Domains: %s\n    Status: %s\n", route.GetID(), strings.Join(domains, ", "), selectedStatus)
+	resolvedIPs := route.GetResolvedIPs()
+
+	if len(resolvedIPs) > 0 {
+		printResolvedIPs(cmd, domains, resolvedIPs)
+	} else {
+		cmd.Printf("    Resolved IPs: -\n")
+	}
+}
+
+func printNetworkRoute(cmd *cobra.Command, route *proto.Route, selectedStatus string) {
+	cmd.Printf("\n  - ID: %s\n    Network: %s\n    Status: %s\n", route.GetID(), route.GetNetwork(), selectedStatus)
+}
+
+func printResolvedIPs(cmd *cobra.Command, domains []string, resolvedIPs map[string]*proto.IPList) {
+	cmd.Printf("    Resolved IPs:\n")
+	for _, domain := range domains {
+		if ipList, exists := resolvedIPs[domain]; exists {
+			cmd.Printf("      [%s]: %s\n", domain, strings.Join(ipList.GetIps(), ", "))
+		}
+	}
+}
+
+func routesSelect(cmd *cobra.Command, args []string) error {
+	conn, err := getClient(cmd)
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+
+	client := proto.NewDaemonServiceClient(conn)
+	req := &proto.SelectRoutesRequest{
+		RouteIDs: args,
+	}
+
+	if len(args) == 1 && args[0] == "all" {
+		req.All = true
+	} else if appendFlag {
+		req.Append = true
+	}
+
+	if _, err := client.SelectRoutes(cmd.Context(), req); err != nil {
+		return fmt.Errorf("failed to select routes: %v", status.Convert(err).Message())
+	}
+
+	cmd.Println("Routes selected successfully.")
+
+	return nil
+}
+
+func routesDeselect(cmd *cobra.Command, args []string) error {
+	conn, err := getClient(cmd)
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+
+	client := proto.NewDaemonServiceClient(conn)
+	req := &proto.SelectRoutesRequest{
+		RouteIDs: args,
+	}
+
+	if len(args) == 1 && args[0] == "all" {
+		req.All = true
+	}
+
+	if _, err := client.DeselectRoutes(cmd.Context(), req); err != nil {
+		return fmt.Errorf("failed to deselect routes: %v", status.Convert(err).Message())
+	}
+
+	cmd.Println("Routes deselected successfully.")
+
+	return nil
+}

client/cmd/service.go

@@ -2,7 +2,6 @@ package cmd
 
 import (
 	"context"
-	"runtime"
 
 	"github.com/kardianos/service"
 	log "github.com/sirupsen/logrus"
@@ -10,12 +9,14 @@ import (
 	"google.golang.org/grpc"
 
 	"github.com/netbirdio/netbird/client/internal"
+	"github.com/netbirdio/netbird/client/server"
 )
 
 type program struct {
-	ctx    context.Context
-	cancel context.CancelFunc
-	serv   *grpc.Server
+	ctx            context.Context
+	cancel         context.CancelFunc
+	serv           *grpc.Server
+	serverInstance *server.Server
 }
 
 func newProgram(ctx context.Context, cancel context.CancelFunc) *program {
@@ -24,12 +25,8 @@ func newProgram(ctx context.Context, cancel context.CancelFunc) *program {
 }
 
 func newSVCConfig() *service.Config {
-	name := "netbird"
-	if runtime.GOOS == "windows" {
-		name = "Netbird"
-	}
 	return &service.Config{
-		Name:        name,
+		Name:        serviceName,
 		DisplayName: "Netbird",
 		Description: "A WireGuard-based mesh network that connects your devices into a single private network.",
 		Option:      make(service.KeyValue),

client/cmd/service_controller.go

@@ -11,11 +11,12 @@ import (
 	"github.com/kardianos/service"
 	log "github.com/sirupsen/logrus"
 
+	"github.com/spf13/cobra"
+	"google.golang.org/grpc"
+
 	"github.com/netbirdio/netbird/client/proto"
 	"github.com/netbirdio/netbird/client/server"
 	"github.com/netbirdio/netbird/util"
-	"github.com/spf13/cobra"
-	"google.golang.org/grpc"
 )
 
 func (p *program) Start(svc service.Service) error {
@@ -60,6 +61,8 @@ func (p *program) Start(svc service.Service) error {
 		}
 		proto.RegisterDaemonServiceServer(p.serv, serverInstance)
 
+		p.serverInstance = serverInstance
+
 		log.Printf("started daemon server: %v", split[1])
 		if err := p.serv.Serve(listen); err != nil {
 			log.Errorf("failed to serve daemon requests: %v", err)
@@ -69,6 +72,14 @@ func (p *program) Start(svc service.Service) error {
 }
 
 func (p *program) Stop(srv service.Service) error {
+	if p.serverInstance != nil {
+		in := new(proto.DownRequest)
+		_, err := p.serverInstance.Down(p.ctx, in)
+		if err != nil {
+			log.Errorf("failed to stop daemon: %v", err)
+		}
+	}
+
 	p.cancel()
 
 	if p.serv != nil {
@@ -109,7 +120,6 @@ var runCmd = &cobra.Command{
 		if err != nil {
 			return err
 		}
-		cmd.Printf("Netbird service is running")
 		return nil
 	},
 }

client/cmd/service_installer.go

@@ -31,6 +31,8 @@ var installCmd = &cobra.Command{
 			configPath,
 			"--log-level",
 			logLevel,
+			"--daemon-addr",
+			daemonAddr,
 		}
 
 		if managementURL != "" {
@@ -64,6 +66,10 @@ var installCmd = &cobra.Command{
 			}
 		}
 
+		if runtime.GOOS == "windows" {
+			svcConfig.Option["OnFailure"] = "restart"
+		}
+
 		ctx, cancel := context.WithCancel(cmd.Context())
 
 		s, err := newSVC(newProgram(ctx, cancel), svcConfig)
@@ -77,6 +83,7 @@ var installCmd = &cobra.Command{
 			cmd.PrintErrln(err)
 			return err
 		}
+
 		cmd.Println("Netbird service has been installed")
 		return nil
 	},
@@ -106,7 +113,7 @@ var uninstallCmd = &cobra.Command{
 		if err != nil {
 			return err
 		}
-		cmd.Println("Netbird has been uninstalled")
+		cmd.Println("Netbird service has been uninstalled")
 		return nil
 	},
 }

client/cmd/ssh.go

@@ -24,7 +24,7 @@ var (
 )
 
 var sshCmd = &cobra.Command{
-	Use: "ssh",
+	Use: "ssh [user@]host",
 	Args: func(cmd *cobra.Command, args []string) error {
 		if len(args) < 1 {
 			return errors.New("requires a host argument")
@@ -94,7 +94,7 @@ func runSSH(ctx context.Context, addr string, pemKey []byte, cmd *cobra.Command)
 	if err != nil {
 		cmd.Printf("Error: %v\n", err)
 		cmd.Printf("Couldn't connect. Please check the connection status or if the ssh server is enabled on the other peer" +
-			"You can verify the connection by running:\n\n" +
+			"\nYou can verify the connection by running:\n\n" +
 			" netbird status\n\n")
 		return err
 	}

client/cmd/status.go

@@ -6,6 +6,8 @@ import (
 	"fmt"
 	"net"
 	"net/netip"
+	"os"
+	"runtime"
 	"sort"
 	"strings"
 	"time"
@@ -14,6 +16,7 @@ import (
 	"google.golang.org/grpc/status"
 	"gopkg.in/yaml.v3"
 
+	"github.com/netbirdio/netbird/client/anonymize"
 	"github.com/netbirdio/netbird/client/internal"
 	"github.com/netbirdio/netbird/client/internal/peer"
 	"github.com/netbirdio/netbird/client/proto"
@@ -28,12 +31,15 @@ type peerStateDetailOutput struct {
 	Status                 string           `json:"status" yaml:"status"`
 	LastStatusUpdate       time.Time        `json:"lastStatusUpdate" yaml:"lastStatusUpdate"`
 	ConnType               string           `json:"connectionType" yaml:"connectionType"`
-	Direct                 bool             `json:"direct" yaml:"direct"`
 	IceCandidateType       iceCandidateType `json:"iceCandidateType" yaml:"iceCandidateType"`
 	IceCandidateEndpoint   iceCandidateType `json:"iceCandidateEndpoint" yaml:"iceCandidateEndpoint"`
+	RelayAddress           string           `json:"relayAddress" yaml:"relayAddress"`
 	LastWireguardHandshake time.Time        `json:"lastWireguardHandshake" yaml:"lastWireguardHandshake"`
 	TransferReceived       int64            `json:"transferReceived" yaml:"transferReceived"`
 	TransferSent           int64            `json:"transferSent" yaml:"transferSent"`
+	Latency                time.Duration    `json:"latency" yaml:"latency"`
+	RosenpassEnabled       bool             `json:"quantumResistance" yaml:"quantumResistance"`
+	Routes                 []string         `json:"routes" yaml:"routes"`
 }
 
 type peersStateOutput struct {
@@ -71,17 +77,28 @@ type iceCandidateType struct {
 	Remote string `json:"remote" yaml:"remote"`
 }
 
+type nsServerGroupStateOutput struct {
+	Servers []string `json:"servers" yaml:"servers"`
+	Domains []string `json:"domains" yaml:"domains"`
+	Enabled bool     `json:"enabled" yaml:"enabled"`
+	Error   string   `json:"error" yaml:"error"`
+}
+
 type statusOutputOverview struct {
-	Peers           peersStateOutput      `json:"peers" yaml:"peers"`
-	CliVersion      string                `json:"cliVersion" yaml:"cliVersion"`
-	DaemonVersion   string                `json:"daemonVersion" yaml:"daemonVersion"`
-	ManagementState managementStateOutput `json:"management" yaml:"management"`
-	SignalState     signalStateOutput     `json:"signal" yaml:"signal"`
-	Relays          relayStateOutput      `json:"relays" yaml:"relays"`
-	IP              string                `json:"netbirdIp" yaml:"netbirdIp"`
-	PubKey          string                `json:"publicKey" yaml:"publicKey"`
-	KernelInterface bool                  `json:"usesKernelInterface" yaml:"usesKernelInterface"`
-	FQDN            string                `json:"fqdn" yaml:"fqdn"`
+	Peers               peersStateOutput           `json:"peers" yaml:"peers"`
+	CliVersion          string                     `json:"cliVersion" yaml:"cliVersion"`
+	DaemonVersion       string                     `json:"daemonVersion" yaml:"daemonVersion"`
+	ManagementState     managementStateOutput      `json:"management" yaml:"management"`
+	SignalState         signalStateOutput          `json:"signal" yaml:"signal"`
+	Relays              relayStateOutput           `json:"relays" yaml:"relays"`
+	IP                  string                     `json:"netbirdIp" yaml:"netbirdIp"`
+	PubKey              string                     `json:"publicKey" yaml:"publicKey"`
+	KernelInterface     bool                       `json:"usesKernelInterface" yaml:"usesKernelInterface"`
+	FQDN                string                     `json:"fqdn" yaml:"fqdn"`
+	RosenpassEnabled    bool                       `json:"quantumResistance" yaml:"quantumResistance"`
+	RosenpassPermissive bool                       `json:"quantumResistancePermissive" yaml:"quantumResistancePermissive"`
+	Routes              []string                   `json:"routes" yaml:"routes"`
+	NSServerGroups      []nsServerGroupStateOutput `json:"dnsServers" yaml:"dnsServers"`
 }
 
 var (
@@ -130,9 +147,9 @@ func statusFunc(cmd *cobra.Command, args []string) error {
 		return fmt.Errorf("failed initializing log %v", err)
 	}
 
-	ctx := internal.CtxInitState(context.Background())
+	ctx := internal.CtxInitState(cmd.Context())
 
-	resp, err := getStatus(ctx, cmd)
+	resp, err := getStatus(ctx)
 	if err != nil {
 		return err
 	}
@@ -165,7 +182,7 @@ func statusFunc(cmd *cobra.Command, args []string) error {
 	case yamlFlag:
 		statusOutputString, err = parseToYAML(outputInformationHolder)
 	default:
-		statusOutputString = parseGeneralSummary(outputInformationHolder, false, false)
+		statusOutputString = parseGeneralSummary(outputInformationHolder, false, false, false)
 	}
 
 	if err != nil {
@@ -177,7 +194,7 @@ func statusFunc(cmd *cobra.Command, args []string) error {
 	return nil
 }
 
-func getStatus(ctx context.Context, cmd *cobra.Command) (*proto.StatusResponse, error) {
+func getStatus(ctx context.Context) (*proto.StatusResponse, error) {
 	conn, err := DialClientGRPCServer(ctx, daemonAddr)
 	if err != nil {
 		return nil, fmt.Errorf("failed to connect to daemon error: %v\n"+
@@ -186,7 +203,7 @@ func getStatus(ctx context.Context, cmd *cobra.Command) (*proto.StatusResponse,
 	}
 	defer conn.Close()
 
-	resp, err := proto.NewDaemonServiceClient(conn).Status(cmd.Context(), &proto.StatusRequest{GetFullPeerStatus: true})
+	resp, err := proto.NewDaemonServiceClient(conn).Status(ctx, &proto.StatusRequest{GetFullPeerStatus: true})
 	if err != nil {
 		return nil, fmt.Errorf("status failed: %v", status.Convert(err).Message())
 	}
@@ -253,16 +270,25 @@ func convertToStatusOutputOverview(resp *proto.StatusResponse) statusOutputOverv
 	peersOverview := mapPeers(resp.GetFullStatus().GetPeers())
 
 	overview := statusOutputOverview{
-		Peers:           peersOverview,
-		CliVersion:      version.NetbirdVersion(),
-		DaemonVersion:   resp.GetDaemonVersion(),
-		ManagementState: managementOverview,
-		SignalState:     signalOverview,
-		Relays:          relayOverview,
-		IP:              pbFullStatus.GetLocalPeerState().GetIP(),
-		PubKey:          pbFullStatus.GetLocalPeerState().GetPubKey(),
-		KernelInterface: pbFullStatus.GetLocalPeerState().GetKernelInterface(),
-		FQDN:            pbFullStatus.GetLocalPeerState().GetFqdn(),
+		Peers:               peersOverview,
+		CliVersion:          version.NetbirdVersion(),
+		DaemonVersion:       resp.GetDaemonVersion(),
+		ManagementState:     managementOverview,
+		SignalState:         signalOverview,
+		Relays:              relayOverview,
+		IP:                  pbFullStatus.GetLocalPeerState().GetIP(),
+		PubKey:              pbFullStatus.GetLocalPeerState().GetPubKey(),
+		KernelInterface:     pbFullStatus.GetLocalPeerState().GetKernelInterface(),
+		FQDN:                pbFullStatus.GetLocalPeerState().GetFqdn(),
+		RosenpassEnabled:    pbFullStatus.GetLocalPeerState().GetRosenpassEnabled(),
+		RosenpassPermissive: pbFullStatus.GetLocalPeerState().GetRosenpassPermissive(),
+		Routes:              pbFullStatus.GetLocalPeerState().GetRoutes(),
+		NSServerGroups:      mapNSGroups(pbFullStatus.GetDnsServers()),
+	}
+
+	if anonymizeFlag {
+		anonymizer := anonymize.NewAnonymizer(anonymize.DefaultAddresses())
+		anonymizeOverview(anonymizer, &overview)
 	}
 
 	return overview
@@ -294,18 +320,33 @@ func mapRelays(relays []*proto.RelayState) relayStateOutput {
 	}
 }
 
+func mapNSGroups(servers []*proto.NSGroupState) []nsServerGroupStateOutput {
+	mappedNSGroups := make([]nsServerGroupStateOutput, 0, len(servers))
+	for _, pbNsGroupServer := range servers {
+		mappedNSGroups = append(mappedNSGroups, nsServerGroupStateOutput{
+			Servers: pbNsGroupServer.GetServers(),
+			Domains: pbNsGroupServer.GetDomains(),
+			Enabled: pbNsGroupServer.GetEnabled(),
+			Error:   pbNsGroupServer.GetError(),
+		})
+	}
+	return mappedNSGroups
+}
+
 func mapPeers(peers []*proto.PeerState) peersStateOutput {
 	var peersStateDetail []peerStateDetailOutput
-	localICE := ""
-	remoteICE := ""
-	localICEEndpoint := ""
-	remoteICEEndpoint := ""
-	connType := ""
 	peersConnected := 0
-	lastHandshake := time.Time{}
-	transferReceived := int64(0)
-	transferSent := int64(0)
 	for _, pbPeerState := range peers {
+		localICE := ""
+		remoteICE := ""
+		localICEEndpoint := ""
+		remoteICEEndpoint := ""
+		relayServerAddress := ""
+		connType := ""
+		lastHandshake := time.Time{}
+		transferReceived := int64(0)
+		transferSent := int64(0)
+
 		isPeerConnected := pbPeerState.ConnStatus == peer.StatusConnected.String()
 		if skipDetailByFilters(pbPeerState, isPeerConnected) {
 			continue
@@ -321,6 +362,7 @@ func mapPeers(peers []*proto.PeerState) peersStateOutput {
 			if pbPeerState.Relayed {
 				connType = "Relayed"
 			}
+			relayServerAddress = pbPeerState.GetRelayAddress()
 			lastHandshake = pbPeerState.GetLastWireguardHandshake().AsTime().Local()
 			transferReceived = pbPeerState.GetBytesRx()
 			transferSent = pbPeerState.GetBytesTx()
@@ -333,7 +375,6 @@ func mapPeers(peers []*proto.PeerState) peersStateOutput {
 			Status:           pbPeerState.GetConnStatus(),
 			LastStatusUpdate: timeLocal,
 			ConnType:         connType,
-			Direct:           pbPeerState.GetDirect(),
 			IceCandidateType: iceCandidateType{
 				Local:  localICE,
 				Remote: remoteICE,
@@ -342,10 +383,14 @@ func mapPeers(peers []*proto.PeerState) peersStateOutput {
 				Local:  localICEEndpoint,
 				Remote: remoteICEEndpoint,
 			},
+			RelayAddress:           relayServerAddress,
 			FQDN:                   pbPeerState.GetFqdn(),
 			LastWireguardHandshake: lastHandshake,
 			TransferReceived:       transferReceived,
 			TransferSent:           transferSent,
+			Latency:                pbPeerState.GetLatency().AsDuration(),
+			RosenpassEnabled:       pbPeerState.GetRosenpassEnabled(),
+			Routes:                 pbPeerState.GetRoutes(),
 		}
 
 		peersStateDetail = append(peersStateDetail, peerState)
@@ -395,8 +440,7 @@ func parseToYAML(overview statusOutputOverview) (string, error) {
 	return string(yamlBytes), nil
 }
 
-func parseGeneralSummary(overview statusOutputOverview, showURL bool, showRelays bool) string {
-
+func parseGeneralSummary(overview statusOutputOverview, showURL bool, showRelays bool, showNameServers bool) string {
 	var managementConnString string
 	if overview.ManagementState.Connected {
 		managementConnString = "Connected"
@@ -432,7 +476,7 @@ func parseGeneralSummary(overview statusOutputOverview, showURL bool, showRelays
 		interfaceIP = "N/A"
 	}
 
-	var relayAvailableString string
+	var relaysString string
 	if showRelays {
 		for _, relay := range overview.Relays.Details {
 			available := "Available"
@@ -441,42 +485,98 @@ func parseGeneralSummary(overview statusOutputOverview, showURL bool, showRelays
 				available = "Unavailable"
 				reason = fmt.Sprintf(", reason: %s", relay.Error)
 			}
-			relayAvailableString += fmt.Sprintf("\n  [%s] is %s%s", relay.URI, available, reason)
-
+			relaysString += fmt.Sprintf("\n  [%s] is %s%s", relay.URI, available, reason)
 		}
 	} else {
+		relaysString = fmt.Sprintf("%d/%d Available", overview.Relays.Available, overview.Relays.Total)
+	}
 
-		relayAvailableString = fmt.Sprintf("%d/%d Available", overview.Relays.Available, overview.Relays.Total)
+	routes := "-"
+	if len(overview.Routes) > 0 {
+		sort.Strings(overview.Routes)
+		routes = strings.Join(overview.Routes, ", ")
+	}
+
+	var dnsServersString string
+	if showNameServers {
+		for _, nsServerGroup := range overview.NSServerGroups {
+			enabled := "Available"
+			if !nsServerGroup.Enabled {
+				enabled = "Unavailable"
+			}
+			errorString := ""
+			if nsServerGroup.Error != "" {
+				errorString = fmt.Sprintf(", reason: %s", nsServerGroup.Error)
+				errorString = strings.TrimSpace(errorString)
+			}
+
+			domainsString := strings.Join(nsServerGroup.Domains, ", ")
+			if domainsString == "" {
+				domainsString = "." // Show "." for the default zone
+			}
+			dnsServersString += fmt.Sprintf(
+				"\n  [%s] for [%s] is %s%s",
+				strings.Join(nsServerGroup.Servers, ", "),
+				domainsString,
+				enabled,
+				errorString,
+			)
+		}
+	} else {
+		dnsServersString = fmt.Sprintf("%d/%d Available", countEnabled(overview.NSServerGroups), len(overview.NSServerGroups))
+	}
+
+	rosenpassEnabledStatus := "false"
+	if overview.RosenpassEnabled {
+		rosenpassEnabledStatus = "true"
+		if overview.RosenpassPermissive {
+			rosenpassEnabledStatus = "true (permissive)" //nolint:gosec
+		}
 	}
 
 	peersCountString := fmt.Sprintf("%d/%d Connected", overview.Peers.Connected, overview.Peers.Total)
 
+	goos := runtime.GOOS
+	goarch := runtime.GOARCH
+	goarm := ""
+	if goarch == "arm" {
+		goarm = fmt.Sprintf(" (ARMv%s)", os.Getenv("GOARM"))
+	}
+
 	summary := fmt.Sprintf(
-		"Daemon version: %s\n"+
+		"OS: %s\n"+
+			"Daemon version: %s\n"+
 			"CLI version: %s\n"+
 			"Management: %s\n"+
 			"Signal: %s\n"+
 			"Relays: %s\n"+
+			"Nameservers: %s\n"+
 			"FQDN: %s\n"+
 			"NetBird IP: %s\n"+
 			"Interface type: %s\n"+
+			"Quantum resistance: %s\n"+
+			"Routes: %s\n"+
 			"Peers count: %s\n",
+		fmt.Sprintf("%s/%s%s", goos, goarch, goarm),
 		overview.DaemonVersion,
 		version.NetbirdVersion(),
 		managementConnString,
 		signalConnString,
-		relayAvailableString,
+		relaysString,
+		dnsServersString,
 		overview.FQDN,
 		interfaceIP,
 		interfaceTypeString,
+		rosenpassEnabledStatus,
+		routes,
 		peersCountString,
 	)
 	return summary
 }
 
 func parseToFullDetailSummary(overview statusOutputOverview) string {
-	parsedPeersString := parsePeers(overview.Peers)
-	summary := parseGeneralSummary(overview, true, true)
+	parsedPeersString := parsePeers(overview.Peers, overview.RosenpassEnabled, overview.RosenpassPermissive)
+	summary := parseGeneralSummary(overview, true, true, true)
 
 	return fmt.Sprintf(
 		"Peers detail:"+
@@ -487,7 +587,7 @@ func parseToFullDetailSummary(overview statusOutputOverview) string {
 	)
 }
 
-func parsePeers(peers peersStateOutput) string {
+func parsePeers(peers peersStateOutput, rosenpassEnabled, rosenpassPermissive bool) string {
 	var (
 		peersString = ""
 	)
@@ -513,14 +613,28 @@ func parsePeers(peers peersStateOutput) string {
 		if peerState.IceCandidateEndpoint.Remote != "" {
 			remoteICEEndpoint = peerState.IceCandidateEndpoint.Remote
 		}
-		lastStatusUpdate := "-"
-		if !peerState.LastStatusUpdate.IsZero() {
-			lastStatusUpdate = peerState.LastStatusUpdate.Format("2006-01-02 15:04:05")
+
+		rosenpassEnabledStatus := "false"
+		if rosenpassEnabled {
+			if peerState.RosenpassEnabled {
+				rosenpassEnabledStatus = "true"
+			} else {
+				if rosenpassPermissive {
+					rosenpassEnabledStatus = "false (remote didn't enable quantum resistance)"
+				} else {
+					rosenpassEnabledStatus = "false (connection won't work without a permissive mode)"
+				}
+			}
+		} else {
+			if peerState.RosenpassEnabled {
+				rosenpassEnabledStatus = "false (connection might not work without a remote permissive mode)"
+			}
 		}
 
-		lastWireguardHandshake := "-"
-		if !peerState.LastWireguardHandshake.IsZero() && peerState.LastWireguardHandshake != time.Unix(0, 0) {
-			lastWireguardHandshake = peerState.LastWireguardHandshake.Format("2006-01-02 15:04:05")
+		routes := "-"
+		if len(peerState.Routes) > 0 {
+			sort.Strings(peerState.Routes)
+			routes = strings.Join(peerState.Routes, ", ")
 		}
 
 		peerString := fmt.Sprintf(
@@ -530,26 +644,32 @@ func parsePeers(peers peersStateOutput) string {
 				"  Status: %s\n"+
 				"  -- detail --\n"+
 				"  Connection type: %s\n"+
-				"  Direct: %t\n"+
 				"  ICE candidate (Local/Remote): %s/%s\n"+
 				"  ICE candidate endpoints (Local/Remote): %s/%s\n"+
+				"  Relay server address: %s\n"+
 				"  Last connection update: %s\n"+
-				"  Last Wireguard handshake: %s\n"+
-				"  Transfer status (received/sent) %s/%s\n",
+				"  Last WireGuard handshake: %s\n"+
+				"  Transfer status (received/sent) %s/%s\n"+
+				"  Quantum resistance: %s\n"+
+				"  Routes: %s\n"+
+				"  Latency: %s\n",
 			peerState.FQDN,
 			peerState.IP,
 			peerState.PubKey,
 			peerState.Status,
 			peerState.ConnType,
-			peerState.Direct,
 			localICE,
 			remoteICE,
 			localICEEndpoint,
 			remoteICEEndpoint,
-			lastStatusUpdate,
-			lastWireguardHandshake,
+			peerState.RelayAddress,
+			timeAgo(peerState.LastStatusUpdate),
+			timeAgo(peerState.LastWireguardHandshake),
 			toIEC(peerState.TransferReceived),
 			toIEC(peerState.TransferSent),
+			rosenpassEnabledStatus,
+			routes,
+			peerState.Latency.String(),
 		)
 
 		peersString += peerString
@@ -603,3 +723,131 @@ func toIEC(b int64) string {
 	return fmt.Sprintf("%.1f %ciB",
 		float64(b)/float64(div), "KMGTPE"[exp])
 }
+
+func countEnabled(dnsServers []nsServerGroupStateOutput) int {
+	count := 0
+	for _, server := range dnsServers {
+		if server.Enabled {
+			count++
+		}
+	}
+	return count
+}
+
+// timeAgo returns a string representing the duration since the provided time in a human-readable format.
+func timeAgo(t time.Time) string {
+	if t.IsZero() || t.Equal(time.Unix(0, 0)) {
+		return "-"
+	}
+	duration := time.Since(t)
+	switch {
+	case duration < time.Second:
+		return "Now"
+	case duration < time.Minute:
+		seconds := int(duration.Seconds())
+		if seconds == 1 {
+			return "1 second ago"
+		}
+		return fmt.Sprintf("%d seconds ago", seconds)
+	case duration < time.Hour:
+		minutes := int(duration.Minutes())
+		seconds := int(duration.Seconds()) % 60
+		if minutes == 1 {
+			if seconds == 1 {
+				return "1 minute, 1 second ago"
+			} else if seconds > 0 {
+				return fmt.Sprintf("1 minute, %d seconds ago", seconds)
+			}
+			return "1 minute ago"
+		}
+		if seconds > 0 {
+			return fmt.Sprintf("%d minutes, %d seconds ago", minutes, seconds)
+		}
+		return fmt.Sprintf("%d minutes ago", minutes)
+	case duration < 24*time.Hour:
+		hours := int(duration.Hours())
+		minutes := int(duration.Minutes()) % 60
+		if hours == 1 {
+			if minutes == 1 {
+				return "1 hour, 1 minute ago"
+			} else if minutes > 0 {
+				return fmt.Sprintf("1 hour, %d minutes ago", minutes)
+			}
+			return "1 hour ago"
+		}
+		if minutes > 0 {
+			return fmt.Sprintf("%d hours, %d minutes ago", hours, minutes)
+		}
+		return fmt.Sprintf("%d hours ago", hours)
+	}
+
+	days := int(duration.Hours()) / 24
+	hours := int(duration.Hours()) % 24
+	if days == 1 {
+		if hours == 1 {
+			return "1 day, 1 hour ago"
+		} else if hours > 0 {
+			return fmt.Sprintf("1 day, %d hours ago", hours)
+		}
+		return "1 day ago"
+	}
+	if hours > 0 {
+		return fmt.Sprintf("%d days, %d hours ago", days, hours)
+	}
+	return fmt.Sprintf("%d days ago", days)
+}
+
+func anonymizePeerDetail(a *anonymize.Anonymizer, peer *peerStateDetailOutput) {
+	peer.FQDN = a.AnonymizeDomain(peer.FQDN)
+	if localIP, port, err := net.SplitHostPort(peer.IceCandidateEndpoint.Local); err == nil {
+		peer.IceCandidateEndpoint.Local = fmt.Sprintf("%s:%s", a.AnonymizeIPString(localIP), port)
+	}
+	if remoteIP, port, err := net.SplitHostPort(peer.IceCandidateEndpoint.Remote); err == nil {
+		peer.IceCandidateEndpoint.Remote = fmt.Sprintf("%s:%s", a.AnonymizeIPString(remoteIP), port)
+	}
+	for i, route := range peer.Routes {
+		peer.Routes[i] = a.AnonymizeIPString(route)
+	}
+
+	for i, route := range peer.Routes {
+		peer.Routes[i] = a.AnonymizeRoute(route)
+	}
+}
+
+func anonymizeOverview(a *anonymize.Anonymizer, overview *statusOutputOverview) {
+	for i, peer := range overview.Peers.Details {
+		peer := peer
+		anonymizePeerDetail(a, &peer)
+		overview.Peers.Details[i] = peer
+	}
+
+	overview.ManagementState.URL = a.AnonymizeURI(overview.ManagementState.URL)
+	overview.ManagementState.Error = a.AnonymizeString(overview.ManagementState.Error)
+	overview.SignalState.URL = a.AnonymizeURI(overview.SignalState.URL)
+	overview.SignalState.Error = a.AnonymizeString(overview.SignalState.Error)
+
+	overview.IP = a.AnonymizeIPString(overview.IP)
+	for i, detail := range overview.Relays.Details {
+		detail.URI = a.AnonymizeURI(detail.URI)
+		detail.Error = a.AnonymizeString(detail.Error)
+		overview.Relays.Details[i] = detail
+	}
+
+	for i, nsGroup := range overview.NSServerGroups {
+		for j, domain := range nsGroup.Domains {
+			overview.NSServerGroups[i].Domains[j] = a.AnonymizeDomain(domain)
+		}
+		for j, ns := range nsGroup.Servers {
+			host, port, err := net.SplitHostPort(ns)
+			if err == nil {
+				overview.NSServerGroups[i].Servers[j] = fmt.Sprintf("%s:%s", a.AnonymizeIPString(host), port)
+			}
+		}
+	}
+
+	for i, route := range overview.Routes {
+		overview.Routes[i] = a.AnonymizeRoute(route)
+	}
+
+	overview.FQDN = a.AnonymizeDomain(overview.FQDN)
+}

client/cmd/status_test.go

@@ -3,11 +3,14 @@ package cmd
 import (
 	"bytes"
 	"encoding/json"
+	"fmt"
+	"runtime"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"google.golang.org/protobuf/types/known/durationpb"
 	"google.golang.org/protobuf/types/known/timestamppb"
 
 	"github.com/netbirdio/netbird/client/proto"
@@ -34,7 +37,6 @@ var resp = &proto.StatusResponse{
 				ConnStatus:                 "Connected",
 				ConnStatusUpdate:           timestamppb.New(time.Date(2001, time.Month(1), 1, 1, 1, 1, 0, time.UTC)),
 				Relayed:                    false,
-				Direct:                     true,
 				LocalIceCandidateType:      "",
 				RemoteIceCandidateType:     "",
 				LocalIceCandidateEndpoint:  "",
@@ -42,6 +44,10 @@ var resp = &proto.StatusResponse{
 				LastWireguardHandshake:     timestamppb.New(time.Date(2001, time.Month(1), 1, 1, 1, 2, 0, time.UTC)),
 				BytesRx:                    200,
 				BytesTx:                    100,
+				Routes: []string{
+					"10.1.0.0/24",
+				},
+				Latency: durationpb.New(time.Duration(10000000)),
 			},
 			{
 				IP:                         "192.168.178.102",
@@ -50,7 +56,6 @@ var resp = &proto.StatusResponse{
 				ConnStatus:                 "Connected",
 				ConnStatusUpdate:           timestamppb.New(time.Date(2002, time.Month(2), 2, 2, 2, 2, 0, time.UTC)),
 				Relayed:                    true,
-				Direct:                     false,
 				LocalIceCandidateType:      "relay",
 				RemoteIceCandidateType:     "prflx",
 				LocalIceCandidateEndpoint:  "10.0.0.1:10001",
@@ -58,6 +63,7 @@ var resp = &proto.StatusResponse{
 				LastWireguardHandshake:     timestamppb.New(time.Date(2002, time.Month(2), 2, 2, 2, 3, 0, time.UTC)),
 				BytesRx:                    2000,
 				BytesTx:                    1000,
+				Latency:                    durationpb.New(time.Duration(10000000)),
 			},
 		},
 		ManagementState: &proto.ManagementState{
@@ -87,6 +93,31 @@ var resp = &proto.StatusResponse{
 			PubKey:          "Some-Pub-Key",
 			KernelInterface: true,
 			Fqdn:            "some-localhost.awesome-domain.com",
+			Routes: []string{
+				"10.10.0.0/24",
+			},
+		},
+		DnsServers: []*proto.NSGroupState{
+			{
+				Servers: []string{
+					"8.8.8.8:53",
+				},
+				Domains: nil,
+				Enabled: true,
+				Error:   "",
+			},
+			{
+				Servers: []string{
+					"1.1.1.1:53",
+					"2.2.2.2:53",
+				},
+				Domains: []string{
+					"example.com",
+					"example.net",
+				},
+				Enabled: false,
+				Error:   "timeout",
+			},
 		},
 	},
 	DaemonVersion: "0.14.1",
@@ -104,7 +135,6 @@ var overview = statusOutputOverview{
 				Status:           "Connected",
 				LastStatusUpdate: time.Date(2001, 1, 1, 1, 1, 1, 0, time.UTC),
 				ConnType:         "P2P",
-				Direct:           true,
 				IceCandidateType: iceCandidateType{
 					Local:  "",
 					Remote: "",
@@ -116,6 +146,10 @@ var overview = statusOutputOverview{
 				LastWireguardHandshake: time.Date(2001, 1, 1, 1, 1, 2, 0, time.UTC),
 				TransferReceived:       200,
 				TransferSent:           100,
+				Routes: []string{
+					"10.1.0.0/24",
+				},
+				Latency: time.Duration(10000000),
 			},
 			{
 				IP:               "192.168.178.102",
@@ -124,7 +158,6 @@ var overview = statusOutputOverview{
 				Status:           "Connected",
 				LastStatusUpdate: time.Date(2002, 2, 2, 2, 2, 2, 0, time.UTC),
 				ConnType:         "Relayed",
-				Direct:           false,
 				IceCandidateType: iceCandidateType{
 					Local:  "relay",
 					Remote: "prflx",
@@ -136,6 +169,7 @@ var overview = statusOutputOverview{
 				LastWireguardHandshake: time.Date(2002, 2, 2, 2, 2, 3, 0, time.UTC),
 				TransferReceived:       2000,
 				TransferSent:           1000,
+				Latency:                time.Duration(10000000),
 			},
 		},
 	},
@@ -171,6 +205,31 @@ var overview = statusOutputOverview{
 	PubKey:          "Some-Pub-Key",
 	KernelInterface: true,
 	FQDN:            "some-localhost.awesome-domain.com",
+	NSServerGroups: []nsServerGroupStateOutput{
+		{
+			Servers: []string{
+				"8.8.8.8:53",
+			},
+			Domains: nil,
+			Enabled: true,
+			Error:   "",
+		},
+		{
+			Servers: []string{
+				"1.1.1.1:53",
+				"2.2.2.2:53",
+			},
+			Domains: []string{
+				"example.com",
+				"example.net",
+			},
+			Enabled: false,
+			Error:   "timeout",
+		},
+	},
+	Routes: []string{
+		"10.10.0.0/24",
+	},
 }
 
 func TestConversionFromFullStatusToOutputOverview(t *testing.T) {
@@ -220,7 +279,6 @@ func TestParsingToJSON(t *testing.T) {
                 "status": "Connected",
                 "lastStatusUpdate": "2001-01-01T01:01:01Z",
                 "connectionType": "P2P",
-                "direct": true,
                 "iceCandidateType": {
                   "local": "",
                   "remote": ""
@@ -229,9 +287,15 @@ func TestParsingToJSON(t *testing.T) {
                   "local": "",
                   "remote": ""
                 },
+				"relayAddress": "",
                 "lastWireguardHandshake": "2001-01-01T01:01:02Z",
                 "transferReceived": 200,
-                "transferSent": 100
+                "transferSent": 100,
+				"latency": 10000000,
+                "quantumResistance": false,
+                "routes": [
+                  "10.1.0.0/24"
+                ]
               },
               {
                 "fqdn": "peer-2.awesome-domain.com",
@@ -240,7 +304,6 @@ func TestParsingToJSON(t *testing.T) {
                 "status": "Connected",
                 "lastStatusUpdate": "2002-02-02T02:02:02Z",
                 "connectionType": "Relayed",
-                "direct": false,
                 "iceCandidateType": {
                   "local": "relay",
                   "remote": "prflx"
@@ -249,9 +312,13 @@ func TestParsingToJSON(t *testing.T) {
                   "local": "10.0.0.1:10001",
                   "remote": "10.0.10.1:10002"
                 },
+				"relayAddress": "",
                 "lastWireguardHandshake": "2002-02-02T02:02:03Z",
                 "transferReceived": 2000,
-                "transferSent": 1000
+                "transferSent": 1000,
+				"latency": 10000000,
+                "quantumResistance": false,
+                "routes": null
               }
             ]
           },
@@ -286,7 +353,34 @@ func TestParsingToJSON(t *testing.T) {
           "netbirdIp": "192.168.178.100/16",
           "publicKey": "Some-Pub-Key",
           "usesKernelInterface": true,
-          "fqdn": "some-localhost.awesome-domain.com"
+          "fqdn": "some-localhost.awesome-domain.com",
+          "quantumResistance": false,
+          "quantumResistancePermissive": false,
+          "routes": [
+            "10.10.0.0/24"
+          ],
+          "dnsServers": [
+            {
+              "servers": [
+                "8.8.8.8:53"
+              ],
+              "domains": null,
+              "enabled": true,
+              "error": ""
+            },
+            {
+              "servers": [
+                "1.1.1.1:53",
+                "2.2.2.2:53"
+              ],
+              "domains": [
+                "example.com",
+                "example.net"
+              ],
+              "enabled": false,
+              "error": "timeout"
+            }
+          ]
         }`
 	// @formatter:on
 
@@ -310,32 +404,39 @@ func TestParsingToYAML(t *testing.T) {
           status: Connected
           lastStatusUpdate: 2001-01-01T01:01:01Z
           connectionType: P2P
-          direct: true
           iceCandidateType:
             local: ""
             remote: ""
           iceCandidateEndpoint:
             local: ""
             remote: ""
+          relayAddress: ""
           lastWireguardHandshake: 2001-01-01T01:01:02Z
           transferReceived: 200
           transferSent: 100
+          latency: 10ms
+          quantumResistance: false
+          routes:
+            - 10.1.0.0/24
         - fqdn: peer-2.awesome-domain.com
           netbirdIp: 192.168.178.102
           publicKey: Pubkey2
           status: Connected
           lastStatusUpdate: 2002-02-02T02:02:02Z
           connectionType: Relayed
-          direct: false
           iceCandidateType:
             local: relay
             remote: prflx
           iceCandidateEndpoint:
             local: 10.0.0.1:10001
             remote: 10.0.10.1:10002
+          relayAddress: ""
           lastWireguardHandshake: 2002-02-02T02:02:03Z
           transferReceived: 2000
           transferSent: 1000
+          latency: 10ms
+          quantumResistance: false
+          routes: []
 cliVersion: development
 daemonVersion: 0.14.1
 management:
@@ -360,15 +461,39 @@ netbirdIp: 192.168.178.100/16
 publicKey: Some-Pub-Key
 usesKernelInterface: true
 fqdn: some-localhost.awesome-domain.com
+quantumResistance: false
+quantumResistancePermissive: false
+routes:
+    - 10.10.0.0/24
+dnsServers:
+    - servers:
+        - 8.8.8.8:53
+      domains: []
+      enabled: true
+      error: ""
+    - servers:
+        - 1.1.1.1:53
+        - 2.2.2.2:53
+      domains:
+        - example.com
+        - example.net
+      enabled: false
+      error: timeout
 `
 
 	assert.Equal(t, expectedYAML, yaml)
 }
 
 func TestParsingToDetail(t *testing.T) {
+	// Calculate time ago based on the fixture dates
+	lastConnectionUpdate1 := timeAgo(overview.Peers.Details[0].LastStatusUpdate)
+	lastHandshake1 := timeAgo(overview.Peers.Details[0].LastWireguardHandshake)
+	lastConnectionUpdate2 := timeAgo(overview.Peers.Details[1].LastStatusUpdate)
+	lastHandshake2 := timeAgo(overview.Peers.Details[1].LastWireguardHandshake)
+
 	detail := parseToFullDetailSummary(overview)
 
-	expectedDetail :=
+	expectedDetail := fmt.Sprintf(
 		`Peers detail:
  peer-1.awesome-domain.com:
   NetBird IP: 192.168.178.101
@@ -376,12 +501,15 @@ func TestParsingToDetail(t *testing.T) {
   Status: Connected
   -- detail --
   Connection type: P2P
-  Direct: true
   ICE candidate (Local/Remote): -/-
   ICE candidate endpoints (Local/Remote): -/-
-  Last connection update: 2001-01-01 01:01:01
-  Last Wireguard handshake: 2001-01-01 01:01:02
+  Relay server address: 
+  Last connection update: %s
+  Last WireGuard handshake: %s
   Transfer status (received/sent) 200 B/100 B
+  Quantum resistance: false
+  Routes: 10.1.0.0/24
+  Latency: 10ms
 
  peer-2.awesome-domain.com:
   NetBird IP: 192.168.178.102
@@ -389,41 +517,53 @@ func TestParsingToDetail(t *testing.T) {
   Status: Connected
   -- detail --
   Connection type: Relayed
-  Direct: false
   ICE candidate (Local/Remote): relay/prflx
   ICE candidate endpoints (Local/Remote): 10.0.0.1:10001/10.0.10.1:10002
-  Last connection update: 2002-02-02 02:02:02
-  Last Wireguard handshake: 2002-02-02 02:02:03
+  Relay server address: 
+  Last connection update: %s
+  Last WireGuard handshake: %s
   Transfer status (received/sent) 2.0 KiB/1000 B
+  Quantum resistance: false
+  Routes: -
+  Latency: 10ms
 
+OS: %s/%s
 Daemon version: 0.14.1
-CLI version: development
+CLI version: %s
 Management: Connected to my-awesome-management.com:443
 Signal: Connected to my-awesome-signal.com:443
 Relays: 
   [stun:my-awesome-stun.com:3478] is Available
   [turns:my-awesome-turn.com:443?transport=tcp] is Unavailable, reason: context: deadline exceeded
+Nameservers: 
+  [8.8.8.8:53] for [.] is Available
+  [1.1.1.1:53, 2.2.2.2:53] for [example.com, example.net] is Unavailable, reason: timeout
 FQDN: some-localhost.awesome-domain.com
 NetBird IP: 192.168.178.100/16
 Interface type: Kernel
+Quantum resistance: false
+Routes: 10.10.0.0/24
 Peers count: 2/2 Connected
-`
+`, lastConnectionUpdate1, lastHandshake1, lastConnectionUpdate2, lastHandshake2, runtime.GOOS, runtime.GOARCH, overview.CliVersion)
 
 	assert.Equal(t, expectedDetail, detail)
 }
 
 func TestParsingToShortVersion(t *testing.T) {
-	shortVersion := parseGeneralSummary(overview, false, false)
+	shortVersion := parseGeneralSummary(overview, false, false, false)
 
-	expectedString :=
-		`Daemon version: 0.14.1
+	expectedString := fmt.Sprintf("OS: %s/%s", runtime.GOOS, runtime.GOARCH) + `
+Daemon version: 0.14.1
 CLI version: development
 Management: Connected
 Signal: Connected
 Relays: 1/2 Available
+Nameservers: 1/2 Available
 FQDN: some-localhost.awesome-domain.com
 NetBird IP: 192.168.178.100/16
 Interface type: Kernel
+Quantum resistance: false
+Routes: 10.10.0.0/24
 Peers count: 2/2 Connected
 `
 
@@ -437,3 +577,31 @@ func TestParsingOfIP(t *testing.T) {
 
 	assert.Equal(t, "192.168.178.123\n", parsedIP)
 }
+
+func TestTimeAgo(t *testing.T) {
+	now := time.Now()
+
+	cases := []struct {
+		name     string
+		input    time.Time
+		expected string
+	}{
+		{"Now", now, "Now"},
+		{"Seconds ago", now.Add(-10 * time.Second), "10 seconds ago"},
+		{"One minute ago", now.Add(-1 * time.Minute), "1 minute ago"},
+		{"Minutes and seconds ago", now.Add(-(1*time.Minute + 30*time.Second)), "1 minute, 30 seconds ago"},
+		{"One hour ago", now.Add(-1 * time.Hour), "1 hour ago"},
+		{"Hours and minutes ago", now.Add(-(2*time.Hour + 15*time.Minute)), "2 hours, 15 minutes ago"},
+		{"One day ago", now.Add(-24 * time.Hour), "1 day ago"},
+		{"Multiple days ago", now.Add(-(72*time.Hour + 20*time.Minute)), "3 days ago"},
+		{"Zero time", time.Time{}, "-"},
+		{"Unix zero time", time.Unix(0, 0), "-"},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			result := timeAgo(tc.input)
+			assert.Equal(t, tc.expected, result, "Failed %s", tc.name)
+		})
+	}
+}

client/cmd/testutil_test.go

@@ -7,12 +7,18 @@ import (
 	"testing"
 	"time"
 
+	"github.com/stretchr/testify/require"
+	"go.opentelemetry.io/otel"
+
 	"github.com/netbirdio/netbird/management/server/activity"
+	"github.com/netbirdio/netbird/management/server/telemetry"
 
 	"github.com/netbirdio/netbird/util"
 
 	"google.golang.org/grpc"
 
+	"github.com/netbirdio/management-integrations/integrations"
+
 	clientProto "github.com/netbirdio/netbird/client/proto"
 	client "github.com/netbirdio/netbird/client/server"
 	mgmtProto "github.com/netbirdio/netbird/management/proto"
@@ -51,7 +57,10 @@ func startSignal(t *testing.T) (*grpc.Server, net.Listener) {
 		t.Fatal(err)
 	}
 	s := grpc.NewServer()
-	sigProto.RegisterSignalExchangeServer(s, sig.NewServer())
+	srv, err := sig.NewServer(otel.Meter(""))
+	require.NoError(t, err)
+
+	sigProto.RegisterSignalExchangeServer(s, srv)
 	go func() {
 		if err := s.Serve(lis); err != nil {
 			panic(err)
@@ -63,28 +72,35 @@ func startSignal(t *testing.T) (*grpc.Server, net.Listener) {
 
 func startManagement(t *testing.T, config *mgmt.Config) (*grpc.Server, net.Listener) {
 	t.Helper()
+
 	lis, err := net.Listen("tcp", ":0")
 	if err != nil {
 		t.Fatal(err)
 	}
 	s := grpc.NewServer()
-	store, err := mgmt.NewStoreFromJson(config.Datadir, nil)
+	store, cleanUp, err := mgmt.NewTestStoreFromJson(context.Background(), config.Datadir)
 	if err != nil {
 		t.Fatal(err)
 	}
+	t.Cleanup(cleanUp)
 
 	peersUpdateManager := mgmt.NewPeersUpdateManager(nil)
 	eventStore := &activity.InMemoryEventStore{}
 	if err != nil {
 		return nil, nil
 	}
-	accountManager, err := mgmt.BuildManager(store, peersUpdateManager, nil, "", "",
-		eventStore, false)
+	iv, _ := integrations.NewIntegratedValidator(context.Background(), eventStore)
+
+	metrics, err := telemetry.NewDefaultAppMetrics(context.Background())
+	require.NoError(t, err)
+
+	accountManager, err := mgmt.BuildManager(context.Background(), store, peersUpdateManager, nil, "", "netbird.selfhosted", eventStore, nil, false, iv, metrics)
 	if err != nil {
 		t.Fatal(err)
 	}
-	turnManager := mgmt.NewTimeBasedAuthSecretsManager(peersUpdateManager, config.TURNConfig)
-	mgmtServer, err := mgmt.NewServer(config, accountManager, peersUpdateManager, turnManager, nil, nil)
+
+	secretsManager := mgmt.NewTimeBasedAuthSecretsManager(peersUpdateManager, config.TURNConfig, config.Relay)
+	mgmtServer, err := mgmt.NewServer(context.Background(), config, accountManager, peersUpdateManager, secretsManager, nil, nil)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -99,7 +115,7 @@ func startManagement(t *testing.T, config *mgmt.Config) (*grpc.Server, net.Liste
 }
 
 func startClientDaemon(
-	t *testing.T, ctx context.Context, managementURL, configPath string,
+	t *testing.T, ctx context.Context, _, configPath string,
 ) (*grpc.Server, net.Listener) {
 	t.Helper()
 	lis, err := net.Listen("tcp", "127.0.0.1:0")

client/cmd/up.go

@@ -7,11 +7,13 @@ import (
 	"net/netip"
 	"runtime"
 	"strings"
+	"time"
 
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"google.golang.org/grpc/codes"
 	gstatus "google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/durationpb"
 
 	"github.com/netbirdio/netbird/client/internal"
 	"github.com/netbirdio/netbird/client/internal/peer"
@@ -40,6 +42,12 @@ func init() {
 	upCmd.PersistentFlags().BoolVarP(&foregroundMode, "foreground-mode", "F", false, "start service in foreground")
 	upCmd.PersistentFlags().StringVar(&interfaceName, interfaceNameFlag, iface.WgInterfaceDefault, "Wireguard interface name")
 	upCmd.PersistentFlags().Uint16Var(&wireguardPort, wireguardPortFlag, iface.DefaultWgPort, "Wireguard interface listening port")
+	upCmd.PersistentFlags().BoolVarP(&networkMonitor, networkMonitorFlag, "N", networkMonitor,
+		`Manage network monitoring. Defaults to true on Windows and macOS, false on Linux. `+
+			`E.g. --network-monitor=false to disable or --network-monitor=true to enable.`,
+	)
+	upCmd.PersistentFlags().StringSliceVar(&extraIFaceBlackList, extraIFaceBlackListFlag, nil, "Extra list of default interfaces to ignore for listening")
+	upCmd.PersistentFlags().DurationVar(&dnsRouteInterval, dnsRouteIntervalFlag, time.Minute, "DNS route update interval")
 }
 
 func upFunc(cmd *cobra.Command, args []string) error {
@@ -83,17 +91,26 @@ func runInForegroundMode(ctx context.Context, cmd *cobra.Command) error {
 	}
 
 	ic := internal.ConfigInput{
-		ManagementURL:    managementURL,
-		AdminURL:         adminURL,
-		ConfigPath:       configPath,
-		NATExternalIPs:   natExternalIPs,
-		CustomDNSAddress: customDNSAddressConverted,
+		ManagementURL:       managementURL,
+		AdminURL:            adminURL,
+		ConfigPath:          configPath,
+		NATExternalIPs:      natExternalIPs,
+		CustomDNSAddress:    customDNSAddressConverted,
+		ExtraIFaceBlackList: extraIFaceBlackList,
 	}
 
 	if cmd.Flag(enableRosenpassFlag).Changed {
 		ic.RosenpassEnabled = &rosenpassEnabled
 	}
 
+	if cmd.Flag(rosenpassPermissiveFlag).Changed {
+		ic.RosenpassPermissive = &rosenpassPermissive
+	}
+
+	if cmd.Flag(serverSSHAllowedFlag).Changed {
+		ic.ServerSSHAllowed = &serverSSHAllowed
+	}
+
 	if cmd.Flag(interfaceNameFlag).Changed {
 		if err := parseInterfaceName(interfaceName); err != nil {
 			return err
@@ -106,10 +123,35 @@ func runInForegroundMode(ctx context.Context, cmd *cobra.Command) error {
 		ic.WireguardPort = &p
 	}
 
+	if cmd.Flag(networkMonitorFlag).Changed {
+		ic.NetworkMonitor = &networkMonitor
+	}
+
 	if rootCmd.PersistentFlags().Changed(preSharedKeyFlag) {
 		ic.PreSharedKey = &preSharedKey
 	}
 
+	if cmd.Flag(disableAutoConnectFlag).Changed {
+		ic.DisableAutoConnect = &autoConnectDisabled
+
+		if autoConnectDisabled {
+			cmd.Println("Autoconnect has been disabled. The client won't connect automatically when the service starts.")
+		}
+
+		if !autoConnectDisabled {
+			cmd.Println("Autoconnect has been enabled. The client will connect automatically when the service starts.")
+		}
+	}
+
+	if cmd.Flag(dnsRouteIntervalFlag).Changed {
+		ic.DNSRouteInterval = &dnsRouteInterval
+	}
+
+	providedSetupKey, err := getSetupKey()
+	if err != nil {
+		return err
+	}
+
 	config, err := internal.UpdateOrCreateConfig(ic)
 	if err != nil {
 		return fmt.Errorf("get config file: %v", err)
@@ -117,7 +159,7 @@ func runInForegroundMode(ctx context.Context, cmd *cobra.Command) error {
 
 	config, _ = internal.UpdateOldManagementURL(ctx, config, configPath)
 
-	err = foregroundLogin(ctx, cmd, config, setupKey)
+	err = foregroundLogin(ctx, cmd, config, providedSetupKey)
 	if err != nil {
 		return fmt.Errorf("foreground login failed: %v", err)
 	}
@@ -125,11 +167,15 @@ func runInForegroundMode(ctx context.Context, cmd *cobra.Command) error {
 	var cancel context.CancelFunc
 	ctx, cancel = context.WithCancel(ctx)
 	SetupCloseHandler(ctx, cancel)
-	return internal.RunClient(ctx, config, peer.NewRecorder(config.ManagementURL.String()))
+
+	r := peer.NewRecorder(config.ManagementURL.String())
+	r.GetFullStatus()
+
+	connectClient := internal.NewConnectClient(ctx, config, r)
+	return connectClient.Run()
 }
 
 func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
-
 	customDNSAddressConverted, err := parseCustomDNSAddress(cmd.Flag(dnsResolverAddress).Changed)
 	if err != nil {
 		return err
@@ -161,8 +207,13 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 		return nil
 	}
 
+	providedSetupKey, err := getSetupKey()
+	if err != nil {
+		return err
+	}
+
 	loginRequest := proto.LoginRequest{
-		SetupKey:             setupKey,
+		SetupKey:             providedSetupKey,
 		ManagementUrl:        managementURL,
 		AdminURL:             adminURL,
 		NatExternalIPs:       natExternalIPs,
@@ -170,6 +221,7 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 		CustomDNSAddress:     customDNSAddressConverted,
 		IsLinuxDesktopClient: isLinuxRunningDesktop(),
 		Hostname:             hostName,
+		ExtraIFaceBlacklist:  extraIFaceBlackList,
 	}
 
 	if rootCmd.PersistentFlags().Changed(preSharedKeyFlag) {
@@ -180,6 +232,18 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 		loginRequest.RosenpassEnabled = &rosenpassEnabled
 	}
 
+	if cmd.Flag(rosenpassPermissiveFlag).Changed {
+		loginRequest.RosenpassPermissive = &rosenpassPermissive
+	}
+
+	if cmd.Flag(serverSSHAllowedFlag).Changed {
+		loginRequest.ServerSSHAllowed = &serverSSHAllowed
+	}
+
+	if cmd.Flag(disableAutoConnectFlag).Changed {
+		loginRequest.DisableAutoConnect = &autoConnectDisabled
+	}
+
 	if cmd.Flag(interfaceNameFlag).Changed {
 		if err := parseInterfaceName(interfaceName); err != nil {
 			return err
@@ -192,6 +256,14 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 		loginRequest.WireguardPort = &wp
 	}
 
+	if cmd.Flag(networkMonitorFlag).Changed {
+		loginRequest.NetworkMonitor = &networkMonitor
+	}
+
+	if cmd.Flag(dnsRouteIntervalFlag).Changed {
+		loginRequest.DnsRouteInterval = durationpb.New(dnsRouteInterval)
+	}
+
 	var loginErr error
 
 	var loginResp *proto.LoginResponse

client/cmd/up_daemon_test.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"context"
+	"os"
 	"testing"
 	"time"
 
@@ -40,6 +41,36 @@ func TestUpDaemon(t *testing.T) {
 		return
 	}
 
+	// Test the setup-key-file flag.
+	tempFile, err := os.CreateTemp("", "setup-key")
+	if err != nil {
+		t.Errorf("could not create temp file, got error %v", err)
+		return
+	}
+	defer os.Remove(tempFile.Name())
+	if _, err := tempFile.Write([]byte("A2C8E62B-38F5-4553-B31E-DD66C696CEBB")); err != nil {
+		t.Errorf("could not write to temp file, got error %v", err)
+		return
+	}
+	if err := tempFile.Close(); err != nil {
+		t.Errorf("unable to close file, got error %v", err)
+	}
+	rootCmd.SetArgs([]string{
+		"login",
+		"--daemon-addr", "tcp://" + cliAddr,
+		"--setup-key-file", tempFile.Name(),
+		"--log-file", "",
+	})
+	if err := rootCmd.Execute(); err != nil {
+		t.Errorf("expected no error while running up command, got %v", err)
+		return
+	}
+	time.Sleep(time.Second * 3)
+	if status, err := state.Status(); err != nil && status != internal.StatusIdle {
+		t.Errorf("wrong status after login: %s, %v", internal.StatusIdle, err)
+		return
+	}
+
 	rootCmd.SetArgs([]string{
 		"up",
 		"--daemon-addr", "tcp://" + cliAddr,

client/errors/errors.go

@@ -0,0 +1,30 @@
+package errors
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/hashicorp/go-multierror"
+)
+
+func formatError(es []error) string {
+	if len(es) == 0 {
+		return fmt.Sprintf("0 error occurred:\n\t* %s", es[0])
+	}
+
+	points := make([]string, len(es))
+	for i, err := range es {
+		points[i] = fmt.Sprintf("* %s", err)
+	}
+
+	return fmt.Sprintf(
+		"%d errors occurred:\n\t%s",
+		len(es), strings.Join(points, "\n\t"))
+}
+
+func FormatErrorOrNil(err *multierror.Error) error {
+	if err != nil {
+		err.ErrorFormat = formatError
+	}
+	return err.ErrorOrNil()
+}

client/firewall/create_linux.go

@@ -42,20 +42,20 @@ func NewFirewall(context context.Context, iface IFaceMapper) (firewall.Manager,
 
 	switch check() {
 	case IPTABLES:
-		log.Debug("creating an iptables firewall manager")
+		log.Info("creating an iptables firewall manager")
 		fm, errFw = nbiptables.Create(context, iface)
 		if errFw != nil {
 			log.Errorf("failed to create iptables manager: %s", errFw)
 		}
 	case NFTABLES:
-		log.Debug("creating an nftables firewall manager")
+		log.Info("creating an nftables firewall manager")
 		fm, errFw = nbnftables.Create(context, iface)
 		if errFw != nil {
 			log.Errorf("failed to create nftables manager: %s", errFw)
 		}
 	default:
 		errFw = fmt.Errorf("no firewall manager found")
-		log.Debug("no firewall manager found, try to use userspace packet filtering firewall")
+		log.Info("no firewall manager found, trying to use userspace packet filtering firewall")
 	}
 
 	if iface.IsUserspaceBind() {
@@ -85,16 +85,58 @@ func NewFirewall(context context.Context, iface IFaceMapper) (firewall.Manager,
 
 // check returns the firewall type based on common lib checks. It returns UNKNOWN if no firewall is found.
 func check() FWType {
-	nf := nftables.Conn{}
-	if _, err := nf.ListChains(); err == nil && os.Getenv(SKIP_NFTABLES_ENV) != "true" {
-		return NFTABLES
+	useIPTABLES := false
+	var iptablesChains []string
+	ip, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
+	if err == nil && isIptablesClientAvailable(ip) {
+		major, minor, _ := ip.GetIptablesVersion()
+		// use iptables when its version is lower than 1.8.0 which doesn't work well with our nftables manager
+		if major < 1 || (major == 1 && minor < 8) {
+			return IPTABLES
+		}
+
+		useIPTABLES = true
+
+		iptablesChains, err = ip.ListChains("filter")
+		if err != nil {
+			log.Errorf("failed to list iptables chains: %s", err)
+			useIPTABLES = false
+		}
 	}
 
-	ip, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
-	if err != nil {
-		return UNKNOWN
+	nf := nftables.Conn{}
+	if chains, err := nf.ListChains(); err == nil && os.Getenv(SKIP_NFTABLES_ENV) != "true" {
+		if !useIPTABLES {
+			return NFTABLES
+		}
+
+		// search for chains where table is filter
+		// if we find one, we assume that nftables manager can be used with iptables
+		for _, chain := range chains {
+			if chain.Table.Name == "filter" {
+				return NFTABLES
+			}
+		}
+
+		// check tables for the following constraints:
+		// 1. there is no chain in nftables for the filter table and there is at least one chain in iptables, we assume that nftables manager can not be used
+		// 2. there is no tables or more than one table, we assume that nftables manager can be used
+		// 3. there is only one table and its name is filter, we assume that nftables manager can not be used, since there was no chain in it
+		// 4. if we find an error we log and continue with iptables check
+		nbTablesList, err := nf.ListTables()
+		switch {
+		case err == nil && len(iptablesChains) > 0:
+			return IPTABLES
+		case err == nil && len(nbTablesList) != 1:
+			return NFTABLES
+		case err == nil && len(nbTablesList) == 1 && nbTablesList[0].Name == "filter":
+			return IPTABLES
+		case err != nil:
+			log.Errorf("failed to list nftables tables on fw manager discovery: %s", err)
+		}
 	}
-	if isIptablesClientAvailable(ip) {
+
+	if useIPTABLES {
 		return IPTABLES
 	}
 

client/firewall/iptables/router_linux.go

@@ -74,12 +74,12 @@ func (i *routerManager) InsertRoutingRules(pair firewall.RouterPair) error {
 		return nil
 	}
 
-	err = i.insertRoutingRule(firewall.NatFormat, tableNat, chainRTNAT, routingFinalNatJump, pair)
+	err = i.addNATRule(firewall.NatFormat, tableNat, chainRTNAT, routingFinalNatJump, pair)
 	if err != nil {
 		return err
 	}
 
-	err = i.insertRoutingRule(firewall.InNatFormat, tableNat, chainRTNAT, routingFinalNatJump, firewall.GetInPair(pair))
+	err = i.addNATRule(firewall.InNatFormat, tableNat, chainRTNAT, routingFinalNatJump, firewall.GetInPair(pair))
 	if err != nil {
 		return err
 	}
@@ -87,12 +87,12 @@ func (i *routerManager) InsertRoutingRules(pair firewall.RouterPair) error {
 	return nil
 }
 
-// insertRoutingRule inserts an iptable rule
+// insertRoutingRule inserts an iptables rule
 func (i *routerManager) insertRoutingRule(keyFormat, table, chain, jump string, pair firewall.RouterPair) error {
 	var err error
 
 	ruleKey := firewall.GenKey(keyFormat, pair.ID)
-	rule := genRuleSpec(jump, ruleKey, pair.Source, pair.Destination)
+	rule := genRuleSpec(jump, pair.Source, pair.Destination)
 	existingRule, found := i.rules[ruleKey]
 	if found {
 		err = i.iptablesClient.DeleteIfExists(table, chain, existingRule...)
@@ -101,6 +101,7 @@ func (i *routerManager) insertRoutingRule(keyFormat, table, chain, jump string,
 		}
 		delete(i.rules, ruleKey)
 	}
+
 	err = i.iptablesClient.Insert(table, chain, 1, rule...)
 	if err != nil {
 		return fmt.Errorf("error while adding new %s rule for %s: %v", getIptablesRuleType(table), pair.Destination, err)
@@ -317,6 +318,13 @@ func (i *routerManager) createChain(table, newChain string) error {
 			return fmt.Errorf("couldn't create chain %s in %s table, error: %v", newChain, table, err)
 		}
 
+		// Add the loopback return rule to the NAT chain
+		loopbackRule := []string{"-o", "lo", "-j", "RETURN"}
+		err = i.iptablesClient.Insert(table, newChain, 1, loopbackRule...)
+		if err != nil {
+			return fmt.Errorf("failed to add loopback return rule to %s: %v", chainRTNAT, err)
+		}
+
 		err = i.iptablesClient.Append(table, newChain, "-j", "RETURN")
 		if err != nil {
 			return fmt.Errorf("couldn't create chain %s default rule, error: %v", newChain, err)
@@ -326,9 +334,33 @@ func (i *routerManager) createChain(table, newChain string) error {
 	return nil
 }
 
-// genRuleSpec generates rule specification with comment identifier
-func genRuleSpec(jump, id, source, destination string) []string {
-	return []string{"-s", source, "-d", destination, "-j", jump, "-m", "comment", "--comment", id}
+// addNATRule appends an iptables rule pair to the nat chain
+func (i *routerManager) addNATRule(keyFormat, table, chain, jump string, pair firewall.RouterPair) error {
+	ruleKey := firewall.GenKey(keyFormat, pair.ID)
+	rule := genRuleSpec(jump, pair.Source, pair.Destination)
+	existingRule, found := i.rules[ruleKey]
+	if found {
+		err := i.iptablesClient.DeleteIfExists(table, chain, existingRule...)
+		if err != nil {
+			return fmt.Errorf("error while removing existing NAT rule for %s: %v", pair.Destination, err)
+		}
+		delete(i.rules, ruleKey)
+	}
+
+	// inserting after loopback ignore rule
+	err := i.iptablesClient.Insert(table, chain, 2, rule...)
+	if err != nil {
+		return fmt.Errorf("error while appending new NAT rule for %s: %v", pair.Destination, err)
+	}
+
+	i.rules[ruleKey] = rule
+
+	return nil
+}
+
+// genRuleSpec generates rule specification
+func genRuleSpec(jump, source, destination string) []string {
+	return []string{"-s", source, "-d", destination, "-j", jump}
 }
 
 func getIptablesRuleType(table string) string {

client/firewall/iptables/router_linux_test.go

@@ -51,14 +51,12 @@ func TestIptablesManager_RestoreOrCreateContainers(t *testing.T) {
 		Destination: "100.100.100.0/24",
 		Masquerade:  true,
 	}
-	forward4RuleKey := firewall.GenKey(firewall.ForwardingFormat, pair.ID)
-	forward4Rule := genRuleSpec(routingFinalForwardJump, forward4RuleKey, pair.Source, pair.Destination)
+	forward4Rule := genRuleSpec(routingFinalForwardJump, pair.Source, pair.Destination)
 
 	err = manager.iptablesClient.Insert(tableFilter, chainRTFWD, 1, forward4Rule...)
 	require.NoError(t, err, "inserting rule should not return error")
 
-	nat4RuleKey := firewall.GenKey(firewall.NatFormat, pair.ID)
-	nat4Rule := genRuleSpec(routingFinalNatJump, nat4RuleKey, pair.Source, pair.Destination)
+	nat4Rule := genRuleSpec(routingFinalNatJump, pair.Source, pair.Destination)
 
 	err = manager.iptablesClient.Insert(tableNat, chainRTNAT, 1, nat4Rule...)
 	require.NoError(t, err, "inserting rule should not return error")
@@ -92,7 +90,7 @@ func TestIptablesManager_InsertRoutingRules(t *testing.T) {
 			require.NoError(t, err, "forwarding pair should be inserted")
 
 			forwardRuleKey := firewall.GenKey(firewall.ForwardingFormat, testCase.InputPair.ID)
-			forwardRule := genRuleSpec(routingFinalForwardJump, forwardRuleKey, testCase.InputPair.Source, testCase.InputPair.Destination)
+			forwardRule := genRuleSpec(routingFinalForwardJump, testCase.InputPair.Source, testCase.InputPair.Destination)
 
 			exists, err := iptablesClient.Exists(tableFilter, chainRTFWD, forwardRule...)
 			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableFilter, chainRTFWD)
@@ -103,7 +101,7 @@ func TestIptablesManager_InsertRoutingRules(t *testing.T) {
 			require.Equal(t, forwardRule[:4], foundRule[:4], "stored forwarding rule should match")
 
 			inForwardRuleKey := firewall.GenKey(firewall.InForwardingFormat, testCase.InputPair.ID)
-			inForwardRule := genRuleSpec(routingFinalForwardJump, inForwardRuleKey, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
+			inForwardRule := genRuleSpec(routingFinalForwardJump, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
 
 			exists, err = iptablesClient.Exists(tableFilter, chainRTFWD, inForwardRule...)
 			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableFilter, chainRTFWD)
@@ -114,7 +112,7 @@ func TestIptablesManager_InsertRoutingRules(t *testing.T) {
 			require.Equal(t, inForwardRule[:4], foundRule[:4], "stored income forwarding rule should match")
 
 			natRuleKey := firewall.GenKey(firewall.NatFormat, testCase.InputPair.ID)
-			natRule := genRuleSpec(routingFinalNatJump, natRuleKey, testCase.InputPair.Source, testCase.InputPair.Destination)
+			natRule := genRuleSpec(routingFinalNatJump, testCase.InputPair.Source, testCase.InputPair.Destination)
 
 			exists, err = iptablesClient.Exists(tableNat, chainRTNAT, natRule...)
 			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
@@ -130,7 +128,7 @@ func TestIptablesManager_InsertRoutingRules(t *testing.T) {
 			}
 
 			inNatRuleKey := firewall.GenKey(firewall.InNatFormat, testCase.InputPair.ID)
-			inNatRule := genRuleSpec(routingFinalNatJump, inNatRuleKey, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
+			inNatRule := genRuleSpec(routingFinalNatJump, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
 
 			exists, err = iptablesClient.Exists(tableNat, chainRTNAT, inNatRule...)
 			require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
@@ -167,25 +165,25 @@ func TestIptablesManager_RemoveRoutingRules(t *testing.T) {
 			require.NoError(t, err, "shouldn't return error")
 
 			forwardRuleKey := firewall.GenKey(firewall.ForwardingFormat, testCase.InputPair.ID)
-			forwardRule := genRuleSpec(routingFinalForwardJump, forwardRuleKey, testCase.InputPair.Source, testCase.InputPair.Destination)
+			forwardRule := genRuleSpec(routingFinalForwardJump, testCase.InputPair.Source, testCase.InputPair.Destination)
 
 			err = iptablesClient.Insert(tableFilter, chainRTFWD, 1, forwardRule...)
 			require.NoError(t, err, "inserting rule should not return error")
 
 			inForwardRuleKey := firewall.GenKey(firewall.InForwardingFormat, testCase.InputPair.ID)
-			inForwardRule := genRuleSpec(routingFinalForwardJump, inForwardRuleKey, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
+			inForwardRule := genRuleSpec(routingFinalForwardJump, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
 
 			err = iptablesClient.Insert(tableFilter, chainRTFWD, 1, inForwardRule...)
 			require.NoError(t, err, "inserting rule should not return error")
 
 			natRuleKey := firewall.GenKey(firewall.NatFormat, testCase.InputPair.ID)
-			natRule := genRuleSpec(routingFinalNatJump, natRuleKey, testCase.InputPair.Source, testCase.InputPair.Destination)
+			natRule := genRuleSpec(routingFinalNatJump, testCase.InputPair.Source, testCase.InputPair.Destination)
 
 			err = iptablesClient.Insert(tableNat, chainRTNAT, 1, natRule...)
 			require.NoError(t, err, "inserting rule should not return error")
 
 			inNatRuleKey := firewall.GenKey(firewall.InNatFormat, testCase.InputPair.ID)
-			inNatRule := genRuleSpec(routingFinalNatJump, inNatRuleKey, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
+			inNatRule := genRuleSpec(routingFinalNatJump, firewall.GetInPair(testCase.InputPair).Source, firewall.GetInPair(testCase.InputPair).Destination)
 
 			err = iptablesClient.Insert(tableNat, chainRTNAT, 1, inNatRule...)
 			require.NoError(t, err, "inserting rule should not return error")

client/firewall/nftables/manager_linux.go

@@ -95,7 +95,7 @@ func (m *Manager) InsertRoutingRules(pair firewall.RouterPair) error {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 
-	return m.router.InsertRoutingRules(pair)
+	return m.router.AddRoutingRules(pair)
 }
 
 func (m *Manager) RemoveRoutingRules(pair firewall.RouterPair) error {

client/firewall/nftables/route_linux.go

@@ -22,6 +22,8 @@ const (
 
 	userDataAcceptForwardRuleSrc = "frwacceptsrc"
 	userDataAcceptForwardRuleDst = "frwacceptdst"
+
+	loopbackInterface = "lo\x00"
 )
 
 // some presets for building nftable rules
@@ -126,6 +128,22 @@ func (r *router) createContainers() error {
 		Type:     nftables.ChainTypeNAT,
 	})
 
+	// Add RETURN rule for loopback interface
+	loRule := &nftables.Rule{
+		Table: r.workTable,
+		Chain: r.chains[chainNameRoutingNat],
+		Exprs: []expr.Any{
+			&expr.Meta{Key: expr.MetaKeyOIFNAME, Register: 1},
+			&expr.Cmp{
+				Op:       expr.CmpOpEq,
+				Register: 1,
+				Data:     []byte(loopbackInterface),
+			},
+			&expr.Verdict{Kind: expr.VerdictReturn},
+		},
+	}
+	r.conn.InsertRule(loRule)
+
 	err := r.refreshRulesMap()
 	if err != nil {
 		log.Errorf("failed to clean up rules from FORWARD chain: %s", err)
@@ -138,28 +156,28 @@ func (r *router) createContainers() error {
 	return nil
 }
 
-// InsertRoutingRules inserts a nftable rule pair to the forwarding chain and if enabled, to the nat chain
-func (r *router) InsertRoutingRules(pair manager.RouterPair) error {
+// AddRoutingRules appends a nftable rule pair to the forwarding chain and if enabled, to the nat chain
+func (r *router) AddRoutingRules(pair manager.RouterPair) error {
 	err := r.refreshRulesMap()
 	if err != nil {
 		return err
 	}
 
-	err = r.insertRoutingRule(manager.ForwardingFormat, chainNameRouteingFw, pair, false)
+	err = r.addRoutingRule(manager.ForwardingFormat, chainNameRouteingFw, pair, false)
 	if err != nil {
 		return err
 	}
-	err = r.insertRoutingRule(manager.InForwardingFormat, chainNameRouteingFw, manager.GetInPair(pair), false)
+	err = r.addRoutingRule(manager.InForwardingFormat, chainNameRouteingFw, manager.GetInPair(pair), false)
 	if err != nil {
 		return err
 	}
 
 	if pair.Masquerade {
-		err = r.insertRoutingRule(manager.NatFormat, chainNameRoutingNat, pair, true)
+		err = r.addRoutingRule(manager.NatFormat, chainNameRoutingNat, pair, true)
 		if err != nil {
 			return err
 		}
-		err = r.insertRoutingRule(manager.InNatFormat, chainNameRoutingNat, manager.GetInPair(pair), true)
+		err = r.addRoutingRule(manager.InNatFormat, chainNameRoutingNat, manager.GetInPair(pair), true)
 		if err != nil {
 			return err
 		}
@@ -177,8 +195,8 @@ func (r *router) InsertRoutingRules(pair manager.RouterPair) error {
 	return nil
 }
 
-// insertRoutingRule inserts a nftable rule to the conn client flush queue
-func (r *router) insertRoutingRule(format, chainName string, pair manager.RouterPair, isNat bool) error {
+// addRoutingRule inserts a nftable rule to the conn client flush queue
+func (r *router) addRoutingRule(format, chainName string, pair manager.RouterPair, isNat bool) error {
 	sourceExp := generateCIDRMatcherExpressions(true, pair.Source)
 	destExp := generateCIDRMatcherExpressions(false, pair.Destination)
 
@@ -199,7 +217,7 @@ func (r *router) insertRoutingRule(format, chainName string, pair manager.Router
 		}
 	}
 
-	r.rules[ruleKey] = r.conn.InsertRule(&nftables.Rule{
+	r.rules[ruleKey] = r.conn.AddRule(&nftables.Rule{
 		Table:    r.workTable,
 		Chain:    r.chains[chainName],
 		Exprs:    expression,

client/firewall/nftables/router_linux_test.go

@@ -47,7 +47,7 @@ func TestNftablesManager_InsertRoutingRules(t *testing.T) {
 
 			require.NoError(t, err, "shouldn't return error")
 
-			err = manager.InsertRoutingRules(testCase.InputPair)
+			err = manager.AddRoutingRules(testCase.InputPair)
 			defer func() {
 				_ = manager.RemoveRoutingRules(testCase.InputPair)
 			}()

client/firewall/uspfilter/allow_netbird_windows.go

@@ -64,15 +64,18 @@ func manageFirewallRule(ruleName string, action action, extraArgs ...string) err
 	if action == addRule {
 		args = append(args, extraArgs...)
 	}
-
-	cmd := exec.Command("netsh", args...)
+	netshCmd := GetSystem32Command("netsh")
+	cmd := exec.Command(netshCmd, args...)
 	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
 	return cmd.Run()
 }
 
 func isWindowsFirewallReachable() bool {
 	args := []string{"advfirewall", "show", "allprofiles", "state"}
-	cmd := exec.Command("netsh", args...)
+
+	netshCmd := GetSystem32Command("netsh")
+
+	cmd := exec.Command(netshCmd, args...)
 	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
 
 	_, err := cmd.Output()
@@ -87,8 +90,23 @@ func isWindowsFirewallReachable() bool {
 func isFirewallRuleActive(ruleName string) bool {
 	args := []string{"advfirewall", "firewall", "show", "rule", "name=" + ruleName}
 
-	cmd := exec.Command("netsh", args...)
+	netshCmd := GetSystem32Command("netsh")
+
+	cmd := exec.Command(netshCmd, args...)
 	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
 	_, err := cmd.Output()
 	return err == nil
 }
+
+// GetSystem32Command checks if a command can be found in the system path and returns it. In case it can't find it
+// in the path it will return the full path of a command assuming C:\windows\system32 as the base path.
+func GetSystem32Command(command string) string {
+	_, err := exec.LookPath(command)
+	if err == nil {
+		return command
+	}
+
+	log.Tracef("Command %s not found in PATH, using C:\\windows\\system32\\%s.exe path", command, command)
+
+	return "C:\\windows\\system32\\" + command + ".exe"
+}

client/firewall/uspfilter/uspfilter.go

@@ -337,7 +337,6 @@ func validateRule(ip net.IP, packetData []byte, rules map[string]Rule, d *decode
 			if rule.dPort != 0 && rule.dPort == uint16(d.udp.DstPort) {
 				return rule.drop, true
 			}
-			return rule.drop, true
 		case layers.LayerTypeICMPv4, layers.LayerTypeICMPv6:
 			return rule.drop, true
 		}

client/internal/auth/device_flow.go

@@ -3,6 +3,7 @@ package auth
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -180,7 +181,7 @@ func (d *DeviceAuthorizationFlow) WaitToken(ctx context.Context, info AuthFlowIn
 					continue
 				}
 
-				return TokenInfo{}, fmt.Errorf(tokenResponse.ErrorDescription)
+				return TokenInfo{}, errors.New(tokenResponse.ErrorDescription)
 			}
 
 			tokenInfo := TokenInfo{

client/internal/auth/oauth.go

@@ -26,7 +26,7 @@ type HTTPClient interface {
 }
 
 // AuthFlowInfo holds information for the OAuth 2.0  authorization flow
-type AuthFlowInfo struct {
+type AuthFlowInfo struct { //nolint:revive
 	DeviceCode              string `json:"device_code"`
 	UserCode                string `json:"user_code"`
 	VerificationURI         string `json:"verification_uri"`
@@ -69,6 +69,11 @@ func NewOAuthFlow(ctx context.Context, config *internal.Config, isLinuxDesktopCl
 		return authenticateWithDeviceCodeFlow(ctx, config)
 	}
 
+	// On FreeBSD we currently do not support desktop environments and offer only Device Code Flow (#2384)
+	if runtime.GOOS == "freebsd" {
+		return authenticateWithDeviceCodeFlow(ctx, config)
+	}
+
 	pkceFlow, err := authenticateWithPKCEFlow(ctx, config)
 	if err != nil {
 		// fallback to device code flow
@@ -81,7 +86,7 @@ func NewOAuthFlow(ctx context.Context, config *internal.Config, isLinuxDesktopCl
 
 // authenticateWithPKCEFlow initializes the Proof Key for Code Exchange flow auth flow
 func authenticateWithPKCEFlow(ctx context.Context, config *internal.Config) (OAuthFlow, error) {
-	pkceFlowInfo, err := internal.GetPKCEAuthorizationFlowInfo(ctx, config.PrivateKey, config.ManagementURL)
+	pkceFlowInfo, err := internal.GetPKCEAuthorizationFlowInfo(ctx, config.PrivateKey, config.ManagementURL, config.ClientCertKeyPair)
 	if err != nil {
 		return nil, fmt.Errorf("getting pkce authorization flow info failed with error: %v", err)
 	}

client/internal/auth/pkce_flow.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"crypto/sha256"
 	"crypto/subtle"
+	"crypto/tls"
 	"encoding/base64"
 	"errors"
 	"fmt"
@@ -143,6 +144,18 @@ func (p *PKCEAuthorizationFlow) WaitToken(ctx context.Context, _ AuthFlowInfo) (
 func (p *PKCEAuthorizationFlow) startServer(server *http.Server, tokenChan chan<- *oauth2.Token, errChan chan<- error) {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+		cert := p.providerConfig.ClientCertPair
+		if cert != nil {
+			tr := &http.Transport{
+				TLSClientConfig: &tls.Config{
+					Certificates: []tls.Certificate{*cert},
+				},
+			}
+			sslClient := &http.Client{Transport: tr}
+			ctx := context.WithValue(req.Context(), oauth2.HTTPClient, sslClient)
+			req = req.WithContext(ctx)
+		}
+
 		token, err := p.handleRequest(req)
 		if err != nil {
 			renderPKCEFlowTmpl(w, err)

client/internal/config.go

@@ -2,15 +2,21 @@ package internal
 
 import (
 	"context"
+	"crypto/tls"
 	"fmt"
 	"net/url"
 	"os"
+	"reflect"
+	"runtime"
+	"strings"
+	"time"
 
 	log "github.com/sirupsen/logrus"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 
+	"github.com/netbirdio/netbird/client/internal/routemanager/dynamic"
 	"github.com/netbirdio/netbird/client/ssh"
 	"github.com/netbirdio/netbird/iface"
 	mgm "github.com/netbirdio/netbird/management/client"
@@ -30,20 +36,30 @@ const (
 	DefaultAdminURL = "https://app.netbird.io:443"
 )
 
-var defaultInterfaceBlacklist = []string{iface.WgInterfaceDefault, "wt", "utun", "tun0", "zt", "ZeroTier", "wg", "ts",
-	"Tailscale", "tailscale", "docker", "veth", "br-", "lo"}
+var defaultInterfaceBlacklist = []string{
+	iface.WgInterfaceDefault, "wt", "utun", "tun0", "zt", "ZeroTier", "wg", "ts",
+	"Tailscale", "tailscale", "docker", "veth", "br-", "lo",
+}
 
 // ConfigInput carries configuration changes to the client
 type ConfigInput struct {
-	ManagementURL    string
-	AdminURL         string
-	ConfigPath       string
-	PreSharedKey     *string
-	NATExternalIPs   []string
-	CustomDNSAddress []byte
-	RosenpassEnabled *bool
-	InterfaceName    *string
-	WireguardPort    *int
+	ManagementURL       string
+	AdminURL            string
+	ConfigPath          string
+	PreSharedKey        *string
+	ServerSSHAllowed    *bool
+	NATExternalIPs      []string
+	CustomDNSAddress    []byte
+	RosenpassEnabled    *bool
+	RosenpassPermissive *bool
+	InterfaceName       *string
+	WireguardPort       *int
+	NetworkMonitor      *bool
+	DisableAutoConnect  *bool
+	ExtraIFaceBlackList []string
+	DNSRouteInterval    *time.Duration
+	ClientCertPath      string
+	ClientCertKeyPath   string
 }
 
 // Config Configuration type
@@ -55,9 +71,12 @@ type Config struct {
 	AdminURL             *url.URL
 	WgIface              string
 	WgPort               int
+	NetworkMonitor       *bool
 	IFaceBlackList       []string
 	DisableIPv6Discovery bool
 	RosenpassEnabled     bool
+	RosenpassPermissive  bool
+	ServerSSHAllowed     *bool
 	// SSHKey is a private SSH key in a PEM format
 	SSHKey string
 
@@ -79,6 +98,20 @@ type Config struct {
 	NATExternalIPs []string
 	// CustomDNSAddress sets the DNS resolver listening address in format ip:port
 	CustomDNSAddress string
+
+	// DisableAutoConnect determines whether the client should not start with the service
+	// it's set to false by default due to backwards compatibility
+	DisableAutoConnect bool
+
+	// DNSRouteInterval is the interval in which the DNS routes are updated
+	DNSRouteInterval time.Duration
+	//Path to a certificate used for mTLS authentication
+	ClientCertPath string
+
+	//Path to corresponding private key of ClientCertPath
+	ClientCertKeyPath string
+
+	ClientCertKeyPair *tls.Certificate `json:"-"`
 }
 
 // ReadConfig read config file and return with Config. If it is not exists create a new with default values
@@ -88,6 +121,15 @@ func ReadConfig(configPath string) (*Config, error) {
 		if _, err := util.ReadJson(configPath, config); err != nil {
 			return nil, err
 		}
+		// initialize through apply() without changes
+		if changed, err := config.apply(ConfigInput{}); err != nil {
+			return nil, err
+		} else if changed {
+			if err = WriteOutConfig(configPath, config); err != nil {
+				return nil, err
+			}
+		}
+
 		return config, nil
 	}
 
@@ -139,68 +181,15 @@ func WriteOutConfig(path string, config *Config) error {
 
 // createNewConfig creates a new config generating a new Wireguard key and saving to file
 func createNewConfig(input ConfigInput) (*Config, error) {
-	wgKey := generateKey()
-	pem, err := ssh.GeneratePrivateKey(ssh.ED25519)
-	if err != nil {
-		return nil, err
-	}
-
 	config := &Config{
-		SSHKey:               string(pem),
-		PrivateKey:           wgKey,
-		IFaceBlackList:       []string{},
-		DisableIPv6Discovery: false,
-		NATExternalIPs:       input.NATExternalIPs,
-		CustomDNSAddress:     string(input.CustomDNSAddress),
+		// defaults to false only for new (post 0.26) configurations
+		ServerSSHAllowed: util.False(),
 	}
 
-	defaultManagementURL, err := parseURL("Management URL", DefaultManagementURL)
-	if err != nil {
+	if _, err := config.apply(input); err != nil {
 		return nil, err
 	}
 
-	config.ManagementURL = defaultManagementURL
-	if input.ManagementURL != "" {
-		URL, err := parseURL("Management URL", input.ManagementURL)
-		if err != nil {
-			return nil, err
-		}
-		config.ManagementURL = URL
-	}
-
-	config.WgPort = iface.DefaultWgPort
-	if input.WireguardPort != nil {
-		config.WgPort = *input.WireguardPort
-	}
-
-	config.WgIface = iface.WgInterfaceDefault
-	if input.InterfaceName != nil {
-		config.WgIface = *input.InterfaceName
-	}
-
-	if input.PreSharedKey != nil {
-		config.PreSharedKey = *input.PreSharedKey
-	}
-
-	if input.RosenpassEnabled != nil {
-		config.RosenpassEnabled = *input.RosenpassEnabled
-	}
-
-	defaultAdminURL, err := parseURL("Admin URL", DefaultAdminURL)
-	if err != nil {
-		return nil, err
-	}
-
-	config.AdminURL = defaultAdminURL
-	if input.AdminURL != "" {
-		newURL, err := parseURL("Admin Panel URL", input.AdminURL)
-		if err != nil {
-			return nil, err
-		}
-		config.AdminURL = newURL
-	}
-
-	config.IFaceBlackList = defaultInterfaceBlacklist
 	return config, nil
 }
 
@@ -211,77 +200,12 @@ func update(input ConfigInput) (*Config, error) {
 		return nil, err
 	}
 
-	refresh := false
-
-	if input.ManagementURL != "" && config.ManagementURL.String() != input.ManagementURL {
-		log.Infof("new Management URL provided, updated to %s (old value %s)",
-			input.ManagementURL, config.ManagementURL)
-		newURL, err := parseURL("Management URL", input.ManagementURL)
-		if err != nil {
-			return nil, err
-		}
-		config.ManagementURL = newURL
-		refresh = true
+	updated, err := config.apply(input)
+	if err != nil {
+		return nil, err
 	}
 
-	if input.AdminURL != "" && (config.AdminURL == nil || config.AdminURL.String() != input.AdminURL) {
-		log.Infof("new Admin Panel URL provided, updated to %s (old value %s)",
-			input.AdminURL, config.AdminURL)
-		newURL, err := parseURL("Admin Panel URL", input.AdminURL)
-		if err != nil {
-			return nil, err
-		}
-		config.AdminURL = newURL
-		refresh = true
-	}
-
-	if input.PreSharedKey != nil && config.PreSharedKey != *input.PreSharedKey {
-		log.Infof("new pre-shared key provided, replacing old key")
-		config.PreSharedKey = *input.PreSharedKey
-		refresh = true
-	}
-
-	if config.SSHKey == "" {
-		pem, err := ssh.GeneratePrivateKey(ssh.ED25519)
-		if err != nil {
-			return nil, err
-		}
-		config.SSHKey = string(pem)
-		refresh = true
-	}
-
-	if config.WgPort == 0 {
-		config.WgPort = iface.DefaultWgPort
-		refresh = true
-	}
-
-	if input.WireguardPort != nil {
-		config.WgPort = *input.WireguardPort
-		refresh = true
-	}
-
-	if input.InterfaceName != nil {
-		config.WgIface = *input.InterfaceName
-		refresh = true
-	}
-
-	if input.NATExternalIPs != nil && len(config.NATExternalIPs) != len(input.NATExternalIPs) {
-		config.NATExternalIPs = input.NATExternalIPs
-		refresh = true
-	}
-
-	if input.CustomDNSAddress != nil {
-		config.CustomDNSAddress = string(input.CustomDNSAddress)
-		refresh = true
-	}
-
-	if input.RosenpassEnabled != nil {
-		config.RosenpassEnabled = *input.RosenpassEnabled
-		refresh = true
-	}
-
-	if refresh {
-		// since we have new management URL, we need to update config file
+	if updated {
 		if err := util.WriteJson(input.ConfigPath, config); err != nil {
 			return nil, err
 		}
@@ -290,6 +214,210 @@ func update(input ConfigInput) (*Config, error) {
 	return config, nil
 }
 
+func (config *Config) apply(input ConfigInput) (updated bool, err error) {
+	if config.ManagementURL == nil {
+		log.Infof("using default Management URL %s", DefaultManagementURL)
+		config.ManagementURL, err = parseURL("Management URL", DefaultManagementURL)
+		if err != nil {
+			return false, err
+		}
+	}
+	if input.ManagementURL != "" && input.ManagementURL != config.ManagementURL.String() {
+		log.Infof("new Management URL provided, updated to %#v (old value %#v)",
+			input.ManagementURL, config.ManagementURL.String())
+		URL, err := parseURL("Management URL", input.ManagementURL)
+		if err != nil {
+			return false, err
+		}
+		config.ManagementURL = URL
+		updated = true
+	} else if config.ManagementURL == nil {
+		log.Infof("using default Management URL %s", DefaultManagementURL)
+		config.ManagementURL, err = parseURL("Management URL", DefaultManagementURL)
+		if err != nil {
+			return false, err
+		}
+	}
+
+	if config.AdminURL == nil {
+		log.Infof("using default Admin URL %s", DefaultManagementURL)
+		config.AdminURL, err = parseURL("Admin URL", DefaultAdminURL)
+		if err != nil {
+			return false, err
+		}
+	}
+	if input.AdminURL != "" && input.AdminURL != config.AdminURL.String() {
+		log.Infof("new Admin Panel URL provided, updated to %#v (old value %#v)",
+			input.AdminURL, config.AdminURL.String())
+		newURL, err := parseURL("Admin Panel URL", input.AdminURL)
+		if err != nil {
+			return updated, err
+		}
+		config.AdminURL = newURL
+		updated = true
+	}
+
+	if config.PrivateKey == "" {
+		log.Infof("generated new Wireguard key")
+		config.PrivateKey = generateKey()
+		updated = true
+	}
+
+	if config.SSHKey == "" {
+		log.Infof("generated new SSH key")
+		pem, err := ssh.GeneratePrivateKey(ssh.ED25519)
+		if err != nil {
+			return false, err
+		}
+		config.SSHKey = string(pem)
+		updated = true
+	}
+
+	if input.WireguardPort != nil && *input.WireguardPort != config.WgPort {
+		log.Infof("updating Wireguard port %d (old value %d)",
+			*input.WireguardPort, config.WgPort)
+		config.WgPort = *input.WireguardPort
+		updated = true
+	} else if config.WgPort == 0 {
+		config.WgPort = iface.DefaultWgPort
+		log.Infof("using default Wireguard port %d", config.WgPort)
+		updated = true
+	}
+
+	if input.InterfaceName != nil && *input.InterfaceName != config.WgIface {
+		log.Infof("updating Wireguard interface %#v (old value %#v)",
+			*input.InterfaceName, config.WgIface)
+		config.WgIface = *input.InterfaceName
+		updated = true
+	} else if config.WgIface == "" {
+		config.WgIface = iface.WgInterfaceDefault
+		log.Infof("using default Wireguard interface %s", config.WgIface)
+		updated = true
+	}
+
+	if input.NATExternalIPs != nil && !reflect.DeepEqual(config.NATExternalIPs, input.NATExternalIPs) {
+		log.Infof("updating NAT External IP [ %s ] (old value: [ %s ])",
+			strings.Join(input.NATExternalIPs, " "),
+			strings.Join(config.NATExternalIPs, " "))
+		config.NATExternalIPs = input.NATExternalIPs
+		updated = true
+	}
+
+	if input.PreSharedKey != nil && *input.PreSharedKey != config.PreSharedKey {
+		log.Infof("new pre-shared key provided, replacing old key")
+		config.PreSharedKey = *input.PreSharedKey
+		updated = true
+	}
+
+	if input.RosenpassEnabled != nil && *input.RosenpassEnabled != config.RosenpassEnabled {
+		log.Infof("switching Rosenpass to %t", *input.RosenpassEnabled)
+		config.RosenpassEnabled = *input.RosenpassEnabled
+		updated = true
+	}
+
+	if input.RosenpassPermissive != nil && *input.RosenpassPermissive != config.RosenpassPermissive {
+		log.Infof("switching Rosenpass permissive to %t", *input.RosenpassPermissive)
+		config.RosenpassPermissive = *input.RosenpassPermissive
+		updated = true
+	}
+
+	if input.NetworkMonitor != nil && input.NetworkMonitor != config.NetworkMonitor {
+		log.Infof("switching Network Monitor to %t", *input.NetworkMonitor)
+		config.NetworkMonitor = input.NetworkMonitor
+		updated = true
+	}
+
+	if config.NetworkMonitor == nil {
+		// enable network monitoring by default on windows and darwin clients
+		if runtime.GOOS == "windows" || runtime.GOOS == "darwin" {
+			enabled := true
+			config.NetworkMonitor = &enabled
+			updated = true
+		}
+	}
+
+	if input.CustomDNSAddress != nil && string(input.CustomDNSAddress) != config.CustomDNSAddress {
+		log.Infof("updating custom DNS address %#v (old value %#v)",
+			string(input.CustomDNSAddress), config.CustomDNSAddress)
+		config.CustomDNSAddress = string(input.CustomDNSAddress)
+		updated = true
+	}
+
+	if len(config.IFaceBlackList) == 0 {
+		log.Infof("filling in interface blacklist with defaults: [ %s ]",
+			strings.Join(defaultInterfaceBlacklist, " "))
+		config.IFaceBlackList = append(config.IFaceBlackList, defaultInterfaceBlacklist...)
+		updated = true
+	}
+
+	if len(input.ExtraIFaceBlackList) > 0 {
+		for _, iFace := range util.SliceDiff(input.ExtraIFaceBlackList, config.IFaceBlackList) {
+			log.Infof("adding new entry to interface blacklist: %s", iFace)
+			config.IFaceBlackList = append(config.IFaceBlackList, iFace)
+			updated = true
+		}
+	}
+
+	if input.DisableAutoConnect != nil && *input.DisableAutoConnect != config.DisableAutoConnect {
+		if *input.DisableAutoConnect {
+			log.Infof("turning off automatic connection on startup")
+		} else {
+			log.Infof("enabling automatic connection on startup")
+		}
+		config.DisableAutoConnect = *input.DisableAutoConnect
+		updated = true
+	}
+
+	if input.ServerSSHAllowed != nil && *input.ServerSSHAllowed != *config.ServerSSHAllowed {
+		if *input.ServerSSHAllowed {
+			log.Infof("enabling SSH server")
+		} else {
+			log.Infof("disabling SSH server")
+		}
+		config.ServerSSHAllowed = input.ServerSSHAllowed
+		updated = true
+	} else if config.ServerSSHAllowed == nil {
+		// enables SSH for configs from old versions to preserve backwards compatibility
+		log.Infof("falling back to enabled SSH server for pre-existing configuration")
+		config.ServerSSHAllowed = util.True()
+		updated = true
+	}
+
+	if input.DNSRouteInterval != nil && *input.DNSRouteInterval != config.DNSRouteInterval {
+		log.Infof("updating DNS route interval to %s (old value %s)",
+			input.DNSRouteInterval.String(), config.DNSRouteInterval.String())
+		config.DNSRouteInterval = *input.DNSRouteInterval
+		updated = true
+	} else if config.DNSRouteInterval == 0 {
+		config.DNSRouteInterval = dynamic.DefaultInterval
+		log.Infof("using default DNS route interval %s", config.DNSRouteInterval)
+		updated = true
+
+	}
+
+	if input.ClientCertKeyPath != "" {
+		config.ClientCertKeyPath = input.ClientCertKeyPath
+		updated = true
+	}
+
+	if input.ClientCertPath != "" {
+		config.ClientCertPath = input.ClientCertPath
+		updated = true
+	}
+
+	if config.ClientCertPath != "" && config.ClientCertKeyPath != "" {
+		cert, err := tls.LoadX509KeyPair(config.ClientCertPath, config.ClientCertKeyPath)
+		if err != nil {
+			log.Error("Failed to load mTLS cert/key pair: ", err)
+		} else {
+			config.ClientCertKeyPair = &cert
+			log.Info("Loaded client mTLS cert/key pair")
+		}
+	}
+
+	return updated, nil
+}
+
 // parseURL parses and validates a service URL
 func parseURL(serviceName, serviceURL string) (*url.URL, error) {
 	parsedMgmtURL, err := url.ParseRequestURI(serviceURL)
@@ -344,7 +472,6 @@ func configFileIsExists(path string) bool {
 // If it can switch, then it updates the config and returns a new one. Otherwise, it returns the provided config.
 // The check is performed only for the NetBird's managed version.
 func UpdateOldManagementURL(ctx context.Context, config *Config, configPath string) (*Config, error) {
-
 	defaultManagementURL, err := parseURL("Management URL", DefaultManagementURL)
 	if err != nil {
 		return nil, err

client/internal/config_test.go

@@ -18,7 +18,6 @@ func TestGetConfig(t *testing.T) {
 	config, err := UpdateOrCreateConfig(ConfigInput{
 		ConfigPath: filepath.Join(t.TempDir(), "config.json"),
 	})
-
 	if err != nil {
 		return
 	}
@@ -86,6 +85,26 @@ func TestGetConfig(t *testing.T) {
 	assert.Equal(t, readConf.(*Config).ManagementURL.String(), newManagementURL)
 }
 
+func TestExtraIFaceBlackList(t *testing.T) {
+	extraIFaceBlackList := []string{"eth1"}
+	path := filepath.Join(t.TempDir(), "config.json")
+	config, err := UpdateOrCreateConfig(ConfigInput{
+		ConfigPath:          path,
+		ExtraIFaceBlackList: extraIFaceBlackList,
+	})
+	if err != nil {
+		return
+	}
+
+	assert.Contains(t, config.IFaceBlackList, "eth1")
+	readConf, err := util.ReadJson(path, config)
+	if err != nil {
+		return
+	}
+
+	assert.Contains(t, readConf.(*Config).IFaceBlackList, "eth1")
+}
+
 func TestHiddenPreSharedKey(t *testing.T) {
 	hidden := "**********"
 	samplePreSharedKey := "mysecretpresharedkey"
@@ -111,7 +130,6 @@ func TestHiddenPreSharedKey(t *testing.T) {
 				ConfigPath:   cfgFile,
 				PreSharedKey: tt.preSharedKey,
 			})
-
 			if err != nil {
 				t.Fatalf("failed to get cfg: %s", err)
 			}

client/internal/connect.go

@@ -2,8 +2,13 @@ package internal
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"net"
+	"runtime"
+	"runtime/debug"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/cenkalti/backoff/v4"
@@ -21,33 +26,50 @@ import (
 	"github.com/netbirdio/netbird/iface"
 	mgm "github.com/netbirdio/netbird/management/client"
 	mgmProto "github.com/netbirdio/netbird/management/proto"
+	"github.com/netbirdio/netbird/relay/auth/hmac"
+	relayClient "github.com/netbirdio/netbird/relay/client"
 	signal "github.com/netbirdio/netbird/signal/client"
+	"github.com/netbirdio/netbird/util"
 	"github.com/netbirdio/netbird/version"
 )
 
-// RunClient with main logic.
-func RunClient(ctx context.Context, config *Config, statusRecorder *peer.Status) error {
-	return runClient(ctx, config, statusRecorder, MobileDependency{}, nil, nil, nil, nil)
+type ConnectClient struct {
+	ctx            context.Context
+	config         *Config
+	statusRecorder *peer.Status
+	engine         *Engine
+	engineMutex    sync.Mutex
 }
 
-// RunClientWithProbes runs the client's main logic with probes attached
-func RunClientWithProbes(
+func NewConnectClient(
 	ctx context.Context,
 	config *Config,
 	statusRecorder *peer.Status,
-	mgmProbe *Probe,
-	signalProbe *Probe,
-	relayProbe *Probe,
-	wgProbe *Probe,
+
+) *ConnectClient {
+	return &ConnectClient{
+		ctx:            ctx,
+		config:         config,
+		statusRecorder: statusRecorder,
+		engineMutex:    sync.Mutex{},
+	}
+}
+
+// Run with main logic.
+func (c *ConnectClient) Run() error {
+	return c.run(MobileDependency{}, nil, nil)
+}
+
+// RunWithProbes runs the client's main logic with probes attached
+func (c *ConnectClient) RunWithProbes(
+	probes *ProbeHolder,
+	runningChan chan error,
 ) error {
-	return runClient(ctx, config, statusRecorder, MobileDependency{}, mgmProbe, signalProbe, relayProbe, wgProbe)
+	return c.run(MobileDependency{}, probes, runningChan)
 }
 
-// RunClientMobile with main logic on mobile system
-func RunClientMobile(
-	ctx context.Context,
-	config *Config,
-	statusRecorder *peer.Status,
+// RunOnAndroid with main logic on mobile system
+func (c *ConnectClient) RunOnAndroid(
 	tunAdapter iface.TunAdapter,
 	iFaceDiscover stdnet.ExternalIFaceDiscover,
 	networkChangeListener listener.NetworkChangeListener,
@@ -62,36 +84,43 @@ func RunClientMobile(
 		HostDNSAddresses:      dnsAddresses,
 		DnsReadyListener:      dnsReadyListener,
 	}
-	return runClient(ctx, config, statusRecorder, mobileDependency, nil, nil, nil, nil)
+	return c.run(mobileDependency, nil, nil)
 }
 
-func RunClientiOS(
-	ctx context.Context,
-	config *Config,
-	statusRecorder *peer.Status,
+func (c *ConnectClient) RunOniOS(
 	fileDescriptor int32,
 	networkChangeListener listener.NetworkChangeListener,
 	dnsManager dns.IosDnsManager,
 ) error {
+	// Set GC percent to 5% to reduce memory usage as iOS only allows 50MB of memory for the extension.
+	debug.SetGCPercent(5)
+
 	mobileDependency := MobileDependency{
 		FileDescriptor:        fileDescriptor,
 		NetworkChangeListener: networkChangeListener,
 		DnsManager:            dnsManager,
 	}
-	return runClient(ctx, config, statusRecorder, mobileDependency, nil, nil, nil, nil)
+	return c.run(mobileDependency, nil, nil)
 }
 
-func runClient(
-	ctx context.Context,
-	config *Config,
-	statusRecorder *peer.Status,
+func (c *ConnectClient) run(
 	mobileDependency MobileDependency,
-	mgmProbe *Probe,
-	signalProbe *Probe,
-	relayProbe *Probe,
-	wgProbe *Probe,
+	probes *ProbeHolder,
+	runningChan chan error,
 ) error {
-	log.Infof("starting NetBird client version %s", version.NetbirdVersion())
+	defer func() {
+		if r := recover(); r != nil {
+			log.Panicf("Panic occurred: %v, stack trace: %s", r, string(debug.Stack()))
+		}
+	}()
+
+	log.Infof("starting NetBird client version %s on %s/%s", version.NetbirdVersion(), runtime.GOOS, runtime.GOARCH)
+
+	// Check if client was not shut down in a clean way and restore DNS config if required.
+	// Otherwise, we might not be able to connect to the management server to retrieve new config.
+	if err := dns.CheckUncleanShutdown(c.config.WgIface); err != nil {
+		log.Errorf("checking unclean shutdown error: %s", err)
+	}
 
 	backOff := &backoff.ExponentialBackOff{
 		InitialInterval:     time.Second,
@@ -103,7 +132,7 @@ func runClient(
 		Clock:               backoff.SystemClock,
 	}
 
-	state := CtxGetState(ctx)
+	state := CtxGetState(c.ctx)
 	defer func() {
 		s, err := state.Status()
 		if err != nil || s != StatusNeedsLogin {
@@ -112,52 +141,49 @@ func runClient(
 	}()
 
 	wrapErr := state.Wrap
-	myPrivateKey, err := wgtypes.ParseKey(config.PrivateKey)
+	myPrivateKey, err := wgtypes.ParseKey(c.config.PrivateKey)
 	if err != nil {
-		log.Errorf("failed parsing Wireguard key %s: [%s]", config.PrivateKey, err.Error())
+		log.Errorf("failed parsing Wireguard key %s: [%s]", c.config.PrivateKey, err.Error())
 		return wrapErr(err)
 	}
 
 	var mgmTlsEnabled bool
-	if config.ManagementURL.Scheme == "https" {
+	if c.config.ManagementURL.Scheme == "https" {
 		mgmTlsEnabled = true
 	}
 
-	publicSSHKey, err := ssh.GeneratePublicKey([]byte(config.SSHKey))
+	publicSSHKey, err := ssh.GeneratePublicKey([]byte(c.config.SSHKey))
 	if err != nil {
 		return err
 	}
 
-	defer statusRecorder.ClientStop()
+	defer c.statusRecorder.ClientStop()
 	operation := func() error {
 		// if context cancelled we not start new backoff cycle
-		select {
-		case <-ctx.Done():
+		if c.isContextCancelled() {
 			return nil
-		default:
 		}
 
 		state.Set(StatusConnecting)
 
-		engineCtx, cancel := context.WithCancel(ctx)
+		engineCtx, cancel := context.WithCancel(c.ctx)
 		defer func() {
-			statusRecorder.MarkManagementDisconnected(state.err)
-			statusRecorder.CleanLocalPeerState()
+			c.statusRecorder.MarkManagementDisconnected(state.err)
+			c.statusRecorder.CleanLocalPeerState()
 			cancel()
 		}()
 
-		log.Debugf("connecting to the Management service %s", config.ManagementURL.Host)
-		mgmClient, err := mgm.NewClient(engineCtx, config.ManagementURL.Host, myPrivateKey, mgmTlsEnabled)
+		log.Debugf("connecting to the Management service %s", c.config.ManagementURL.Host)
+		mgmClient, err := mgm.NewClient(engineCtx, c.config.ManagementURL.Host, myPrivateKey, mgmTlsEnabled)
 		if err != nil {
 			return wrapErr(gstatus.Errorf(codes.FailedPrecondition, "failed connecting to Management Service : %s", err))
 		}
-		mgmNotifier := statusRecorderToMgmConnStateNotifier(statusRecorder)
+		mgmNotifier := statusRecorderToMgmConnStateNotifier(c.statusRecorder)
 		mgmClient.SetConnStateListener(mgmNotifier)
 
-		log.Debugf("connected to the Management service %s", config.ManagementURL.Host)
+		log.Debugf("connected to the Management service %s", c.config.ManagementURL.Host)
 		defer func() {
-			err = mgmClient.Close()
-			if err != nil {
+			if err = mgmClient.Close(); err != nil {
 				log.Warnf("failed to close the Management service client %v", err)
 			}
 		}()
@@ -168,11 +194,12 @@ func runClient(
 			log.Debug(err)
 			if s, ok := gstatus.FromError(err); ok && (s.Code() == codes.PermissionDenied) {
 				state.Set(StatusNeedsLogin)
+				_ = c.Stop()
 				return backoff.Permanent(wrapErr(err)) // unrecoverable error
 			}
 			return wrapErr(err)
 		}
-		statusRecorder.MarkManagementConnected()
+		c.statusRecorder.MarkManagementConnected()
 
 		localPeerState := peer.LocalPeerState{
 			IP:              loginResp.GetPeerConfig().GetAddress(),
@@ -180,19 +207,18 @@ func runClient(
 			KernelInterface: iface.WireGuardModuleIsLoaded(),
 			FQDN:            loginResp.GetPeerConfig().GetFqdn(),
 		}
-
-		statusRecorder.UpdateLocalPeerState(localPeerState)
+		c.statusRecorder.UpdateLocalPeerState(localPeerState)
 
 		signalURL := fmt.Sprintf("%s://%s",
 			strings.ToLower(loginResp.GetWiretrusteeConfig().GetSignal().GetProtocol().String()),
 			loginResp.GetWiretrusteeConfig().GetSignal().GetUri(),
 		)
 
-		statusRecorder.UpdateSignalAddress(signalURL)
+		c.statusRecorder.UpdateSignalAddress(signalURL)
 
-		statusRecorder.MarkSignalDisconnected(nil)
+		c.statusRecorder.MarkSignalDisconnected(nil)
 		defer func() {
-			statusRecorder.MarkSignalDisconnected(state.err)
+			c.statusRecorder.MarkSignalDisconnected(state.err)
 		}()
 
 		// with the global Wiretrustee config in hand connect (just a connection, no stream yet) Signal
@@ -208,63 +234,136 @@ func runClient(
 			}
 		}()
 
-		signalNotifier := statusRecorderToSignalConnStateNotifier(statusRecorder)
+		signalNotifier := statusRecorderToSignalConnStateNotifier(c.statusRecorder)
 		signalClient.SetConnStateListener(signalNotifier)
 
-		statusRecorder.MarkSignalConnected()
+		c.statusRecorder.MarkSignalConnected()
+
+		relayURLs, token := parseRelayInfo(loginResp)
+		relayManager := relayClient.NewManager(engineCtx, relayURLs, myPrivateKey.PublicKey().String())
+		if len(relayURLs) > 0 {
+			if token != nil {
+				if err := relayManager.UpdateToken(token); err != nil {
+					log.Errorf("failed to update token: %s", err)
+					return wrapErr(err)
+				}
+			}
+			log.Infof("connecting to the Relay service(s): %s", strings.Join(relayURLs, ", "))
+			if err = relayManager.Serve(); err != nil {
+				log.Error(err)
+				return wrapErr(err)
+			}
+			c.statusRecorder.SetRelayMgr(relayManager)
+		}
 
 		peerConfig := loginResp.GetPeerConfig()
 
-		engineConfig, err := createEngineConfig(myPrivateKey, config, peerConfig)
+		engineConfig, err := createEngineConfig(myPrivateKey, c.config, peerConfig)
 		if err != nil {
 			log.Error(err)
 			return wrapErr(err)
 		}
 
-		engine := NewEngineWithProbes(engineCtx, cancel, signalClient, mgmClient, engineConfig, mobileDependency, statusRecorder, mgmProbe, signalProbe, relayProbe, wgProbe)
-		err = engine.Start()
-		if err != nil {
+		checks := loginResp.GetChecks()
+
+		c.engineMutex.Lock()
+		c.engine = NewEngineWithProbes(engineCtx, cancel, signalClient, mgmClient, relayManager, engineConfig, mobileDependency, c.statusRecorder, probes, checks)
+
+		c.engineMutex.Unlock()
+
+		if err := c.engine.Start(); err != nil {
 			log.Errorf("error while starting Netbird Connection Engine: %s", err)
 			return wrapErr(err)
 		}
 
-		log.Print("Netbird engine started, my IP is: ", peerConfig.Address)
+		log.Infof("Netbird engine started, the IP is: %s", peerConfig.GetAddress())
 		state.Set(StatusConnected)
 
+		if runningChan != nil {
+			runningChan <- nil
+			close(runningChan)
+		}
+
 		<-engineCtx.Done()
-		statusRecorder.ClientTeardown()
+		c.statusRecorder.ClientTeardown()
 
 		backOff.Reset()
 
-		err = engine.Stop()
-		if err != nil {
-			log.Errorf("failed stopping engine %v", err)
-			return wrapErr(err)
-		}
-
 		log.Info("stopped NetBird client")
 
-		if _, err := state.Status(); err == ErrResetConnection {
+		if _, err := state.Status(); errors.Is(err, ErrResetConnection) {
 			return err
 		}
 
 		return nil
 	}
 
-	statusRecorder.ClientStart()
+	c.statusRecorder.ClientStart()
 	err = backoff.Retry(operation, backOff)
 	if err != nil {
 		log.Debugf("exiting client retry loop due to unrecoverable error: %s", err)
 		if s, ok := gstatus.FromError(err); ok && (s.Code() == codes.PermissionDenied) {
 			state.Set(StatusNeedsLogin)
+			_ = c.Stop()
 		}
 		return err
 	}
 	return nil
 }
 
+func parseRelayInfo(loginResp *mgmProto.LoginResponse) ([]string, *hmac.Token) {
+	relayCfg := loginResp.GetWiretrusteeConfig().GetRelay()
+	if relayCfg == nil {
+		return nil, nil
+	}
+
+	token := &hmac.Token{
+		Payload:   relayCfg.GetTokenPayload(),
+		Signature: relayCfg.GetTokenSignature(),
+	}
+
+	return relayCfg.GetUrls(), token
+}
+
+func (c *ConnectClient) Engine() *Engine {
+	if c == nil {
+		return nil
+	}
+	var e *Engine
+	c.engineMutex.Lock()
+	e = c.engine
+	c.engineMutex.Unlock()
+	return e
+}
+
+func (c *ConnectClient) Stop() error {
+	if c == nil {
+		return nil
+	}
+	c.engineMutex.Lock()
+	defer c.engineMutex.Unlock()
+
+	if c.engine == nil {
+		return nil
+	}
+	return c.engine.Stop()
+}
+
+func (c *ConnectClient) isContextCancelled() bool {
+	select {
+	case <-c.ctx.Done():
+		return true
+	default:
+		return false
+	}
+}
+
 // createEngineConfig converts configuration received from Management Service to EngineConfig
 func createEngineConfig(key wgtypes.Key, config *Config, peerConfig *mgmProto.PeerConfig) (*EngineConfig, error) {
+	nm := false
+	if config.NetworkMonitor != nil {
+		nm = *config.NetworkMonitor
+	}
 	engineConf := &EngineConfig{
 		WgIfaceName:          config.WgIface,
 		WgAddr:               peerConfig.Address,
@@ -272,10 +371,14 @@ func createEngineConfig(key wgtypes.Key, config *Config, peerConfig *mgmProto.Pe
 		DisableIPv6Discovery: config.DisableIPv6Discovery,
 		WgPrivateKey:         key,
 		WgPort:               config.WgPort,
+		NetworkMonitor:       nm,
 		SSHKey:               []byte(config.SSHKey),
 		NATExternalIPs:       config.NATExternalIPs,
 		CustomDNSAddress:     config.CustomDNSAddress,
 		RosenpassEnabled:     config.RosenpassEnabled,
+		RosenpassPermissive:  config.RosenpassPermissive,
+		ServerSSHAllowed:     util.ReturnBoolWithDefaultTrue(config.ServerSSHAllowed),
+		DNSRouteInterval:     config.DNSRouteInterval,
 	}
 
 	if config.PreSharedKey != "" {
@@ -286,6 +389,15 @@ func createEngineConfig(key wgtypes.Key, config *Config, peerConfig *mgmProto.Pe
 		engineConf.PreSharedKey = &preSharedKey
 	}
 
+	port, err := freePort(config.WgPort)
+	if err != nil {
+		return nil, err
+	}
+	if port != config.WgPort {
+		log.Infof("using %d as wireguard port: %d is in use", port, config.WgPort)
+	}
+	engineConf.WgPort = port
+
 	return engineConf, nil
 }
 
@@ -335,3 +447,44 @@ func statusRecorderToSignalConnStateNotifier(statusRecorder *peer.Status) signal
 	notifier, _ := sri.(signal.ConnStateNotifier)
 	return notifier
 }
+
+// freePort attempts to determine if the provided port is available, if not it will ask the system for a free port.
+func freePort(initPort int) (int, error) {
+	addr := net.UDPAddr{}
+	if initPort == 0 {
+		initPort = iface.DefaultWgPort
+	}
+
+	addr.Port = initPort
+
+	conn, err := net.ListenUDP("udp", &addr)
+	if err == nil {
+		closeConnWithLog(conn)
+		return initPort, nil
+	}
+
+	// if the port is already in use, ask the system for a free port
+	addr.Port = 0
+	conn, err = net.ListenUDP("udp", &addr)
+	if err != nil {
+		return 0, fmt.Errorf("unable to get a free port: %v", err)
+	}
+
+	udpAddr, ok := conn.LocalAddr().(*net.UDPAddr)
+	if !ok {
+		return 0, errors.New("wrong address type when getting a free port")
+	}
+	closeConnWithLog(conn)
+	return udpAddr.Port, nil
+}
+
+func closeConnWithLog(conn *net.UDPConn) {
+	startClosing := time.Now()
+	err := conn.Close()
+	if err != nil {
+		log.Warnf("closing probe port %d failed: %v. NetBird will still attempt to use this port for connection.", conn.LocalAddr().(*net.UDPAddr).Port, err)
+	}
+	if time.Since(startClosing) > time.Second {
+		log.Warnf("closing the testing port %d took %s. Usually it is safe to ignore, but continuous warnings may indicate a problem.", conn.LocalAddr().(*net.UDPAddr).Port, time.Since(startClosing))
+	}
+}

client/internal/connect_test.go

@@ -0,0 +1,61 @@
+package internal
+
+import (
+	"net"
+	"testing"
+)
+
+func Test_freePort(t *testing.T) {
+	tests := []struct {
+		name        string
+		port        int
+		want        int
+		shouldMatch bool
+	}{
+		{
+			name:        "not provided, fallback to default",
+			port:        0,
+			want:        51820,
+			shouldMatch: true,
+		},
+		{
+			name:        "provided and available",
+			port:        51821,
+			want:        51821,
+			shouldMatch: true,
+		},
+		{
+			name:        "provided and not available",
+			port:        51830,
+			want:        51830,
+			shouldMatch: false,
+		},
+	}
+	c1, err := net.ListenUDP("udp", &net.UDPAddr{Port: 51830})
+	if err != nil {
+		t.Errorf("freePort error = %v", err)
+	}
+	defer func(c1 *net.UDPConn) {
+		_ = c1.Close()
+	}(c1)
+
+	for _, tt := range tests {
+
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := freePort(tt.port)
+
+			if err != nil {
+				t.Errorf("got an error while getting free port: %v", err)
+			}
+
+			if tt.shouldMatch && got != tt.want {
+				t.Errorf("got a different port %v, want %v", got, tt.want)
+			}
+
+			if !tt.shouldMatch && got == tt.want {
+				t.Errorf("got the same port %v, want a different port", tt.want)
+			}
+		})
+
+	}
+}

client/internal/dns/consts_freebsd.go

@@ -0,0 +1,6 @@
+package dns
+
+const (
+	fileUncleanShutdownResolvConfLocation  = "/var/db/netbird/resolv.conf"
+	fileUncleanShutdownManagerTypeLocation = "/var/db/netbird/manager"
+)

client/internal/dns/consts_linux.go

@@ -0,0 +1,8 @@
+//go:build !android
+
+package dns
+
+const (
+	fileUncleanShutdownResolvConfLocation  = "/var/lib/netbird/resolv.conf"
+	fileUncleanShutdownManagerTypeLocation = "/var/lib/netbird/manager"
+)

client/internal/dns/dbus_unix.go

@@ -1,12 +1,14 @@
-//go:build !android
+//go:build (linux && !android) || freebsd
 
 package dns
 
 import (
 	"context"
+	"fmt"
+	"time"
+
 	"github.com/godbus/dbus/v5"
 	log "github.com/sirupsen/logrus"
-	"time"
 )
 
 const dbusDefaultFlag = 0
@@ -14,6 +16,7 @@ const dbusDefaultFlag = 0
 func isDbusListenerRunning(dest string, path dbus.ObjectPath) bool {
 	obj, closeConn, err := getDbusObject(dest, path)
 	if err != nil {
+		log.Tracef("error getting dbus object: %s", err)
 		return false
 	}
 	defer closeConn()
@@ -21,14 +24,18 @@ func isDbusListenerRunning(dest string, path dbus.ObjectPath) bool {
 	ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
 	defer cancel()
 
-	err = obj.CallWithContext(ctx, "org.freedesktop.DBus.Peer.Ping", 0).Store()
-	return err == nil
+	if err = obj.CallWithContext(ctx, "org.freedesktop.DBus.Peer.Ping", 0).Store(); err != nil {
+		log.Tracef("error calling dbus: %s", err)
+		return false
+	}
+
+	return true
 }
 
 func getDbusObject(dest string, path dbus.ObjectPath) (dbus.BusObject, func(), error) {
 	conn, err := dbus.SystemBus()
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, fmt.Errorf("get dbus: %w", err)
 	}
 	obj := conn.Object(dest, path)
 

client/internal/dns/file_parser_linux.go

@@ -1,105 +0,0 @@
-//go:build !android
-
-package dns
-
-import (
-	"fmt"
-	"os"
-	"strings"
-
-	log "github.com/sirupsen/logrus"
-)
-
-const (
-	defaultResolvConfPath = "/etc/resolv.conf"
-)
-
-type resolvConf struct {
-	nameServers   []string
-	searchDomains []string
-	others        []string
-}
-
-func (r *resolvConf) String() string {
-	return fmt.Sprintf("search domains: %v, name servers: %v, others: %s", r.searchDomains, r.nameServers, r.others)
-}
-
-func parseDefaultResolvConf() (*resolvConf, error) {
-	return parseResolvConfFile(defaultResolvConfPath)
-}
-
-func parseBackupResolvConf() (*resolvConf, error) {
-	return parseResolvConfFile(fileDefaultResolvConfBackupLocation)
-}
-
-func parseResolvConfFile(resolvConfFile string) (*resolvConf, error) {
-	file, err := os.Open(resolvConfFile)
-	if err != nil {
-		return nil, fmt.Errorf("failed to open %s file: %w", resolvConfFile, err)
-	}
-	defer func() {
-		if err := file.Close(); err != nil {
-			log.Errorf("failed closing %s: %s", resolvConfFile, err)
-		}
-	}()
-
-	cur, err := os.ReadFile(resolvConfFile)
-	if err != nil {
-		return nil, fmt.Errorf("failed to read %s file: %w", resolvConfFile, err)
-	}
-
-	if len(cur) == 0 {
-		return nil, fmt.Errorf("file is empty")
-	}
-
-	rconf := &resolvConf{
-		searchDomains: make([]string, 0),
-		nameServers:   make([]string, 0),
-		others:        make([]string, 0),
-	}
-
-	for _, line := range strings.Split(string(cur), "\n") {
-		line = strings.TrimSpace(line)
-
-		if strings.HasPrefix(line, "#") {
-			continue
-		}
-
-		if strings.HasPrefix(line, "domain") {
-			continue
-		}
-
-		if strings.HasPrefix(line, "options") && strings.Contains(line, "rotate") {
-			line = strings.ReplaceAll(line, "rotate", "")
-			splitLines := strings.Fields(line)
-			if len(splitLines) == 1 {
-				continue
-			}
-			line = strings.Join(splitLines, " ")
-		}
-
-		if strings.HasPrefix(line, "search") {
-			splitLines := strings.Fields(line)
-			if len(splitLines) < 2 {
-				continue
-			}
-
-			rconf.searchDomains = splitLines[1:]
-			continue
-		}
-
-		if strings.HasPrefix(line, "nameserver") {
-			splitLines := strings.Fields(line)
-			if len(splitLines) != 2 {
-				continue
-			}
-			rconf.nameServers = append(rconf.nameServers, splitLines[1])
-			continue
-		}
-
-		if line != "" {
-			rconf.others = append(rconf.others, line)
-		}
-	}
-	return rconf, nil
-}

client/internal/dns/file_parser_linux_test.go

@@ -1,149 +0,0 @@
-//go:build !android
-
-package dns
-
-import (
-	"fmt"
-	"os"
-	"testing"
-)
-
-func Test_parseResolvConf(t *testing.T) {
-	testCases := []struct {
-		input          string
-		expectedSearch []string
-		expectedNS     []string
-		expectedOther  []string
-	}{
-		{
-			input: `domain chello.hu
-search chello.hu
-nameserver 192.168.0.1
-`,
-			expectedSearch: []string{"chello.hu"},
-			expectedNS:     []string{"192.168.0.1"},
-			expectedOther:  []string{},
-		},
-		{
-			input: `# This is /run/systemd/resolve/resolv.conf managed by man:systemd-resolved(8).
-# Do not edit.
-#
-# This file might be symlinked as /etc/resolv.conf. If you're looking at
-# /etc/resolv.conf and seeing this text, you have followed the symlink.
-#
-# This is a dynamic resolv.conf file for connecting local clients directly to
-# all known uplink DNS servers. This file lists all configured search domains.
-#
-# Third party programs should typically not access this file directly, but only
-# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
-# different way, replace this symlink by a static file or a different symlink.
-#
-# See man:systemd-resolved.service(8) for details about the supported modes of
-# operation for /etc/resolv.conf.
-
-nameserver 192.168.2.1
-nameserver 100.81.99.197
-search netbird.cloud
-`,
-			expectedSearch: []string{"netbird.cloud"},
-			expectedNS:     []string{"192.168.2.1", "100.81.99.197"},
-			expectedOther:  []string{},
-		},
-		{
-			input: `# This is /run/systemd/resolve/resolv.conf managed by man:systemd-resolved(8).
-# Do not edit.
-#
-# This file might be symlinked as /etc/resolv.conf. If you're looking at
-# /etc/resolv.conf and seeing this text, you have followed the symlink.
-#
-# This is a dynamic resolv.conf file for connecting local clients directly to
-# all known uplink DNS servers. This file lists all configured search domains.
-#
-# Third party programs should typically not access this file directly, but only
-# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
-# different way, replace this symlink by a static file or a different symlink.
-#
-# See man:systemd-resolved.service(8) for details about the supported modes of
-# operation for /etc/resolv.conf.
-
-nameserver 192.168.2.1
-nameserver 100.81.99.197
-search netbird.cloud
-options debug
-`,
-			expectedSearch: []string{"netbird.cloud"},
-			expectedNS:     []string{"192.168.2.1", "100.81.99.197"},
-			expectedOther:  []string{"options debug"},
-		},
-		{
-			input: `# This is /run/systemd/resolve/resolv.conf managed by man:systemd-resolved(8).
-# Do not edit.
-#
-# This file might be symlinked as /etc/resolv.conf. If you're looking at
-# /etc/resolv.conf and seeing this text, you have followed the symlink.
-#
-# This is a dynamic resolv.conf file for connecting local clients directly to
-# all known uplink DNS servers. This file lists all configured search domains.
-#
-# Third party programs should typically not access this file directly, but only
-# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
-# different way, replace this symlink by a static file or a different symlink.
-#
-# See man:systemd-resolved.service(8) for details about the supported modes of
-# operation for /etc/resolv.conf.
-
-nameserver 192.168.2.1
-nameserver 100.81.99.197
-search netbird.cloud
-options debug
-options edns0 trust-ad
-`,
-			expectedSearch: []string{"netbird.cloud"},
-			expectedNS:     []string{"192.168.2.1", "100.81.99.197"},
-			expectedOther:  []string{"options debug", "options edns0 trust-ad"},
-		},
-	}
-
-	for _, testCase := range testCases {
-		testCase := testCase
-		t.Run("test", func(t *testing.T) {
-			t.Parallel()
-			tmpResolvConf := fmt.Sprintf("%s/%s", t.TempDir(), "resolv.conf")
-			err := os.WriteFile(tmpResolvConf, []byte(testCase.input), 0644)
-			if err != nil {
-				t.Fatal(err)
-			}
-			cfg, err := parseResolvConfFile(tmpResolvConf)
-			if err != nil {
-				t.Fatal(err)
-			}
-			ok := compareLists(cfg.searchDomains, testCase.expectedSearch)
-			if !ok {
-				t.Errorf("invalid parse result for search domains, expected: %v, got: %v", testCase.expectedSearch, cfg.searchDomains)
-			}
-
-			ok = compareLists(cfg.nameServers, testCase.expectedNS)
-			if !ok {
-				t.Errorf("invalid parse result for ns domains, expected: %v, got: %v", testCase.expectedNS, cfg.nameServers)
-			}
-
-			ok = compareLists(cfg.others, testCase.expectedOther)
-			if !ok {
-				t.Errorf("invalid parse result for others, expected: %v, got: %v", testCase.expectedOther, cfg.others)
-			}
-		})
-	}
-
-}
-
-func compareLists(search []string, search2 []string) bool {
-	if len(search) != len(search2) {
-		return false
-	}
-	for i, v := range search {
-		if v != search2[i] {
-			return false
-		}
-	}
-	return true
-}

client/internal/dns/file_parser_unix.go

@@ -0,0 +1,168 @@
+//go:build (linux && !android) || freebsd
+
+package dns
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	defaultResolvConfPath = "/etc/resolv.conf"
+)
+
+var timeoutRegex = regexp.MustCompile(`timeout:\d+`)
+var attemptsRegex = regexp.MustCompile(`attempts:\d+`)
+
+type resolvConf struct {
+	nameServers   []string
+	searchDomains []string
+	others        []string
+}
+
+func (r *resolvConf) String() string {
+	return fmt.Sprintf("search domains: %v, name servers: %v, others: %s", r.searchDomains, r.nameServers, r.others)
+}
+
+func parseDefaultResolvConf() (*resolvConf, error) {
+	return parseResolvConfFile(defaultResolvConfPath)
+}
+
+func parseBackupResolvConf() (*resolvConf, error) {
+	return parseResolvConfFile(fileDefaultResolvConfBackupLocation)
+}
+
+func parseResolvConfFile(resolvConfFile string) (*resolvConf, error) {
+	rconf := &resolvConf{
+		searchDomains: make([]string, 0),
+		nameServers:   make([]string, 0),
+		others:        make([]string, 0),
+	}
+
+	file, err := os.Open(resolvConfFile)
+	if err != nil {
+		return rconf, fmt.Errorf("failed to open %s file: %w", resolvConfFile, err)
+	}
+	defer func() {
+		if err := file.Close(); err != nil {
+			log.Errorf("failed closing %s: %s", resolvConfFile, err)
+		}
+	}()
+
+	cur, err := os.ReadFile(resolvConfFile)
+	if err != nil {
+		return rconf, fmt.Errorf("failed to read %s file: %w", resolvConfFile, err)
+	}
+
+	if len(cur) == 0 {
+		return rconf, fmt.Errorf("file is empty")
+	}
+
+	for _, line := range strings.Split(string(cur), "\n") {
+		line = strings.TrimSpace(line)
+
+		if strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		if strings.HasPrefix(line, "domain") {
+			continue
+		}
+
+		if strings.HasPrefix(line, "options") && strings.Contains(line, "rotate") {
+			line = strings.ReplaceAll(line, "rotate", "")
+			splitLines := strings.Fields(line)
+			if len(splitLines) == 1 {
+				continue
+			}
+			line = strings.Join(splitLines, " ")
+		}
+
+		if strings.HasPrefix(line, "search") {
+			splitLines := strings.Fields(line)
+			if len(splitLines) < 2 {
+				continue
+			}
+
+			rconf.searchDomains = splitLines[1:]
+			continue
+		}
+
+		if strings.HasPrefix(line, "nameserver") {
+			splitLines := strings.Fields(line)
+			if len(splitLines) != 2 {
+				continue
+			}
+			rconf.nameServers = append(rconf.nameServers, splitLines[1])
+			continue
+		}
+
+		if line != "" {
+			rconf.others = append(rconf.others, line)
+		}
+	}
+	return rconf, nil
+}
+
+// prepareOptionsWithTimeout appends timeout to existing options if it doesn't exist,
+// otherwise it adds a new option with timeout and attempts.
+func prepareOptionsWithTimeout(input []string, timeout int, attempts int) []string {
+	configs := make([]string, len(input))
+	copy(configs, input)
+
+	for i, config := range configs {
+		if strings.HasPrefix(config, "options") {
+			config = strings.ReplaceAll(config, "rotate", "")
+			config = strings.Join(strings.Fields(config), " ")
+
+			if strings.Contains(config, "timeout:") {
+				config = timeoutRegex.ReplaceAllString(config, fmt.Sprintf("timeout:%d", timeout))
+			} else {
+				config = strings.Replace(config, "options ", fmt.Sprintf("options timeout:%d ", timeout), 1)
+			}
+
+			if strings.Contains(config, "attempts:") {
+				config = attemptsRegex.ReplaceAllString(config, fmt.Sprintf("attempts:%d", attempts))
+			} else {
+				config = strings.Replace(config, "options ", fmt.Sprintf("options attempts:%d ", attempts), 1)
+			}
+
+			configs[i] = config
+			return configs
+		}
+	}
+
+	return append(configs, fmt.Sprintf("options timeout:%d attempts:%d", timeout, attempts))
+}
+
+// removeFirstNbNameserver removes the given nameserver from the given file if it is in the first position
+// and writes the file back to the original location
+func removeFirstNbNameserver(filename, nameserverIP string) error {
+	resolvConf, err := parseResolvConfFile(filename)
+	if err != nil {
+		return fmt.Errorf("parse backup resolv.conf: %w", err)
+	}
+	content, err := os.ReadFile(filename)
+	if err != nil {
+		return fmt.Errorf("read %s: %w", filename, err)
+	}
+
+	if len(resolvConf.nameServers) > 1 && resolvConf.nameServers[0] == nameserverIP {
+		newContent := strings.Replace(string(content), fmt.Sprintf("nameserver %s\n", nameserverIP), "", 1)
+
+		stat, err := os.Stat(filename)
+		if err != nil {
+			return fmt.Errorf("stat %s: %w", filename, err)
+		}
+		if err := os.WriteFile(filename, []byte(newContent), stat.Mode()); err != nil {
+			return fmt.Errorf("write %s: %w", filename, err)
+		}
+
+	}
+
+	return nil
+}

client/internal/dns/file_parser_unix_test.go

@@ -0,0 +1,304 @@
+//go:build (linux && !android) || freebsd
+
+package dns
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_parseResolvConf(t *testing.T) {
+	testCases := []struct {
+		input          string
+		expectedSearch []string
+		expectedNS     []string
+		expectedOther  []string
+	}{
+		{
+			input: `domain example.org
+search example.org
+nameserver 192.168.0.1
+`,
+			expectedSearch: []string{"example.org"},
+			expectedNS:     []string{"192.168.0.1"},
+			expectedOther:  []string{},
+		},
+		{
+			input: `# This is /run/systemd/resolve/resolv.conf managed by man:systemd-resolved(8).
+# Do not edit.
+#
+# This file might be symlinked as /etc/resolv.conf. If you're looking at
+# /etc/resolv.conf and seeing this text, you have followed the symlink.
+#
+# This is a dynamic resolv.conf file for connecting local clients directly to
+# all known uplink DNS servers. This file lists all configured search domains.
+#
+# Third party programs should typically not access this file directly, but only
+# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
+# different way, replace this symlink by a static file or a different symlink.
+#
+# See man:systemd-resolved.service(8) for details about the supported modes of
+# operation for /etc/resolv.conf.
+
+nameserver 192.168.2.1
+nameserver 100.81.99.197
+search netbird.cloud
+`,
+			expectedSearch: []string{"netbird.cloud"},
+			expectedNS:     []string{"192.168.2.1", "100.81.99.197"},
+			expectedOther:  []string{},
+		},
+		{
+			input: `# This is /run/systemd/resolve/resolv.conf managed by man:systemd-resolved(8).
+# Do not edit.
+#
+# This file might be symlinked as /etc/resolv.conf. If you're looking at
+# /etc/resolv.conf and seeing this text, you have followed the symlink.
+#
+# This is a dynamic resolv.conf file for connecting local clients directly to
+# all known uplink DNS servers. This file lists all configured search domains.
+#
+# Third party programs should typically not access this file directly, but only
+# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
+# different way, replace this symlink by a static file or a different symlink.
+#
+# See man:systemd-resolved.service(8) for details about the supported modes of
+# operation for /etc/resolv.conf.
+
+nameserver 192.168.2.1
+nameserver 100.81.99.197
+search netbird.cloud
+options debug
+`,
+			expectedSearch: []string{"netbird.cloud"},
+			expectedNS:     []string{"192.168.2.1", "100.81.99.197"},
+			expectedOther:  []string{"options debug"},
+		},
+	}
+
+	for _, testCase := range testCases {
+		testCase := testCase
+		t.Run("test", func(t *testing.T) {
+			t.Parallel()
+			tmpResolvConf := filepath.Join(t.TempDir(), "resolv.conf")
+			err := os.WriteFile(tmpResolvConf, []byte(testCase.input), 0644)
+			if err != nil {
+				t.Fatal(err)
+			}
+			cfg, err := parseResolvConfFile(tmpResolvConf)
+			if err != nil {
+				t.Fatal(err)
+			}
+			ok := compareLists(cfg.searchDomains, testCase.expectedSearch)
+			if !ok {
+				t.Errorf("invalid parse result for search domains, expected: %v, got: %v", testCase.expectedSearch, cfg.searchDomains)
+			}
+
+			ok = compareLists(cfg.nameServers, testCase.expectedNS)
+			if !ok {
+				t.Errorf("invalid parse result for ns domains, expected: %v, got: %v", testCase.expectedNS, cfg.nameServers)
+			}
+
+			ok = compareLists(cfg.others, testCase.expectedOther)
+			if !ok {
+				t.Errorf("invalid parse result for others, expected: %v, got: %v", testCase.expectedOther, cfg.others)
+			}
+		})
+	}
+
+}
+
+func compareLists(search []string, search2 []string) bool {
+	if len(search) != len(search2) {
+		return false
+	}
+	for i, v := range search {
+		if v != search2[i] {
+			return false
+		}
+	}
+	return true
+}
+
+func Test_emptyFile(t *testing.T) {
+	cfg, err := parseResolvConfFile("/tmp/nothing")
+	if err == nil {
+		t.Errorf("expected error, got nil")
+	}
+	if len(cfg.others) != 0 || len(cfg.searchDomains) != 0 || len(cfg.nameServers) != 0 {
+		t.Errorf("expected empty config, got %v", cfg)
+	}
+}
+
+func Test_symlink(t *testing.T) {
+	input := `# This is /run/systemd/resolve/resolv.conf managed by man:systemd-resolved(8).
+# Do not edit.
+#
+# This file might be symlinked as /etc/resolv.conf. If you're looking at
+# /etc/resolv.conf and seeing this text, you have followed the symlink.
+#
+# This is a dynamic resolv.conf file for connecting local clients directly to
+# all known uplink DNS servers. This file lists all configured search domains.
+#
+# Third party programs should typically not access this file directly, but only
+# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
+# different way, replace this symlink by a static file or a different symlink.
+#
+# See man:systemd-resolved.service(8) for details about the supported modes of
+# operation for /etc/resolv.conf.
+
+nameserver 192.168.0.1
+`
+
+	tmpResolvConf := filepath.Join(t.TempDir(), "resolv.conf")
+	err := os.WriteFile(tmpResolvConf, []byte(input), 0644)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	tmpLink := filepath.Join(t.TempDir(), "symlink")
+	err = os.Symlink(tmpResolvConf, tmpLink)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cfg, err := parseResolvConfFile(tmpLink)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(cfg.nameServers) != 1 {
+		t.Errorf("unexpected resolv.conf content: %v", cfg)
+	}
+}
+
+func TestPrepareOptionsWithTimeout(t *testing.T) {
+	tests := []struct {
+		name     string
+		others   []string
+		timeout  int
+		attempts int
+		expected []string
+	}{
+		{
+			name:     "Append new options with timeout and attempts",
+			others:   []string{"some config"},
+			timeout:  2,
+			attempts: 2,
+			expected: []string{"some config", "options timeout:2 attempts:2"},
+		},
+		{
+			name:     "Modify existing options to exclude rotate and include timeout and attempts",
+			others:   []string{"some config", "options rotate someother"},
+			timeout:  3,
+			attempts: 2,
+			expected: []string{"some config", "options attempts:2 timeout:3 someother"},
+		},
+		{
+			name:     "Existing options with timeout and attempts are updated",
+			others:   []string{"some config", "options timeout:4 attempts:3"},
+			timeout:  5,
+			attempts: 4,
+			expected: []string{"some config", "options timeout:5 attempts:4"},
+		},
+		{
+			name:     "Modify existing options, add missing attempts before timeout",
+			others:   []string{"some config", "options timeout:4"},
+			timeout:  4,
+			attempts: 3,
+			expected: []string{"some config", "options attempts:3 timeout:4"},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			result := prepareOptionsWithTimeout(tc.others, tc.timeout, tc.attempts)
+			assert.Equal(t, tc.expected, result)
+		})
+	}
+}
+
+func TestRemoveFirstNbNameserver(t *testing.T) {
+	testCases := []struct {
+		name       string
+		content    string
+		ipToRemove string
+		expected   string
+	}{
+		{
+			name: "Unrelated nameservers with comments and options",
+			content: `# This is a comment
+options rotate
+nameserver 1.1.1.1
+# Another comment
+nameserver 8.8.4.4
+search example.com`,
+			ipToRemove: "9.9.9.9",
+			expected: `# This is a comment
+options rotate
+nameserver 1.1.1.1
+# Another comment
+nameserver 8.8.4.4
+search example.com`,
+		},
+		{
+			name: "First nameserver matches",
+			content: `search example.com
+nameserver 9.9.9.9
+# oof, a comment
+nameserver 8.8.4.4
+options attempts:5`,
+			ipToRemove: "9.9.9.9",
+			expected: `search example.com
+# oof, a comment
+nameserver 8.8.4.4
+options attempts:5`,
+		},
+		{
+			name: "Target IP not the first nameserver",
+			// nolint:dupword
+			content: `# Comment about the first nameserver
+nameserver 8.8.4.4
+# Comment before our target
+nameserver 9.9.9.9
+options timeout:2`,
+			ipToRemove: "9.9.9.9",
+			// nolint:dupword
+			expected: `# Comment about the first nameserver
+nameserver 8.8.4.4
+# Comment before our target
+nameserver 9.9.9.9
+options timeout:2`,
+		},
+		{
+			name: "Only nameserver matches",
+			content: `options debug
+nameserver 9.9.9.9
+search localdomain`,
+			ipToRemove: "9.9.9.9",
+			expected: `options debug
+nameserver 9.9.9.9
+search localdomain`,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			tempDir := t.TempDir()
+			tempFile := filepath.Join(tempDir, "resolv.conf")
+			err := os.WriteFile(tempFile, []byte(tc.content), 0644)
+			assert.NoError(t, err)
+
+			err = removeFirstNbNameserver(tempFile, tc.ipToRemove)
+			assert.NoError(t, err)
+
+			content, err := os.ReadFile(tempFile)
+			assert.NoError(t, err)
+
+			assert.Equal(t, tc.expected, string(content), "The resulting content should match the expected output.")
+		})
+	}
+}

client/internal/dns/file_repair_unix.go

@@ -1,10 +1,10 @@
-//go:build !android
+//go:build (linux && !android) || freebsd
 
 package dns
 
 import (
-	"fmt"
 	"path"
+	"path/filepath"
 	"sync"
 
 	"github.com/fsnotify/fsnotify"
@@ -32,9 +32,10 @@ type repair struct {
 }
 
 func newRepair(operationFile string, updateFn repairConfFn) *repair {
+	targetFile := targetFile(operationFile)
 	return &repair{
-		operationFile: operationFile,
-		watchDir:      path.Dir(operationFile),
+		operationFile: targetFile,
+		watchDir:      path.Dir(targetFile),
 		updateFn:      updateFn,
 	}
 }
@@ -44,7 +45,7 @@ func (f *repair) watchFileChanges(nbSearchDomains []string, nbNameserverIP strin
 		return
 	}
 
-	log.Infof("start to watch resolv.conf")
+	log.Infof("start to watch resolv.conf: %s", f.operationFile)
 	inotify, err := fsnotify.NewWatcher()
 	if err != nil {
 		log.Errorf("failed to start inotify watcher for resolv.conf: %s", err)
@@ -60,7 +61,7 @@ func (f *repair) watchFileChanges(nbSearchDomains []string, nbNameserverIP strin
 				continue
 			}
 
-			log.Tracef("resolv.conf changed, check if it is broken")
+			log.Tracef("%s changed, check if it is broken", f.operationFile)
 
 			rConf, err := parseResolvConfFile(f.operationFile)
 			if err != nil {
@@ -87,7 +88,7 @@ func (f *repair) watchFileChanges(nbSearchDomains []string, nbNameserverIP strin
 
 			err = f.inotify.Add(f.watchDir)
 			if err != nil {
-				log.Errorf("failed to readd inotify watch for resolv.conf: %s", err)
+				log.Errorf("failed to re-add inotify watch for resolv.conf: %s", err)
 				return
 			}
 		}
@@ -124,8 +125,7 @@ func (f *repair) isEventRelevant(event fsnotify.Event) bool {
 		return false
 	}
 
-	operationFileSymlink := fmt.Sprintf("%s~", f.operationFile)
-	if event.Name == f.operationFile || event.Name == operationFileSymlink {
+	if event.Name == f.operationFile {
 		return true
 	}
 	return false
@@ -149,3 +149,11 @@ func isNbParamsMissing(nbSearchDomains []string, nbNameserverIP string, rConf *r
 
 	return false
 }
+
+func targetFile(filename string) string {
+	target, err := filepath.EvalSymlinks(filename)
+	if err != nil {
+		log.Errorf("evarl err: %s", err)
+	}
+	return target
+}

client/internal/dns/file_repair_unix_test.go

@@ -1,10 +1,11 @@
-//go:build !android
+//go:build (linux && !android) || freebsd
 
 package dns
 
 import (
 	"context"
 	"os"
+	"path/filepath"
 	"testing"
 	"time"
 
@@ -126,5 +127,49 @@ nameserver 8.8.8.8`,
 			}
 		})
 	}
-
+}
+
+func Test_newRepairSymlink(t *testing.T) {
+	resolvConfContent := `
+nameserver 10.0.0.1
+nameserver 8.8.8.8
+searchdomain netbird.cloud something`
+
+	modifyContent := `nameserver 8.8.8.8`
+
+	tmpResolvConf := filepath.Join(t.TempDir(), "resolv.conf")
+	err := os.WriteFile(tmpResolvConf, []byte(resolvConfContent), 0644)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	tmpLink := filepath.Join(t.TempDir(), "symlink")
+	err = os.Symlink(tmpResolvConf, tmpLink)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var changed bool
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	updateFn := func([]string, string, *resolvConf) error {
+		changed = true
+		cancel()
+		return nil
+	}
+
+	r := newRepair(tmpLink, updateFn)
+	r.watchFileChanges([]string{"netbird.cloud"}, "10.0.0.1")
+
+	err = os.WriteFile(tmpLink, []byte(modifyContent), 0755)
+	if err != nil {
+		t.Fatalf("failed to write out resolv.conf: %s", err)
+	}
+
+	<-ctx.Done()
+
+	r.stopWatchFileChanges()
+
+	if changed != true {
+		t.Errorf("unexpected result: want: %v, got: %v", true, false)
+	}
 }

client/internal/dns/file_unix.go

@@ -1,12 +1,14 @@
-//go:build !android
+//go:build (linux && !android) || freebsd
 
 package dns
 
 import (
 	"bytes"
 	"fmt"
+	"net/netip"
 	"os"
 	"strings"
+	"time"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -22,10 +24,16 @@ const (
 	fileMaxNumberOfSearchDomains = 6
 )
 
+const (
+	dnsFailoverTimeout  = 4 * time.Second
+	dnsFailoverAttempts = 1
+)
+
 type fileConfigurator struct {
 	repair *repair
 
-	originalPerms os.FileMode
+	originalPerms  os.FileMode
+	nbNameserverIP string
 }
 
 func newFileConfigurator() (hostManager, error) {
@@ -39,44 +47,40 @@ func (f *fileConfigurator) supportCustomPort() bool {
 }
 
 func (f *fileConfigurator) applyDNSConfig(config HostDNSConfig) error {
-	backupFileExist := false
-	_, err := os.Stat(fileDefaultResolvConfBackupLocation)
-	if err == nil {
-		backupFileExist = true
-	}
-
+	backupFileExist := f.isBackupFileExist()
 	if !config.RouteAll {
 		if backupFileExist {
-			err = f.restore()
+			f.repair.stopWatchFileChanges()
+			err := f.restore()
 			if err != nil {
-				return fmt.Errorf("unable to configure DNS for this peer using file manager without a Primary nameserver group. Restoring the original file return err: %s", err)
+				return fmt.Errorf("restoring the original resolv.conf file return err: %w", err)
 			}
 		}
 		return fmt.Errorf("unable to configure DNS for this peer using file manager without a nameserver group with all domains configured")
 	}
 
 	if !backupFileExist {
-		err = f.backup()
+		err := f.backup()
 		if err != nil {
-			return fmt.Errorf("unable to backup the resolv.conf file")
+			return fmt.Errorf("unable to backup the resolv.conf file: %w", err)
 		}
 	}
 
 	nbSearchDomains := searchDomains(config)
-	nbNameserverIP := config.ServerIP
+	f.nbNameserverIP = config.ServerIP
 
 	resolvConf, err := parseBackupResolvConf()
 	if err != nil {
-		log.Error(err)
+		log.Errorf("could not read original search domains from %s: %s", fileDefaultResolvConfBackupLocation, err)
 	}
 
 	f.repair.stopWatchFileChanges()
 
-	err = f.updateConfig(nbSearchDomains, nbNameserverIP, resolvConf)
+	err = f.updateConfig(nbSearchDomains, f.nbNameserverIP, resolvConf)
 	if err != nil {
 		return err
 	}
-	f.repair.watchFileChanges(nbSearchDomains, nbNameserverIP)
+	f.repair.watchFileChanges(nbSearchDomains, f.nbNameserverIP)
 	return nil
 }
 
@@ -84,10 +88,11 @@ func (f *fileConfigurator) updateConfig(nbSearchDomains []string, nbNameserverIP
 	searchDomainList := mergeSearchDomains(nbSearchDomains, cfg.searchDomains)
 	nameServers := generateNsList(nbNameserverIP, cfg)
 
+	options := prepareOptionsWithTimeout(cfg.others, int(dnsFailoverTimeout.Seconds()), dnsFailoverAttempts)
 	buf := prepareResolvConfContent(
 		searchDomainList,
 		nameServers,
-		cfg.others)
+		options)
 
 	log.Debugf("creating managed file %s", defaultResolvConfPath)
 	err := os.WriteFile(defaultResolvConfPath, buf.Bytes(), f.originalPerms)
@@ -96,10 +101,16 @@ func (f *fileConfigurator) updateConfig(nbSearchDomains []string, nbNameserverIP
 		if restoreErr != nil {
 			log.Errorf("attempt to restore default file failed with error: %s", err)
 		}
-		return fmt.Errorf("got an creating resolver file %s. Error: %s", defaultResolvConfPath, err)
+		return fmt.Errorf("creating resolver file %s. Error: %w", defaultResolvConfPath, err)
+	}
+
+	log.Infof("created a NetBird managed %s file with the DNS settings. Added %d search domains. Search list: %s", defaultResolvConfPath, len(searchDomainList), searchDomainList)
+
+	// create another backup for unclean shutdown detection right after overwriting the original resolv.conf
+	if err := createUncleanShutdownIndicator(fileDefaultResolvConfBackupLocation, fileManager, nbNameserverIP); err != nil {
+		log.Errorf("failed to create unclean shutdown resolv.conf backup: %s", err)
 	}
 
-	log.Infof("created a NetBird managed %s file with your DNS settings. Added %d search domains. Search list: %s", defaultResolvConfPath, len(searchDomainList), searchDomainList)
 	return nil
 }
 
@@ -111,27 +122,83 @@ func (f *fileConfigurator) restoreHostDNS() error {
 func (f *fileConfigurator) backup() error {
 	stats, err := os.Stat(defaultResolvConfPath)
 	if err != nil {
-		return fmt.Errorf("got an error while checking stats for %s file. Error: %s", defaultResolvConfPath, err)
+		return fmt.Errorf("checking stats for %s file. Error: %w", defaultResolvConfPath, err)
 	}
 
 	f.originalPerms = stats.Mode()
 
 	err = copyFile(defaultResolvConfPath, fileDefaultResolvConfBackupLocation)
 	if err != nil {
-		return fmt.Errorf("got error while backing up the %s file. Error: %s", defaultResolvConfPath, err)
+		return fmt.Errorf("backing up %s: %w", defaultResolvConfPath, err)
 	}
 	return nil
 }
 
 func (f *fileConfigurator) restore() error {
-	err := copyFile(fileDefaultResolvConfBackupLocation, defaultResolvConfPath)
+	err := removeFirstNbNameserver(fileDefaultResolvConfBackupLocation, f.nbNameserverIP)
 	if err != nil {
-		return fmt.Errorf("got error while restoring the %s file from %s. Error: %s", defaultResolvConfPath, fileDefaultResolvConfBackupLocation, err)
+		log.Errorf("Failed to remove netbird nameserver from %s on backup restore: %s", fileDefaultResolvConfBackupLocation, err)
+	}
+
+	err = copyFile(fileDefaultResolvConfBackupLocation, defaultResolvConfPath)
+	if err != nil {
+		return fmt.Errorf("restoring %s from %s: %w", defaultResolvConfPath, fileDefaultResolvConfBackupLocation, err)
+	}
+
+	if err := removeUncleanShutdownIndicator(); err != nil {
+		log.Errorf("failed to remove unclean shutdown resolv.conf backup: %s", err)
 	}
 
 	return os.RemoveAll(fileDefaultResolvConfBackupLocation)
 }
 
+func (f *fileConfigurator) restoreUncleanShutdownDNS(storedDNSAddress *netip.Addr) error {
+	resolvConf, err := parseDefaultResolvConf()
+	if err != nil {
+		return fmt.Errorf("parse current resolv.conf: %w", err)
+	}
+
+	// no current nameservers set -> restore
+	if len(resolvConf.nameServers) == 0 {
+		return restoreResolvConfFile()
+	}
+
+	currentDNSAddress, err := netip.ParseAddr(resolvConf.nameServers[0])
+	// not a valid first nameserver -> restore
+	if err != nil {
+		log.Errorf("restoring unclean shutdown: parse dns address %s failed: %s", resolvConf.nameServers[0], err)
+		return restoreResolvConfFile()
+	}
+
+	// current address is still netbird's non-available dns address -> restore
+	// comparing parsed addresses only, to remove ambiguity
+	if currentDNSAddress.String() == storedDNSAddress.String() {
+		return restoreResolvConfFile()
+	}
+
+	log.Info("restoring unclean shutdown: first current nameserver differs from saved nameserver pre-netbird: not restoring")
+	return nil
+}
+
+func (f *fileConfigurator) isBackupFileExist() bool {
+	_, err := os.Stat(fileDefaultResolvConfBackupLocation)
+	return err == nil
+}
+
+func restoreResolvConfFile() error {
+	log.Debugf("restoring unclean shutdown: restoring %s from %s", defaultResolvConfPath, fileUncleanShutdownResolvConfLocation)
+
+	if err := copyFile(fileUncleanShutdownResolvConfLocation, defaultResolvConfPath); err != nil {
+		return fmt.Errorf("restoring %s from %s: %w", defaultResolvConfPath, fileUncleanShutdownResolvConfLocation, err)
+	}
+
+	if err := removeUncleanShutdownIndicator(); err != nil {
+		log.Errorf("failed to remove unclean shutdown resolv.conf file: %s", err)
+	}
+
+	return nil
+}
+
 // generateNsList generates a list of nameservers from the config and adds the primary nameserver to the beginning of the list
 func generateNsList(nbNameserverIP string, cfg *resolvConf) []string {
 	ns := make([]string, 1, len(cfg.nameServers)+1)
@@ -231,17 +298,17 @@ func validateAndFillSearchDomains(initialLineChars int, s *[]string, vs []string
 func copyFile(src, dest string) error {
 	stats, err := os.Stat(src)
 	if err != nil {
-		return fmt.Errorf("got an error while checking stats for %s file when copying it. Error: %s", src, err)
+		return fmt.Errorf("checking stats for %s file when copying it. Error: %s", src, err)
 	}
 
 	bytesRead, err := os.ReadFile(src)
 	if err != nil {
-		return fmt.Errorf("got an error while reading the file %s file for copy. Error: %s", src, err)
+		return fmt.Errorf("reading the file %s file for copy. Error: %s", src, err)
 	}
 
 	err = os.WriteFile(dest, bytesRead, stats.Mode())
 	if err != nil {
-		return fmt.Errorf("got an writing the destination file %s for copy. Error: %s", dest, err)
+		return fmt.Errorf("writing the destination file %s for copy. Error: %s", dest, err)
 	}
 	return nil
 }

client/internal/dns/file_unix_test.go

@@ -1,4 +1,4 @@
-//go:build !android
+//go:build (linux && !android) || freebsd
 
 package dns
 

client/internal/dns/host.go

@@ -2,6 +2,7 @@ package dns
 
 import (
 	"fmt"
+	"net/netip"
 	"strings"
 
 	nbdns "github.com/netbirdio/netbird/dns"
@@ -11,6 +12,13 @@ type hostManager interface {
 	applyDNSConfig(config HostDNSConfig) error
 	restoreHostDNS() error
 	supportCustomPort() bool
+	restoreUncleanShutdownDNS(storedDNSAddress *netip.Addr) error
+}
+
+type SystemDNSSettings struct {
+	Domains    []string
+	ServerIP   string
+	ServerPort int
 }
 
 type HostDNSConfig struct {
@@ -27,9 +35,10 @@ type DomainConfig struct {
 }
 
 type mockHostConfigurator struct {
-	applyDNSConfigFunc    func(config HostDNSConfig) error
-	restoreHostDNSFunc    func() error
-	supportCustomPortFunc func() bool
+	applyDNSConfigFunc            func(config HostDNSConfig) error
+	restoreHostDNSFunc            func() error
+	supportCustomPortFunc         func() bool
+	restoreUncleanShutdownDNSFunc func(*netip.Addr) error
 }
 
 func (m *mockHostConfigurator) applyDNSConfig(config HostDNSConfig) error {
@@ -53,11 +62,19 @@ func (m *mockHostConfigurator) supportCustomPort() bool {
 	return false
 }
 
+func (m *mockHostConfigurator) restoreUncleanShutdownDNS(storedDNSAddress *netip.Addr) error {
+	if m.restoreUncleanShutdownDNSFunc != nil {
+		return m.restoreUncleanShutdownDNSFunc(storedDNSAddress)
+	}
+	return fmt.Errorf("method restoreUncleanShutdownDNS is not implemented")
+}
+
 func newNoopHostMocker() hostManager {
 	return &mockHostConfigurator{
-		applyDNSConfigFunc:    func(config HostDNSConfig) error { return nil },
-		restoreHostDNSFunc:    func() error { return nil },
-		supportCustomPortFunc: func() bool { return true },
+		applyDNSConfigFunc:            func(config HostDNSConfig) error { return nil },
+		restoreHostDNSFunc:            func() error { return nil },
+		supportCustomPortFunc:         func() bool { return true },
+		restoreUncleanShutdownDNSFunc: func(*netip.Addr) error { return nil },
 	}
 }
 

client/internal/dns/host_android.go

@@ -1,9 +1,11 @@
 package dns
 
+import "net/netip"
+
 type androidHostManager struct {
 }
 
-func newHostManager(wgInterface WGIface) (hostManager, error) {
+func newHostManager() (hostManager, error) {
 	return &androidHostManager{}, nil
 }
 
@@ -18,3 +20,7 @@ func (a androidHostManager) restoreHostDNS() error {
 func (a androidHostManager) supportCustomPort() bool {
 	return false
 }
+
+func (a androidHostManager) restoreUncleanShutdownDNS(*netip.Addr) error {
+	return nil
+}

client/internal/dns/host_darwin.go

@@ -6,6 +6,9 @@ import (
 	"bufio"
 	"bytes"
 	"fmt"
+	"io"
+	"net"
+	"net/netip"
 	"os/exec"
 	"strconv"
 	"strings"
@@ -16,7 +19,7 @@ import (
 const (
 	netbirdDNSStateKeyFormat            = "State:/Network/Service/NetBird-%s/DNS"
 	globalIPv4State                     = "State:/Network/Global/IPv4"
-	primaryServiceSetupKeyFormat        = "Setup:/Network/Service/%s/DNS"
+	primaryServiceStateKeyFormat        = "State:/Network/Service/%s/DNS"
 	keySupplementalMatchDomains         = "SupplementalMatchDomains"
 	keySupplementalMatchDomainsNoSearch = "SupplementalMatchDomainsNoSearch"
 	keyServerAddresses                  = "ServerAddresses"
@@ -26,15 +29,15 @@ const (
 	scutilPath                          = "/usr/sbin/scutil"
 	searchSuffix                        = "Search"
 	matchSuffix                         = "Match"
+	localSuffix                         = "Local"
 )
 
 type systemConfigurator struct {
-	// primaryServiceID primary interface in the system. AKA the interface with the default route
-	primaryServiceID string
-	createdKeys      map[string]struct{}
+	createdKeys       map[string]struct{}
+	systemDNSSettings SystemDNSSettings
 }
 
-func newHostManager(_ WGIface) (hostManager, error) {
+func newHostManager() (hostManager, error) {
 	return &systemConfigurator{
 		createdKeys: make(map[string]struct{}),
 	}, nil
@@ -47,18 +50,9 @@ func (s *systemConfigurator) supportCustomPort() bool {
 func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	var err error
 
-	if config.RouteAll {
-		err = s.addDNSSetupForAll(config.ServerIP, config.ServerPort)
-		if err != nil {
-			return err
-		}
-	} else if s.primaryServiceID != "" {
-		err = s.removeKeyFromSystemConfig(getKeyWithInput(primaryServiceSetupKeyFormat, s.primaryServiceID))
-		if err != nil {
-			return err
-		}
-		s.primaryServiceID = ""
-		log.Infof("removed %s:%d as main DNS resolver for this peer", config.ServerIP, config.ServerPort)
+	// create a file for unclean shutdown detection
+	if err := createUncleanShutdownIndicator(); err != nil {
+		log.Errorf("failed to create unclean shutdown file: %s", err)
 	}
 
 	var (
@@ -66,6 +60,19 @@ func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		matchDomains  []string
 	)
 
+	err = s.recordSystemDNSSettings(true)
+	if err != nil {
+		log.Errorf("unable to update record of System's DNS config: %s", err.Error())
+	}
+
+	if config.RouteAll {
+		searchDomains = append(searchDomains, "\"\"")
+		err = s.addLocalDNS()
+		if err != nil {
+			log.Infof("failed to enable split DNS")
+		}
+	}
+
 	for _, dConf := range config.Domains {
 		if dConf.Disabled {
 			continue
@@ -85,7 +92,7 @@ func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		err = s.removeKeyFromSystemConfig(matchKey)
 	}
 	if err != nil {
-		return err
+		return fmt.Errorf("add match domains: %w", err)
 	}
 
 	searchKey := getKeyWithInput(netbirdDNSStateKeyFormat, searchSuffix)
@@ -96,40 +103,51 @@ func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		err = s.removeKeyFromSystemConfig(searchKey)
 	}
 	if err != nil {
-		return err
+		return fmt.Errorf("add search domains: %w", err)
 	}
 
 	return nil
 }
 
 func (s *systemConfigurator) restoreHostDNS() error {
-	lines := ""
-	for key := range s.createdKeys {
-		lines += buildRemoveKeyOperation(key)
+	keys := s.getRemovableKeysWithDefaults()
+	for _, key := range keys {
 		keyType := "search"
 		if strings.Contains(key, matchSuffix) {
 			keyType = "match"
 		}
 		log.Infof("removing %s domains from system", keyType)
+		err := s.removeKeyFromSystemConfig(key)
+		if err != nil {
+			log.Errorf("failed to remove %s domains from system: %s", keyType, err)
+		}
 	}
-	if s.primaryServiceID != "" {
-		lines += buildRemoveKeyOperation(getKeyWithInput(primaryServiceSetupKeyFormat, s.primaryServiceID))
-		log.Infof("restoring DNS resolver configuration for system")
-	}
-	_, err := runSystemConfigCommand(wrapCommand(lines))
-	if err != nil {
-		log.Errorf("got an error while cleaning the system configuration: %s", err)
-		return err
+
+	if err := removeUncleanShutdownIndicator(); err != nil {
+		log.Errorf("failed to remove unclean shutdown file: %s", err)
 	}
 
 	return nil
 }
 
+func (s *systemConfigurator) getRemovableKeysWithDefaults() []string {
+	if len(s.createdKeys) == 0 {
+		// return defaults for startup calls
+		return []string{getKeyWithInput(netbirdDNSStateKeyFormat, searchSuffix), getKeyWithInput(netbirdDNSStateKeyFormat, matchSuffix)}
+	}
+
+	keys := make([]string, 0, len(s.createdKeys))
+	for key := range s.createdKeys {
+		keys = append(keys, key)
+	}
+	return keys
+}
+
 func (s *systemConfigurator) removeKeyFromSystemConfig(key string) error {
 	line := buildRemoveKeyOperation(key)
 	_, err := runSystemConfigCommand(wrapCommand(line))
 	if err != nil {
-		return err
+		return fmt.Errorf("remove key: %w", err)
 	}
 
 	delete(s.createdKeys, key)
@@ -137,10 +155,101 @@ func (s *systemConfigurator) removeKeyFromSystemConfig(key string) error {
 	return nil
 }
 
+func (s *systemConfigurator) addLocalDNS() error {
+	if s.systemDNSSettings.ServerIP == "" || len(s.systemDNSSettings.Domains) == 0 {
+		err := s.recordSystemDNSSettings(true)
+		log.Errorf("Unable to get system DNS configuration")
+		return err
+	}
+	localKey := getKeyWithInput(netbirdDNSStateKeyFormat, localSuffix)
+	if s.systemDNSSettings.ServerIP != "" && len(s.systemDNSSettings.Domains) != 0 {
+		err := s.addSearchDomains(localKey, strings.Join(s.systemDNSSettings.Domains, " "), s.systemDNSSettings.ServerIP, s.systemDNSSettings.ServerPort)
+		if err != nil {
+			return fmt.Errorf("couldn't add local network DNS conf: %w", err)
+		}
+	} else {
+		log.Info("Not enabling local DNS server")
+	}
+
+	return nil
+}
+
+func (s *systemConfigurator) recordSystemDNSSettings(force bool) error {
+	if s.systemDNSSettings.ServerIP != "" && len(s.systemDNSSettings.Domains) != 0 && !force {
+		return nil
+	}
+
+	systemDNSSettings, err := s.getSystemDNSSettings()
+	if err != nil {
+		return fmt.Errorf("couldn't get current DNS config: %w", err)
+	}
+	s.systemDNSSettings = systemDNSSettings
+
+	return nil
+}
+
+func (s *systemConfigurator) getSystemDNSSettings() (SystemDNSSettings, error) {
+	primaryServiceKey, _, err := s.getPrimaryService()
+	if err != nil || primaryServiceKey == "" {
+		return SystemDNSSettings{}, fmt.Errorf("couldn't find the primary service key: %w", err)
+	}
+	dnsServiceKey := getKeyWithInput(primaryServiceStateKeyFormat, primaryServiceKey)
+	line := buildCommandLine("show", dnsServiceKey, "")
+	stdinCommands := wrapCommand(line)
+
+	b, err := runSystemConfigCommand(stdinCommands)
+	if err != nil {
+		return SystemDNSSettings{}, fmt.Errorf("sending the command: %w", err)
+	}
+
+	var dnsSettings SystemDNSSettings
+	inSearchDomainsArray := false
+	inServerAddressesArray := false
+
+	scanner := bufio.NewScanner(bytes.NewReader(b))
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		switch {
+		case strings.HasPrefix(line, "DomainName :"):
+			domainName := strings.TrimSpace(strings.Split(line, ":")[1])
+			dnsSettings.Domains = append(dnsSettings.Domains, domainName)
+		case line == "SearchDomains : <array> {":
+			inSearchDomainsArray = true
+			continue
+		case line == "ServerAddresses : <array> {":
+			inServerAddressesArray = true
+			continue
+		case line == "}":
+			inSearchDomainsArray = false
+			inServerAddressesArray = false
+		}
+
+		if inSearchDomainsArray {
+			searchDomain := strings.Split(line, " : ")[1]
+			dnsSettings.Domains = append(dnsSettings.Domains, searchDomain)
+		} else if inServerAddressesArray {
+			address := strings.Split(line, " : ")[1]
+			if ip := net.ParseIP(address); ip != nil && ip.To4() != nil {
+				dnsSettings.ServerIP = address
+				inServerAddressesArray = false // Stop reading after finding the first IPv4 address
+			}
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return dnsSettings, err
+	}
+
+	// default to 53 port
+	dnsSettings.ServerPort = 53
+
+	return dnsSettings, nil
+}
+
 func (s *systemConfigurator) addSearchDomains(key, domains string, ip string, port int) error {
 	err := s.addDNSState(key, domains, ip, port, true)
 	if err != nil {
-		return err
+		return fmt.Errorf("add dns state: %w", err)
 	}
 
 	log.Infof("added %d search domains to the state. Domain list: %s", len(strings.Split(domains, " ")), domains)
@@ -153,7 +262,7 @@ func (s *systemConfigurator) addSearchDomains(key, domains string, ip string, po
 func (s *systemConfigurator) addMatchDomains(key, domains, dnsServer string, port int) error {
 	err := s.addDNSState(key, domains, dnsServer, port, false)
 	if err != nil {
-		return err
+		return fmt.Errorf("add dns state: %w", err)
 	}
 
 	log.Infof("added %d match domains to the state. Domain list: %s", len(strings.Split(domains, " ")), domains)
@@ -178,33 +287,20 @@ func (s *systemConfigurator) addDNSState(state, domains, dnsServer string, port
 
 	_, err := runSystemConfigCommand(stdinCommands)
 	if err != nil {
-		return fmt.Errorf("got error while applying state for domains %s, error: %s", domains, err)
+		return fmt.Errorf("applying state for domains %s, error: %w", domains, err)
 	}
 	return nil
 }
 
-func (s *systemConfigurator) addDNSSetupForAll(dnsServer string, port int) error {
-	primaryServiceKey, existingNameserver := s.getPrimaryService()
-	if primaryServiceKey == "" {
-		return fmt.Errorf("couldn't find the primary service key")
-	}
-	err := s.addDNSSetup(getKeyWithInput(primaryServiceSetupKeyFormat, primaryServiceKey), dnsServer, port, existingNameserver)
-	if err != nil {
-		return err
-	}
-	log.Infof("configured %s:%d as main DNS resolver for this peer", dnsServer, port)
-	s.primaryServiceID = primaryServiceKey
-	return nil
-}
-
-func (s *systemConfigurator) getPrimaryService() (string, string) {
+func (s *systemConfigurator) getPrimaryService() (string, string, error) {
 	line := buildCommandLine("show", globalIPv4State, "")
 	stdinCommands := wrapCommand(line)
+
 	b, err := runSystemConfigCommand(stdinCommands)
 	if err != nil {
-		log.Error("got error while sending the command: ", err)
-		return "", ""
+		return "", "", fmt.Errorf("sending the command: %w", err)
 	}
+
 	scanner := bufio.NewScanner(bytes.NewReader(b))
 	primaryService := ""
 	router := ""
@@ -217,18 +313,16 @@ func (s *systemConfigurator) getPrimaryService() (string, string) {
 			router = strings.TrimSpace(strings.Split(text, ":")[1])
 		}
 	}
-	return primaryService, router
+	if err := scanner.Err(); err != nil && err != io.EOF {
+		return primaryService, router, fmt.Errorf("scan: %w", err)
+	}
+
+	return primaryService, router, nil
 }
 
-func (s *systemConfigurator) addDNSSetup(setupKey, dnsServer string, port int, existingDNSServer string) error {
-	lines := buildAddCommandLine(keySupplementalMatchDomainsNoSearch, digitSymbol+strconv.Itoa(0))
-	lines += buildAddCommandLine(keyServerAddresses, arraySymbol+dnsServer+" "+existingDNSServer)
-	lines += buildAddCommandLine(keyServerPort, digitSymbol+strconv.Itoa(port))
-	addDomainCommand := buildCreateStateWithOperation(setupKey, lines)
-	stdinCommands := wrapCommand(addDomainCommand)
-	_, err := runSystemConfigCommand(stdinCommands)
-	if err != nil {
-		return fmt.Errorf("got error while applying dns setup, error: %s", err)
+func (s *systemConfigurator) restoreUncleanShutdownDNS(*netip.Addr) error {
+	if err := s.restoreHostDNS(); err != nil {
+		return fmt.Errorf("restoring dns via scutil: %w", err)
 	}
 	return nil
 }
@@ -266,7 +360,7 @@ func runSystemConfigCommand(command string) ([]byte, error) {
 	cmd.Stdin = strings.NewReader(command)
 	out, err := cmd.Output()
 	if err != nil {
-		return nil, fmt.Errorf("got error while running system configuration command: \"%s\", error: %s", command, err)
+		return nil, fmt.Errorf("running system configuration command: \"%s\", error: %w", command, err)
 	}
 	return out, nil
 }

client/internal/dns/host_ios.go

@@ -2,6 +2,8 @@ package dns
 
 import (
 	"encoding/json"
+	"fmt"
+	"net/netip"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -20,7 +22,7 @@ func newHostManager(dnsManager IosDnsManager) (hostManager, error) {
 func (a iosHostManager) applyDNSConfig(config HostDNSConfig) error {
 	jsonData, err := json.Marshal(config)
 	if err != nil {
-		return err
+		return fmt.Errorf("marshal: %w", err)
 	}
 	jsonString := string(jsonData)
 	log.Debugf("Applying DNS settings: %s", jsonString)
@@ -35,3 +37,7 @@ func (a iosHostManager) restoreHostDNS() error {
 func (a iosHostManager) supportCustomPort() bool {
 	return false
 }
+
+func (a iosHostManager) restoreUncleanShutdownDNS(*netip.Addr) error {
+	return nil
+}

client/internal/dns/host_unix.go

@@ -1,10 +1,12 @@
-//go:build !android
+//go:build (linux && !android) || freebsd
 
 package dns
 
 import (
 	"bufio"
+	"errors"
 	"fmt"
+	"io"
 	"os"
 	"strings"
 
@@ -19,8 +21,27 @@ const (
 	resolvConfManager
 )
 
+var ErrUnknownOsManagerType = errors.New("unknown os manager type")
+
 type osManagerType int
 
+func newOsManagerType(osManager string) (osManagerType, error) {
+	switch osManager {
+	case "netbird":
+		return fileManager, nil
+	case "file":
+		return netbirdManager, nil
+	case "networkManager":
+		return networkManager, nil
+	case "systemd":
+		return systemdManager, nil
+	case "resolvconf":
+		return resolvConfManager, nil
+	default:
+		return 0, ErrUnknownOsManagerType
+	}
+}
+
 func (t osManagerType) String() string {
 	switch t {
 	case netbirdManager:
@@ -38,13 +59,17 @@ func (t osManagerType) String() string {
 	}
 }
 
-func newHostManager(wgInterface WGIface) (hostManager, error) {
+func newHostManager(wgInterface string) (hostManager, error) {
 	osManager, err := getOSDNSManagerType()
 	if err != nil {
 		return nil, err
 	}
 
-	log.Debugf("discovered mode is: %s", osManager)
+	log.Infof("System DNS manager discovered: %s", osManager)
+	return newHostManagerFromType(wgInterface, osManager)
+}
+
+func newHostManagerFromType(wgInterface string, osManager osManagerType) (hostManager, error) {
 	switch osManager {
 	case networkManager:
 		return newNetworkManagerDbusConfigurator(wgInterface)
@@ -58,12 +83,15 @@ func newHostManager(wgInterface WGIface) (hostManager, error) {
 }
 
 func getOSDNSManagerType() (osManagerType, error) {
-
 	file, err := os.Open(defaultResolvConfPath)
 	if err != nil {
-		return 0, fmt.Errorf("unable to open %s for checking owner, got error: %s", defaultResolvConfPath, err)
+		return 0, fmt.Errorf("unable to open %s for checking owner, got error: %w", defaultResolvConfPath, err)
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			log.Errorf("close file %s: %s", defaultResolvConfPath, err)
+		}
+	}()
 
 	scanner := bufio.NewScanner(file)
 	for scanner.Scan() {
@@ -80,7 +108,7 @@ func getOSDNSManagerType() (osManagerType, error) {
 		if strings.Contains(text, "NetworkManager") && isDbusListenerRunning(networkManagerDest, networkManagerDbusObjectNode) && isNetworkManagerSupported() {
 			return networkManager, nil
 		}
-		if strings.Contains(text, "systemd-resolved") && isDbusListenerRunning(systemdResolvedDest, systemdDbusObjectNode) {
+		if strings.Contains(text, "systemd-resolved") && isSystemdResolvedRunning() {
 			if checkStub() {
 				return systemdManager, nil
 			} else {
@@ -88,19 +116,17 @@ func getOSDNSManagerType() (osManagerType, error) {
 			}
 		}
 		if strings.Contains(text, "resolvconf") {
-			if isDbusListenerRunning(systemdResolvedDest, systemdDbusObjectNode) {
-				var value string
-				err = getSystemdDbusProperty(systemdDbusResolvConfModeProperty, &value)
-				if err == nil {
-					if value == systemdDbusResolvConfModeForeign {
-						return systemdManager, nil
-					}
-				}
-				log.Errorf("got an error while checking systemd resolv conf mode, error: %s", err)
+			if isSystemdResolveConfMode() {
+				return systemdManager, nil
 			}
+
 			return resolvConfManager, nil
 		}
 	}
+	if err := scanner.Err(); err != nil && err != io.EOF {
+		return 0, fmt.Errorf("scan: %w", err)
+	}
+
 	return fileManager, nil
 }
 

client/internal/dns/host_windows.go

@@ -2,6 +2,8 @@ package dns
 
 import (
 	"fmt"
+	"io"
+	"net/netip"
 	"strings"
 
 	log "github.com/sirupsen/logrus"
@@ -9,7 +11,7 @@ import (
 )
 
 const (
-	dnsPolicyConfigMatchPath            = "SYSTEM\\CurrentControlSet\\Services\\Dnscache\\Parameters\\DnsPolicyConfig\\NetBird-Match"
+	dnsPolicyConfigMatchPath            = `SYSTEM\CurrentControlSet\Services\Dnscache\Parameters\DnsPolicyConfig\NetBird-Match`
 	dnsPolicyConfigVersionKey           = "Version"
 	dnsPolicyConfigVersionValue         = 2
 	dnsPolicyConfigNameKey              = "Name"
@@ -19,7 +21,7 @@ const (
 )
 
 const (
-	interfaceConfigPath          = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces"
+	interfaceConfigPath          = `SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces`
 	interfaceConfigNameServerKey = "NameServer"
 	interfaceConfigSearchListKey = "SearchList"
 )
@@ -34,12 +36,16 @@ func newHostManager(wgInterface WGIface) (hostManager, error) {
 	if err != nil {
 		return nil, err
 	}
+	return newHostManagerWithGuid(guid)
+}
+
+func newHostManagerWithGuid(guid string) (hostManager, error) {
 	return &registryConfigurator{
 		guid: guid,
 	}, nil
 }
 
-func (s *registryConfigurator) supportCustomPort() bool {
+func (r *registryConfigurator) supportCustomPort() bool {
 	return false
 }
 
@@ -48,17 +54,22 @@ func (r *registryConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	if config.RouteAll {
 		err = r.addDNSSetupForAll(config.ServerIP)
 		if err != nil {
-			return err
+			return fmt.Errorf("add dns setup: %w", err)
 		}
 	} else if r.routingAll {
 		err = r.deleteInterfaceRegistryKeyProperty(interfaceConfigNameServerKey)
 		if err != nil {
-			return err
+			return fmt.Errorf("delete interface registry key property: %w", err)
 		}
 		r.routingAll = false
 		log.Infof("removed %s as main DNS forwarder for this peer", config.ServerIP)
 	}
 
+	// create a file for unclean shutdown detection
+	if err := createUncleanShutdownIndicator(r.guid); err != nil {
+		log.Errorf("failed to create unclean shutdown file: %s", err)
+	}
+
 	var (
 		searchDomains []string
 		matchDomains  []string
@@ -80,12 +91,12 @@ func (r *registryConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		err = removeRegistryKeyFromDNSPolicyConfig(dnsPolicyConfigMatchPath)
 	}
 	if err != nil {
-		return err
+		return fmt.Errorf("add dns match policy: %w", err)
 	}
 
 	err = r.updateSearchDomains(searchDomains)
 	if err != nil {
-		return err
+		return fmt.Errorf("update search domains: %w", err)
 	}
 
 	return nil
@@ -94,7 +105,7 @@ func (r *registryConfigurator) applyDNSConfig(config HostDNSConfig) error {
 func (r *registryConfigurator) addDNSSetupForAll(ip string) error {
 	err := r.setInterfaceRegistryKeyStringValue(interfaceConfigNameServerKey, ip)
 	if err != nil {
-		return fmt.Errorf("adding dns setup for all failed with error: %s", err)
+		return fmt.Errorf("adding dns setup for all failed with error: %w", err)
 	}
 	r.routingAll = true
 	log.Infof("configured %s:53 as main DNS forwarder for this peer", ip)
@@ -106,33 +117,33 @@ func (r *registryConfigurator) addDNSMatchPolicy(domains []string, ip string) er
 	if err == nil {
 		err = registry.DeleteKey(registry.LOCAL_MACHINE, dnsPolicyConfigMatchPath)
 		if err != nil {
-			return fmt.Errorf("unable to remove existing key from registry, key: HKEY_LOCAL_MACHINE\\%s, error: %s", dnsPolicyConfigMatchPath, err)
+			return fmt.Errorf("unable to remove existing key from registry, key: HKEY_LOCAL_MACHINE\\%s, error: %w", dnsPolicyConfigMatchPath, err)
 		}
 	}
 
 	regKey, _, err := registry.CreateKey(registry.LOCAL_MACHINE, dnsPolicyConfigMatchPath, registry.SET_VALUE)
 	if err != nil {
-		return fmt.Errorf("unable to create registry key, key: HKEY_LOCAL_MACHINE\\%s, error: %s", dnsPolicyConfigMatchPath, err)
+		return fmt.Errorf("unable to create registry key, key: HKEY_LOCAL_MACHINE\\%s, error: %w", dnsPolicyConfigMatchPath, err)
 	}
 
 	err = regKey.SetDWordValue(dnsPolicyConfigVersionKey, dnsPolicyConfigVersionValue)
 	if err != nil {
-		return fmt.Errorf("unable to set registry value for %s, error: %s", dnsPolicyConfigVersionKey, err)
+		return fmt.Errorf("unable to set registry value for %s, error: %w", dnsPolicyConfigVersionKey, err)
 	}
 
 	err = regKey.SetStringsValue(dnsPolicyConfigNameKey, domains)
 	if err != nil {
-		return fmt.Errorf("unable to set registry value for %s, error: %s", dnsPolicyConfigNameKey, err)
+		return fmt.Errorf("unable to set registry value for %s, error: %w", dnsPolicyConfigNameKey, err)
 	}
 
 	err = regKey.SetStringValue(dnsPolicyConfigGenericDNSServersKey, ip)
 	if err != nil {
-		return fmt.Errorf("unable to set registry value for %s, error: %s", dnsPolicyConfigGenericDNSServersKey, err)
+		return fmt.Errorf("unable to set registry value for %s, error: %w", dnsPolicyConfigGenericDNSServersKey, err)
 	}
 
 	err = regKey.SetDWordValue(dnsPolicyConfigConfigOptionsKey, dnsPolicyConfigConfigOptionsValue)
 	if err != nil {
-		return fmt.Errorf("unable to set registry value for %s, error: %s", dnsPolicyConfigConfigOptionsKey, err)
+		return fmt.Errorf("unable to set registry value for %s, error: %w", dnsPolicyConfigConfigOptionsKey, err)
 	}
 
 	log.Infof("added %d match domains to the state. Domain list: %s", len(domains), domains)
@@ -141,18 +152,25 @@ func (r *registryConfigurator) addDNSMatchPolicy(domains []string, ip string) er
 }
 
 func (r *registryConfigurator) restoreHostDNS() error {
-	err := removeRegistryKeyFromDNSPolicyConfig(dnsPolicyConfigMatchPath)
-	if err != nil {
-		log.Error(err)
+	if err := removeRegistryKeyFromDNSPolicyConfig(dnsPolicyConfigMatchPath); err != nil {
+		log.Errorf("remove registry key from dns policy config: %s", err)
 	}
 
-	return r.deleteInterfaceRegistryKeyProperty(interfaceConfigSearchListKey)
+	if err := r.deleteInterfaceRegistryKeyProperty(interfaceConfigSearchListKey); err != nil {
+		return fmt.Errorf("remove interface registry key: %w", err)
+	}
+
+	if err := removeUncleanShutdownIndicator(); err != nil {
+		log.Errorf("failed to remove unclean shutdown file: %s", err)
+	}
+
+	return nil
 }
 
 func (r *registryConfigurator) updateSearchDomains(domains []string) error {
 	err := r.setInterfaceRegistryKeyStringValue(interfaceConfigSearchListKey, strings.Join(domains, ","))
 	if err != nil {
-		return fmt.Errorf("adding search domain failed with error: %s", err)
+		return fmt.Errorf("adding search domain failed with error: %w", err)
 	}
 
 	log.Infof("updated the search domains in the registry with %d domains. Domain list: %s", len(domains), domains)
@@ -163,13 +181,13 @@ func (r *registryConfigurator) updateSearchDomains(domains []string) error {
 func (r *registryConfigurator) setInterfaceRegistryKeyStringValue(key, value string) error {
 	regKey, err := r.getInterfaceRegistryKey()
 	if err != nil {
-		return err
+		return fmt.Errorf("get interface registry key: %w", err)
 	}
-	defer regKey.Close()
+	defer closer(regKey)
 
 	err = regKey.SetStringValue(key, value)
 	if err != nil {
-		return fmt.Errorf("applying key %s with value \"%s\" for interface failed with error: %s", key, value, err)
+		return fmt.Errorf("applying key %s with value \"%s\" for interface failed with error: %w", key, value, err)
 	}
 
 	return nil
@@ -178,13 +196,13 @@ func (r *registryConfigurator) setInterfaceRegistryKeyStringValue(key, value str
 func (r *registryConfigurator) deleteInterfaceRegistryKeyProperty(propertyKey string) error {
 	regKey, err := r.getInterfaceRegistryKey()
 	if err != nil {
-		return err
+		return fmt.Errorf("get interface registry key: %w", err)
 	}
-	defer regKey.Close()
+	defer closer(regKey)
 
 	err = regKey.DeleteValue(propertyKey)
 	if err != nil {
-		return fmt.Errorf("deleting registry key %s for interface failed with error: %s", propertyKey, err)
+		return fmt.Errorf("deleting registry key %s for interface failed with error: %w", propertyKey, err)
 	}
 
 	return nil
@@ -197,20 +215,33 @@ func (r *registryConfigurator) getInterfaceRegistryKey() (registry.Key, error) {
 
 	regKey, err := registry.OpenKey(registry.LOCAL_MACHINE, regKeyPath, registry.SET_VALUE)
 	if err != nil {
-		return regKey, fmt.Errorf("unable to open the interface registry key, key: HKEY_LOCAL_MACHINE\\%s, error: %s", regKeyPath, err)
+		return regKey, fmt.Errorf("unable to open the interface registry key, key: HKEY_LOCAL_MACHINE\\%s, error: %w", regKeyPath, err)
 	}
 
 	return regKey, nil
 }
 
+func (r *registryConfigurator) restoreUncleanShutdownDNS(*netip.Addr) error {
+	if err := r.restoreHostDNS(); err != nil {
+		return fmt.Errorf("restoring dns via registry: %w", err)
+	}
+	return nil
+}
+
 func removeRegistryKeyFromDNSPolicyConfig(regKeyPath string) error {
 	k, err := registry.OpenKey(registry.LOCAL_MACHINE, regKeyPath, registry.QUERY_VALUE)
 	if err == nil {
-		k.Close()
+		defer closer(k)
 		err = registry.DeleteKey(registry.LOCAL_MACHINE, regKeyPath)
 		if err != nil {
-			return fmt.Errorf("unable to remove existing key from registry, key: HKEY_LOCAL_MACHINE\\%s, error: %s", regKeyPath, err)
+			return fmt.Errorf("unable to remove existing key from registry, key: HKEY_LOCAL_MACHINE\\%s, error: %w", regKeyPath, err)
 		}
 	}
 	return nil
 }
+
+func closer(closer io.Closer) {
+	if err := closer.Close(); err != nil {
+		log.Errorf("failed to close: %s", err)
+	}
+}

client/internal/dns/hosts_dns_holder.go

@@ -0,0 +1,63 @@
+package dns
+
+import (
+	"fmt"
+	"net/netip"
+	"sync"
+
+	log "github.com/sirupsen/logrus"
+)
+
+type hostsDNSHolder struct {
+	unprotectedDNSList map[string]struct{}
+	mutex              sync.RWMutex
+}
+
+func newHostsDNSHolder() *hostsDNSHolder {
+	return &hostsDNSHolder{
+		unprotectedDNSList: make(map[string]struct{}),
+	}
+}
+
+func (h *hostsDNSHolder) set(list []string) {
+	h.mutex.Lock()
+	h.unprotectedDNSList = make(map[string]struct{})
+	for _, dns := range list {
+		dnsAddr, err := h.normalizeAddress(dns)
+		if err != nil {
+			continue
+		}
+		h.unprotectedDNSList[dnsAddr] = struct{}{}
+	}
+	h.mutex.Unlock()
+}
+
+func (h *hostsDNSHolder) get() map[string]struct{} {
+	h.mutex.RLock()
+	l := h.unprotectedDNSList
+	h.mutex.RUnlock()
+	return l
+}
+
+//nolint:unused
+func (h *hostsDNSHolder) isContain(upstream string) bool {
+	h.mutex.RLock()
+	defer h.mutex.RUnlock()
+
+	_, ok := h.unprotectedDNSList[upstream]
+	return ok
+}
+
+func (h *hostsDNSHolder) normalizeAddress(addr string) (string, error) {
+	a, err := netip.ParseAddr(addr)
+	if err != nil {
+		log.Errorf("invalid upstream IP address: %s, error: %s", addr, err)
+		return "", err
+	}
+
+	if a.Is4() {
+		return fmt.Sprintf("%s:53", addr), nil
+	} else {
+		return fmt.Sprintf("[%s]:53", addr), nil
+	}
+}

client/internal/dns/local.go

@@ -31,6 +31,8 @@ func (d *localResolver) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 	response := d.lookupRecord(r)
 	if response != nil {
 		replyMessage.Answer = append(replyMessage.Answer, response)
+	} else {
+		replyMessage.Rcode = dns.RcodeNameError
 	}
 
 	err := w.WriteMsg(replyMessage)
@@ -52,7 +54,7 @@ func (d *localResolver) lookupRecord(r *dns.Msg) dns.RR {
 func (d *localResolver) registerRecord(record nbdns.SimpleRecord) error {
 	fullRecord, err := dns.NewRR(record.String())
 	if err != nil {
-		return err
+		return fmt.Errorf("register record: %w", err)
 	}
 
 	fullRecord.Header().Rdlength = record.Len()

client/internal/dns/network_manager_unix.go

@@ -1,12 +1,14 @@
-//go:build !android
+//go:build (linux && !android) || freebsd
 
 package dns
 
 import (
 	"context"
 	"encoding/binary"
+	"errors"
 	"fmt"
 	"net/netip"
+	"strings"
 	"time"
 
 	"github.com/godbus/dbus/v5"
@@ -41,9 +43,13 @@ const (
 	networkManagerDbusPrimaryDNSPriority       int32 = -500
 	networkManagerDbusWithMatchDomainPriority  int32 = 0
 	networkManagerDbusSearchDomainOnlyPriority int32 = 50
-	supportedNetworkManagerVersionConstraint         = ">= 1.16, < 1.28"
 )
 
+var supportedNetworkManagerVersionConstraints = []string{
+	">= 1.16, < 1.27",
+	">= 1.44, < 1.45",
+}
+
 type networkManagerDbusConfigurator struct {
 	dbusLinkObject dbus.ObjectPath
 	routingAll     bool
@@ -71,19 +77,19 @@ func (s networkManagerConnSettings) cleanDeprecatedSettings() {
 	}
 }
 
-func newNetworkManagerDbusConfigurator(wgInterface WGIface) (hostManager, error) {
+func newNetworkManagerDbusConfigurator(wgInterface string) (hostManager, error) {
 	obj, closeConn, err := getDbusObject(networkManagerDest, networkManagerDbusObjectNode)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("get nm dbus: %w", err)
 	}
 	defer closeConn()
 	var s string
-	err = obj.Call(networkManagerDbusGetDeviceByIPIfaceMethod, dbusDefaultFlag, wgInterface.Name()).Store(&s)
+	err = obj.Call(networkManagerDbusGetDeviceByIPIfaceMethod, dbusDefaultFlag, wgInterface).Store(&s)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("call: %w", err)
 	}
 
-	log.Debugf("got network manager dbus Link Object: %s from net interface %s", s, wgInterface.Name())
+	log.Debugf("got network manager dbus Link Object: %s from net interface %s", s, wgInterface)
 
 	return &networkManagerDbusConfigurator{
 		dbusLinkObject: dbus.ObjectPath(s),
@@ -97,14 +103,14 @@ func (n *networkManagerDbusConfigurator) supportCustomPort() bool {
 func (n *networkManagerDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	connSettings, configVersion, err := n.getAppliedConnectionSettings()
 	if err != nil {
-		return fmt.Errorf("got an error while retrieving the applied connection settings, error: %s", err)
+		return fmt.Errorf("retrieving the applied connection settings, error: %w", err)
 	}
 
 	connSettings.cleanDeprecatedSettings()
 
 	dnsIP, err := netip.ParseAddr(config.ServerIP)
 	if err != nil {
-		return fmt.Errorf("unable to parse ip address, error: %s", err)
+		return fmt.Errorf("unable to parse ip address, error: %w", err)
 	}
 	convDNSIP := binary.LittleEndian.Uint32(dnsIP.AsSlice())
 	connSettings[networkManagerDbusIPv4Key][networkManagerDbusDNSKey] = dbus.MakeVariant([]uint32{convDNSIP})
@@ -145,23 +151,37 @@ func (n *networkManagerDbusConfigurator) applyDNSConfig(config HostDNSConfig) er
 	connSettings[networkManagerDbusIPv4Key][networkManagerDbusDNSPriorityKey] = dbus.MakeVariant(priority)
 	connSettings[networkManagerDbusIPv4Key][networkManagerDbusDNSSearchKey] = dbus.MakeVariant(newDomainList)
 
+	// create a backup for unclean shutdown detection before adding domains, as these might end up in the resolv.conf file.
+	// The file content itself is not important for network-manager restoration
+	if err := createUncleanShutdownIndicator(defaultResolvConfPath, networkManager, dnsIP.String()); err != nil {
+		log.Errorf("failed to create unclean shutdown resolv.conf backup: %s", err)
+	}
+
 	log.Infof("adding %d search domains and %d match domains. Search list: %s , Match list: %s", len(searchDomains), len(matchDomains), searchDomains, matchDomains)
 	err = n.reApplyConnectionSettings(connSettings, configVersion)
 	if err != nil {
-		return fmt.Errorf("got an error while reapplying the connection with new settings, error: %s", err)
+		return fmt.Errorf("reapplying the connection with new settings, error: %w", err)
 	}
 	return nil
 }
 
 func (n *networkManagerDbusConfigurator) restoreHostDNS() error {
 	// once the interface is gone network manager cleans all config associated with it
-	return n.deleteConnectionSettings()
+	if err := n.deleteConnectionSettings(); err != nil {
+		return fmt.Errorf("delete connection settings: %w", err)
+	}
+
+	if err := removeUncleanShutdownIndicator(); err != nil {
+		log.Errorf("failed to remove unclean shutdown resolv.conf backup: %s", err)
+	}
+
+	return nil
 }
 
 func (n *networkManagerDbusConfigurator) getAppliedConnectionSettings() (networkManagerConnSettings, networkManagerConfigVersion, error) {
 	obj, closeConn, err := getDbusObject(networkManagerDest, n.dbusLinkObject)
 	if err != nil {
-		return nil, 0, fmt.Errorf("got error while attempting to retrieve the applied connection settings, err: %s", err)
+		return nil, 0, fmt.Errorf("attempting to retrieve the applied connection settings, err: %w", err)
 	}
 	defer closeConn()
 
@@ -176,7 +196,7 @@ func (n *networkManagerDbusConfigurator) getAppliedConnectionSettings() (network
 	err = obj.CallWithContext(ctx, networkManagerDbusDeviceGetAppliedConnectionMethod, dbusDefaultFlag,
 		networkManagerDbusDefaultBehaviorFlag).Store(&connSettings, &configVersion)
 	if err != nil {
-		return nil, 0, fmt.Errorf("got error while calling GetAppliedConnection method with context, err: %s", err)
+		return nil, 0, fmt.Errorf("calling GetAppliedConnection method with context, err: %w", err)
 	}
 
 	return connSettings, configVersion, nil
@@ -185,7 +205,7 @@ func (n *networkManagerDbusConfigurator) getAppliedConnectionSettings() (network
 func (n *networkManagerDbusConfigurator) reApplyConnectionSettings(connSettings networkManagerConnSettings, configVersion networkManagerConfigVersion) error {
 	obj, closeConn, err := getDbusObject(networkManagerDest, n.dbusLinkObject)
 	if err != nil {
-		return fmt.Errorf("got error while attempting to retrieve the applied connection settings, err: %s", err)
+		return fmt.Errorf("attempting to retrieve the applied connection settings, err: %w", err)
 	}
 	defer closeConn()
 
@@ -195,7 +215,7 @@ func (n *networkManagerDbusConfigurator) reApplyConnectionSettings(connSettings
 	err = obj.CallWithContext(ctx, networkManagerDbusDeviceReapplyMethod, dbusDefaultFlag,
 		connSettings, configVersion, networkManagerDbusDefaultBehaviorFlag).Store()
 	if err != nil {
-		return fmt.Errorf("got error while calling ReApply method with context, err: %s", err)
+		return fmt.Errorf("calling ReApply method with context, err: %w", err)
 	}
 
 	return nil
@@ -204,21 +224,34 @@ func (n *networkManagerDbusConfigurator) reApplyConnectionSettings(connSettings
 func (n *networkManagerDbusConfigurator) deleteConnectionSettings() error {
 	obj, closeConn, err := getDbusObject(networkManagerDest, n.dbusLinkObject)
 	if err != nil {
-		return fmt.Errorf("got error while attempting to retrieve the applied connection settings, err: %s", err)
+		return fmt.Errorf("attempting to retrieve the applied connection settings, err: %w", err)
 	}
 	defer closeConn()
 
 	ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
 	defer cancel()
 
+	// this call is required to remove the device for DNS cleanup, even if it fails
 	err = obj.CallWithContext(ctx, networkManagerDbusDeviceDeleteMethod, dbusDefaultFlag).Store()
 	if err != nil {
-		return fmt.Errorf("got error while calling delete method with context, err: %s", err)
+		var dbusErr dbus.Error
+		if errors.As(err, &dbusErr) && dbusErr.Name == dbus.ErrMsgUnknownMethod.Name {
+			// interface is gone already
+			return nil
+		}
+		return fmt.Errorf("calling delete method with context, err: %s", err)
 	}
 
 	return nil
 }
 
+func (n *networkManagerDbusConfigurator) restoreUncleanShutdownDNS(*netip.Addr) error {
+	if err := n.restoreHostDNS(); err != nil {
+		return fmt.Errorf("restoring dns via network-manager: %w", err)
+	}
+	return nil
+}
+
 func isNetworkManagerSupported() bool {
 	return isNetworkManagerSupportedVersion() && isNetworkManagerSupportedMode()
 }
@@ -250,13 +283,13 @@ func isNetworkManagerSupportedMode() bool {
 func getNetworkManagerDNSProperty(property string, store any) error {
 	obj, closeConn, err := getDbusObject(networkManagerDest, networkManagerDbusDNSManagerObjectNode)
 	if err != nil {
-		return fmt.Errorf("got error while attempting to retrieve the network manager dns manager object, error: %s", err)
+		return fmt.Errorf("attempting to retrieve the network manager dns manager object, error: %w", err)
 	}
 	defer closeConn()
 
 	v, e := obj.GetProperty(property)
 	if e != nil {
-		return fmt.Errorf("got an error getting property %s: %v", property, e)
+		return fmt.Errorf("getting property %s: %w", property, e)
 	}
 
 	return v.Store(store)
@@ -278,15 +311,26 @@ func isNetworkManagerSupportedVersion() bool {
 	}
 	versionValue, err := parseVersion(value.Value().(string))
 	if err != nil {
+		log.Errorf("nm: parse version: %s", err)
 		return false
 	}
 
-	constraints, err := version.NewConstraint(supportedNetworkManagerVersionConstraint)
-	if err != nil {
-		return false
+	var supported bool
+	for _, constraint := range supportedNetworkManagerVersionConstraints {
+		constr, err := version.NewConstraint(constraint)
+		if err != nil {
+			log.Errorf("nm: create constraint: %s", err)
+			return false
+		}
+
+		if met := constr.Check(versionValue); met {
+			supported = true
+			break
+		}
 	}
 
-	return constraints.Check(versionValue)
+	log.Debugf("network manager constraints [%s] met: %t", strings.Join(supportedNetworkManagerVersionConstraints, " | "), supported)
+	return supported
 }
 
 func parseVersion(inputVersion string) (*version.Version, error) {

client/internal/dns/resolvconf_unix.go

@@ -1,10 +1,11 @@
-//go:build !android
+//go:build (linux && !android) || freebsd
 
 package dns
 
 import (
 	"bytes"
 	"fmt"
+	"net/netip"
 	"os/exec"
 
 	log "github.com/sirupsen/logrus"
@@ -21,14 +22,14 @@ type resolvconf struct {
 }
 
 // supported "openresolv" only
-func newResolvConfConfigurator(wgInterface WGIface) (hostManager, error) {
+func newResolvConfConfigurator(wgInterface string) (hostManager, error) {
 	resolvConfEntries, err := parseDefaultResolvConf()
 	if err != nil {
-		log.Error(err)
+		log.Errorf("could not read original search domains from %s: %s", defaultResolvConfPath, err)
 	}
 
 	return &resolvconf{
-		ifaceName:             wgInterface.Name(),
+		ifaceName:             wgInterface,
 		originalSearchDomains: resolvConfEntries.searchDomains,
 		originalNameServers:   resolvConfEntries.nameServers,
 		othersConfigs:         resolvConfEntries.others,
@@ -44,7 +45,7 @@ func (r *resolvconf) applyDNSConfig(config HostDNSConfig) error {
 	if !config.RouteAll {
 		err = r.restoreHostDNS()
 		if err != nil {
-			log.Error(err)
+			log.Errorf("restore host dns: %s", err)
 		}
 		return fmt.Errorf("unable to configure DNS for this peer using resolvconf manager without a nameserver group with all domains configured")
 	}
@@ -52,14 +53,21 @@ func (r *resolvconf) applyDNSConfig(config HostDNSConfig) error {
 	searchDomainList := searchDomains(config)
 	searchDomainList = mergeSearchDomains(searchDomainList, r.originalSearchDomains)
 
+	options := prepareOptionsWithTimeout(r.othersConfigs, int(dnsFailoverTimeout.Seconds()), dnsFailoverAttempts)
+
 	buf := prepareResolvConfContent(
 		searchDomainList,
 		append([]string{config.ServerIP}, r.originalNameServers...),
-		r.othersConfigs)
+		options)
+
+	// create a backup for unclean shutdown detection before the resolv.conf is changed
+	if err := createUncleanShutdownIndicator(defaultResolvConfPath, resolvConfManager, config.ServerIP); err != nil {
+		log.Errorf("failed to create unclean shutdown resolv.conf backup: %s", err)
+	}
 
 	err = r.applyConfig(buf)
 	if err != nil {
-		return err
+		return fmt.Errorf("apply config: %w", err)
 	}
 
 	log.Infof("added %d search domains. Search list: %s", len(searchDomainList), searchDomainList)
@@ -67,20 +75,34 @@ func (r *resolvconf) applyDNSConfig(config HostDNSConfig) error {
 }
 
 func (r *resolvconf) restoreHostDNS() error {
+	// openresolv only, debian resolvconf doesn't support "-f"
 	cmd := exec.Command(resolvconfCommand, "-f", "-d", r.ifaceName)
 	_, err := cmd.Output()
 	if err != nil {
-		return fmt.Errorf("got an error while removing resolvconf configuration for %s interface, error: %s", r.ifaceName, err)
+		return fmt.Errorf("removing resolvconf configuration for %s interface, error: %w", r.ifaceName, err)
 	}
+
+	if err := removeUncleanShutdownIndicator(); err != nil {
+		log.Errorf("failed to remove unclean shutdown resolv.conf backup: %s", err)
+	}
+
 	return nil
 }
 
 func (r *resolvconf) applyConfig(content bytes.Buffer) error {
+	// openresolv only, debian resolvconf doesn't support "-x"
 	cmd := exec.Command(resolvconfCommand, "-x", "-a", r.ifaceName)
 	cmd.Stdin = &content
 	_, err := cmd.Output()
 	if err != nil {
-		return fmt.Errorf("got an error while applying resolvconf configuration for %s interface, error: %s", r.ifaceName, err)
+		return fmt.Errorf("applying resolvconf configuration for %s interface, error: %w", r.ifaceName, err)
+	}
+	return nil
+}
+
+func (r *resolvconf) restoreUncleanShutdownDNS(*netip.Addr) error {
+	if err := r.restoreHostDNS(); err != nil {
+		return fmt.Errorf("restoring dns for interface %s: %w", r.ifaceName, err)
 	}
 	return nil
 }

client/internal/dns/response_writer.go

@@ -31,10 +31,13 @@ func (r *responseWriter) RemoteAddr() net.Addr {
 func (r *responseWriter) WriteMsg(msg *dns.Msg) error {
 	buff, err := msg.Pack()
 	if err != nil {
-		return err
+		return fmt.Errorf("pack: %w", err)
 	}
-	_, err = r.Write(buff)
-	return err
+
+	if _, err := r.Write(buff); err != nil {
+		return fmt.Errorf("write: %w", err)
+	}
+	return nil
 }
 
 // Write writes a raw buffer back to the client.

client/internal/dns/server.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"fmt"
 	"net/netip"
+	"runtime"
+	"strings"
 	"sync"
 
 	"github.com/miekg/dns"
@@ -11,6 +13,7 @@ import (
 	log "github.com/sirupsen/logrus"
 
 	"github.com/netbirdio/netbird/client/internal/listener"
+	"github.com/netbirdio/netbird/client/internal/peer"
 	nbdns "github.com/netbirdio/netbird/dns"
 )
 
@@ -52,13 +55,14 @@ type DefaultServer struct {
 	currentConfig      HostDNSConfig
 
 	// permanent related properties
-	permanent        bool
-	hostsDnsList     []string
-	hostsDnsListLock sync.Mutex
+	permanent      bool
+	hostsDNSHolder *hostsDNSHolder
 
 	// make sense on mobile only
 	searchDomainNotifier *notifier
 	iosDnsManager        IosDnsManager
+
+	statusRecorder *peer.Status
 }
 
 type handlerWithStop interface {
@@ -73,7 +77,12 @@ type muxUpdate struct {
 }
 
 // NewDefaultServer returns a new dns server
-func NewDefaultServer(ctx context.Context, wgInterface WGIface, customAddress string) (*DefaultServer, error) {
+func NewDefaultServer(
+	ctx context.Context,
+	wgInterface WGIface,
+	customAddress string,
+	statusRecorder *peer.Status,
+) (*DefaultServer, error) {
 	var addrPort *netip.AddrPort
 	if customAddress != "" {
 		parsedAddrPort, err := netip.ParseAddrPort(customAddress)
@@ -85,20 +94,27 @@ func NewDefaultServer(ctx context.Context, wgInterface WGIface, customAddress st
 
 	var dnsService service
 	if wgInterface.IsUserspaceBind() {
-		dnsService = newServiceViaMemory(wgInterface)
+		dnsService = NewServiceViaMemory(wgInterface)
 	} else {
 		dnsService = newServiceViaListener(wgInterface, addrPort)
 	}
 
-	return newDefaultServer(ctx, wgInterface, dnsService), nil
+	return newDefaultServer(ctx, wgInterface, dnsService, statusRecorder), nil
 }
 
 // NewDefaultServerPermanentUpstream returns a new dns server. It optimized for mobile systems
-func NewDefaultServerPermanentUpstream(ctx context.Context, wgInterface WGIface, hostsDnsList []string, config nbdns.Config, listener listener.NetworkChangeListener) *DefaultServer {
+func NewDefaultServerPermanentUpstream(
+	ctx context.Context,
+	wgInterface WGIface,
+	hostsDnsList []string,
+	config nbdns.Config,
+	listener listener.NetworkChangeListener,
+	statusRecorder *peer.Status,
+) *DefaultServer {
 	log.Debugf("host dns address list is: %v", hostsDnsList)
-	ds := newDefaultServer(ctx, wgInterface, newServiceViaMemory(wgInterface))
+	ds := newDefaultServer(ctx, wgInterface, NewServiceViaMemory(wgInterface), statusRecorder)
+	ds.hostsDNSHolder.set(hostsDnsList)
 	ds.permanent = true
-	ds.hostsDnsList = hostsDnsList
 	ds.addHostRootZone()
 	ds.currentConfig = dnsConfigToHostDNSConfig(config, ds.service.RuntimeIP(), ds.service.RuntimePort())
 	ds.searchDomainNotifier = newNotifier(ds.SearchDomains())
@@ -108,13 +124,18 @@ func NewDefaultServerPermanentUpstream(ctx context.Context, wgInterface WGIface,
 }
 
 // NewDefaultServerIos returns a new dns server. It optimized for ios
-func NewDefaultServerIos(ctx context.Context, wgInterface WGIface, iosDnsManager IosDnsManager) *DefaultServer {
-	ds := newDefaultServer(ctx, wgInterface, newServiceViaMemory(wgInterface))
+func NewDefaultServerIos(
+	ctx context.Context,
+	wgInterface WGIface,
+	iosDnsManager IosDnsManager,
+	statusRecorder *peer.Status,
+) *DefaultServer {
+	ds := newDefaultServer(ctx, wgInterface, NewServiceViaMemory(wgInterface), statusRecorder)
 	ds.iosDnsManager = iosDnsManager
 	return ds
 }
 
-func newDefaultServer(ctx context.Context, wgInterface WGIface, dnsService service) *DefaultServer {
+func newDefaultServer(ctx context.Context, wgInterface WGIface, dnsService service, statusRecorder *peer.Status) *DefaultServer {
 	ctx, stop := context.WithCancel(ctx)
 	defaultServer := &DefaultServer{
 		ctx:       ctx,
@@ -124,7 +145,9 @@ func newDefaultServer(ctx context.Context, wgInterface WGIface, dnsService servi
 		localResolver: &localResolver{
 			registeredMap: make(registrationMap),
 		},
-		wgInterface: wgInterface,
+		wgInterface:    wgInterface,
+		statusRecorder: statusRecorder,
+		hostsDNSHolder: newHostsDNSHolder(),
 	}
 
 	return defaultServer
@@ -142,12 +165,15 @@ func (s *DefaultServer) Initialize() (err error) {
 	if s.permanent {
 		err = s.service.Listen()
 		if err != nil {
-			return err
+			return fmt.Errorf("service listen: %w", err)
 		}
 	}
 
 	s.hostManager, err = s.initialize()
-	return err
+	if err != nil {
+		return fmt.Errorf("initialize: %w", err)
+	}
+	return nil
 }
 
 // DnsIP returns the DNS resolver server IP address
@@ -177,10 +203,8 @@ func (s *DefaultServer) Stop() {
 // OnUpdatedHostDNSServer update the DNS servers addresses for root zones
 // It will be applied if the mgm server do not enforce DNS settings for root zone
 func (s *DefaultServer) OnUpdatedHostDNSServer(hostsDnsList []string) {
-	s.hostsDnsListLock.Lock()
-	defer s.hostsDnsListLock.Unlock()
+	s.hostsDNSHolder.set(hostsDnsList)
 
-	s.hostsDnsList = hostsDnsList
 	_, ok := s.dnsMuxMap[nbdns.RootZone]
 	if ok {
 		log.Debugf("on new host DNS config but skip to apply it")
@@ -225,7 +249,7 @@ func (s *DefaultServer) UpdateDNSServer(serial uint64, update nbdns.Config) erro
 		}
 
 		if err := s.applyConfiguration(update); err != nil {
-			return err
+			return fmt.Errorf("apply configuration: %w", err)
 		}
 
 		s.updateSerial = serial
@@ -253,9 +277,15 @@ func (s *DefaultServer) SearchDomains() []string {
 // ProbeAvailability tests each upstream group's servers for availability
 // and deactivates the group if no server responds
 func (s *DefaultServer) ProbeAvailability() {
+	var wg sync.WaitGroup
 	for _, mux := range s.dnsMuxMap {
-		mux.probeAvailability()
+		wg.Add(1)
+		go func(mux handlerWithStop) {
+			defer wg.Done()
+			mux.probeAvailability()
+		}(mux)
 	}
+	wg.Wait()
 }
 
 func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
@@ -296,6 +326,8 @@ func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
 		s.searchDomainNotifier.onNewSearchDomains(s.SearchDomains())
 	}
 
+	s.updateNSGroupStates(update.NameServerGroups)
+
 	return nil
 }
 
@@ -335,7 +367,14 @@ func (s *DefaultServer) buildUpstreamHandlerUpdate(nameServerGroups []*nbdns.Nam
 			continue
 		}
 
-		handler, err := newUpstreamResolver(s.ctx, s.wgInterface.Name(), s.wgInterface.Address().IP, s.wgInterface.Address().Network)
+		handler, err := newUpstreamResolver(
+			s.ctx,
+			s.wgInterface.Name(),
+			s.wgInterface.Address().IP,
+			s.wgInterface.Address().Network,
+			s.statusRecorder,
+			s.hostsDNSHolder,
+		)
 		if err != nil {
 			return nil, fmt.Errorf("unable to create a new upstream resolver, error: %v", err)
 		}
@@ -413,9 +452,7 @@ func (s *DefaultServer) updateMux(muxUpdates []muxUpdate) {
 		_, found := muxUpdateMap[key]
 		if !found {
 			if !isContainRootUpdate && key == nbdns.RootZone {
-				s.hostsDnsListLock.Lock()
 				s.addHostRootZone()
-				s.hostsDnsListLock.Unlock()
 				existingHandler.stop()
 			} else {
 				existingHandler.stop()
@@ -457,14 +494,14 @@ func getNSHostPort(ns nbdns.NameServer) string {
 func (s *DefaultServer) upstreamCallbacks(
 	nsGroup *nbdns.NameServerGroup,
 	handler dns.Handler,
-) (deactivate func(), reactivate func()) {
+) (deactivate func(error), reactivate func()) {
 	var removeIndex map[string]int
-	deactivate = func() {
+	deactivate = func(err error) {
 		s.mux.Lock()
 		defer s.mux.Unlock()
 
 		l := log.WithField("nameservers", nsGroup.NameServers)
-		l.Info("temporary deactivate nameservers group due timeout")
+		l.Info("Temporarily deactivating nameservers group due to timeout")
 
 		removeIndex = make(map[string]int)
 		for _, domain := range nsGroup.Domains {
@@ -473,6 +510,7 @@ func (s *DefaultServer) upstreamCallbacks(
 		if nsGroup.Primary {
 			removeIndex[nbdns.RootZone] = -1
 			s.currentConfig.RouteAll = false
+			s.service.DeregisterMux(nbdns.RootZone)
 		}
 
 		for i, item := range s.currentConfig.Domains {
@@ -482,9 +520,17 @@ func (s *DefaultServer) upstreamCallbacks(
 				removeIndex[item.Domain] = i
 			}
 		}
+
 		if err := s.hostManager.applyDNSConfig(s.currentConfig); err != nil {
-			l.WithError(err).Error("fail to apply nameserver deactivation on the host")
+			l.Errorf("Failed to apply nameserver deactivation on the host: %v", err)
 		}
+
+		if runtime.GOOS == "android" && nsGroup.Primary && len(s.hostsDNSHolder.get()) > 0 {
+			s.addHostRootZone()
+		}
+
+		s.updateNSState(nsGroup, err, false)
+
 	}
 	reactivate = func() {
 		s.mux.Lock()
@@ -503,36 +549,79 @@ func (s *DefaultServer) upstreamCallbacks(
 
 		if nsGroup.Primary {
 			s.currentConfig.RouteAll = true
+			s.service.RegisterMux(nbdns.RootZone, handler)
 		}
 		if err := s.hostManager.applyDNSConfig(s.currentConfig); err != nil {
 			l.WithError(err).Error("reactivate temporary disabled nameserver group, DNS update apply")
 		}
+
+		s.updateNSState(nsGroup, nil, true)
 	}
 	return
 }
 
 func (s *DefaultServer) addHostRootZone() {
-	handler, err := newUpstreamResolver(s.ctx, s.wgInterface.Name(), s.wgInterface.Address().IP, s.wgInterface.Address().Network)
+	handler, err := newUpstreamResolver(
+		s.ctx,
+		s.wgInterface.Name(),
+		s.wgInterface.Address().IP,
+		s.wgInterface.Address().Network,
+		s.statusRecorder,
+		s.hostsDNSHolder,
+	)
 	if err != nil {
 		log.Errorf("unable to create a new upstream resolver, error: %v", err)
 		return
 	}
-	handler.upstreamServers = make([]string, len(s.hostsDnsList))
-	for n, ua := range s.hostsDnsList {
-		a, err := netip.ParseAddr(ua)
-		if err != nil {
-			log.Errorf("invalid upstream IP address: %s, error: %s", ua, err)
-			continue
-		}
 
-		ipString := ua
-		if !a.Is4() {
-			ipString = fmt.Sprintf("[%s]", ua)
-		}
-
-		handler.upstreamServers[n] = fmt.Sprintf("%s:53", ipString)
+	handler.upstreamServers = make([]string, 0)
+	for k := range s.hostsDNSHolder.get() {
+		handler.upstreamServers = append(handler.upstreamServers, k)
 	}
-	handler.deactivate = func() {}
+	handler.deactivate = func(error) {}
 	handler.reactivate = func() {}
 	s.service.RegisterMux(nbdns.RootZone, handler)
 }
+
+func (s *DefaultServer) updateNSGroupStates(groups []*nbdns.NameServerGroup) {
+	var states []peer.NSGroupState
+
+	for _, group := range groups {
+		var servers []string
+		for _, ns := range group.NameServers {
+			servers = append(servers, fmt.Sprintf("%s:%d", ns.IP, ns.Port))
+		}
+
+		state := peer.NSGroupState{
+			ID:      generateGroupKey(group),
+			Servers: servers,
+			Domains: group.Domains,
+			// The probe will determine the state, default enabled
+			Enabled: true,
+			Error:   nil,
+		}
+		states = append(states, state)
+	}
+	s.statusRecorder.UpdateDNSStates(states)
+}
+
+func (s *DefaultServer) updateNSState(nsGroup *nbdns.NameServerGroup, err error, enabled bool) {
+	states := s.statusRecorder.GetDNSStates()
+	id := generateGroupKey(nsGroup)
+	for i, state := range states {
+		if state.ID == id {
+			states[i].Enabled = enabled
+			states[i].Error = err
+			break
+		}
+	}
+	s.statusRecorder.UpdateDNSStates(states)
+}
+
+func generateGroupKey(nsGroup *nbdns.NameServerGroup) string {
+	var servers []string
+	for _, ns := range nsGroup.NameServers {
+		servers = append(servers, fmt.Sprintf("%s:%d", ns.IP, ns.Port))
+	}
+	return fmt.Sprintf("%s_%s_%s", nsGroup.ID, nsGroup.Name, strings.Join(servers, ","))
+}

client/internal/dns/server_android.go

@@ -1,5 +1,5 @@
 package dns
 
 func (s *DefaultServer) initialize() (manager hostManager, err error) {
-	return newHostManager(s.wgInterface)
+	return newHostManager()
 }

client/internal/dns/server_darwin.go

@@ -3,5 +3,5 @@
 package dns
 
 func (s *DefaultServer) initialize() (manager hostManager, err error) {
-	return newHostManager(s.wgInterface)
+	return newHostManager()
 }

client/internal/dns/server_test.go

@@ -15,6 +15,7 @@ import (
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 
 	"github.com/netbirdio/netbird/client/firewall/uspfilter"
+	"github.com/netbirdio/netbird/client/internal/peer"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
 	nbdns "github.com/netbirdio/netbird/dns"
 	"github.com/netbirdio/netbird/formatter"
@@ -38,6 +39,10 @@ func (w *mocWGIface) Address() iface.WGAddress {
 	}
 }
 
+func (w *mocWGIface) ToInterface() *net.Interface {
+	panic("implement me")
+}
+
 func (w *mocWGIface) GetFilter() iface.PacketFilter {
 	return w.filter
 }
@@ -260,7 +265,7 @@ func TestUpdateDNSServer(t *testing.T) {
 			if err != nil {
 				t.Fatal(err)
 			}
-			wgIface, err := iface.NewWGIFace(fmt.Sprintf("utun230%d", n), fmt.Sprintf("100.66.100.%d/32", n+1), 33100, privKey.String(), iface.DefaultMTU, newNet, nil)
+			wgIface, err := iface.NewWGIFace(fmt.Sprintf("utun230%d", n), fmt.Sprintf("100.66.100.%d/32", n+1), 33100, privKey.String(), iface.DefaultMTU, newNet, nil, nil)
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -274,7 +279,7 @@ func TestUpdateDNSServer(t *testing.T) {
 					t.Log(err)
 				}
 			}()
-			dnsServer, err := NewDefaultServer(context.Background(), wgIface, "")
+			dnsServer, err := NewDefaultServer(context.Background(), wgIface, "", &peer.Status{})
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -338,7 +343,7 @@ func TestDNSFakeResolverHandleUpdates(t *testing.T) {
 	}
 
 	privKey, _ := wgtypes.GeneratePrivateKey()
-	wgIface, err := iface.NewWGIFace("utun2301", "100.66.100.1/32", 33100, privKey.String(), iface.DefaultMTU, newNet, nil)
+	wgIface, err := iface.NewWGIFace("utun2301", "100.66.100.1/32", 33100, privKey.String(), iface.DefaultMTU, newNet, nil, nil)
 	if err != nil {
 		t.Errorf("build interface wireguard: %v", err)
 		return
@@ -375,7 +380,7 @@ func TestDNSFakeResolverHandleUpdates(t *testing.T) {
 		return
 	}
 
-	dnsServer, err := NewDefaultServer(context.Background(), wgIface, "")
+	dnsServer, err := NewDefaultServer(context.Background(), wgIface, "", &peer.Status{})
 	if err != nil {
 		t.Errorf("create DNS server: %v", err)
 		return
@@ -470,7 +475,7 @@ func TestDNSServerStartStop(t *testing.T) {
 
 	for _, testCase := range testCases {
 		t.Run(testCase.name, func(t *testing.T) {
-			dnsServer, err := NewDefaultServer(context.Background(), &mocWGIface{}, testCase.addrPort)
+			dnsServer, err := NewDefaultServer(context.Background(), &mocWGIface{}, testCase.addrPort, &peer.Status{})
 			if err != nil {
 				t.Fatalf("%v", err)
 			}
@@ -529,7 +534,7 @@ func TestDNSServerStartStop(t *testing.T) {
 func TestDNSServerUpstreamDeactivateCallback(t *testing.T) {
 	hostManager := &mockHostConfigurator{}
 	server := DefaultServer{
-		service: newServiceViaMemory(&mocWGIface{}),
+		service: NewServiceViaMemory(&mocWGIface{}),
 		localResolver: &localResolver{
 			registeredMap: make(registrationMap),
 		},
@@ -541,6 +546,7 @@ func TestDNSServerUpstreamDeactivateCallback(t *testing.T) {
 				{false, "domain2", false},
 			},
 		},
+		statusRecorder: &peer.Status{},
 	}
 
 	var domainsUpdate string
@@ -563,7 +569,7 @@ func TestDNSServerUpstreamDeactivateCallback(t *testing.T) {
 		},
 	}, nil)
 
-	deactivate()
+	deactivate(nil)
 	expected := "domain0,domain2"
 	domains := []string{}
 	for _, item := range server.currentConfig.Domains {
@@ -601,7 +607,7 @@ func TestDNSPermanent_updateHostDNS_emptyUpstream(t *testing.T) {
 
 	var dnsList []string
 	dnsConfig := nbdns.Config{}
-	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, dnsList, dnsConfig, nil)
+	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, dnsList, dnsConfig, nil, &peer.Status{})
 	err = dnsServer.Initialize()
 	if err != nil {
 		t.Errorf("failed to initialize DNS server: %v", err)
@@ -625,7 +631,7 @@ func TestDNSPermanent_updateUpstream(t *testing.T) {
 	}
 	defer wgIFace.Close()
 	dnsConfig := nbdns.Config{}
-	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"}, dnsConfig, nil)
+	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"}, dnsConfig, nil, &peer.Status{})
 	err = dnsServer.Initialize()
 	if err != nil {
 		t.Errorf("failed to initialize DNS server: %v", err)
@@ -717,7 +723,7 @@ func TestDNSPermanent_matchOnly(t *testing.T) {
 	}
 	defer wgIFace.Close()
 	dnsConfig := nbdns.Config{}
-	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"}, dnsConfig, nil)
+	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"}, dnsConfig, nil, &peer.Status{})
 	err = dnsServer.Initialize()
 	if err != nil {
 		t.Errorf("failed to initialize DNS server: %v", err)
@@ -748,6 +754,11 @@ func TestDNSPermanent_matchOnly(t *testing.T) {
 						NSType: nbdns.UDPNameServerType,
 						Port:   53,
 					},
+					{
+						IP:     netip.MustParseAddr("9.9.9.9"),
+						NSType: nbdns.UDPNameServerType,
+						Port:   53,
+					},
 				},
 				Domains: []string{"customdomain.com"},
 				Primary: false,
@@ -790,7 +801,7 @@ func createWgInterfaceWithBind(t *testing.T) (*iface.WGIface, error) {
 	}
 
 	privKey, _ := wgtypes.GeneratePrivateKey()
-	wgIface, err := iface.NewWGIFace("utun2301", "100.66.100.2/24", 33100, privKey.String(), iface.DefaultMTU, newNet, nil)
+	wgIface, err := iface.NewWGIFace("utun2301", "100.66.100.2/24", 33100, privKey.String(), iface.DefaultMTU, newNet, nil, nil)
 	if err != nil {
 		t.Fatalf("build interface wireguard: %v", err)
 		return nil, err

client/internal/dns/server_unix.go

@@ -1,7 +1,7 @@
-//go:build !android
+//go:build (linux && !android) || freebsd
 
 package dns
 
 func (s *DefaultServer) initialize() (manager hostManager, err error) {
-	return newHostManager(s.wgInterface)
+	return newHostManager(s.wgInterface.Name())
 }

client/internal/dns/service_listener.go

@@ -28,7 +28,7 @@ type serviceViaListener struct {
 	customAddr        *netip.AddrPort
 	server            *dns.Server
 	listenIP          string
-	listenPort        int
+	listenPort        uint16
 	listenerIsRunning bool
 	listenerFlagLock  sync.Mutex
 	ebpfService       ebpfMgr.Manager
@@ -63,18 +63,9 @@ func (s *serviceViaListener) Listen() error {
 	s.listenIP, s.listenPort, err = s.evalListenAddress()
 	if err != nil {
 		log.Errorf("failed to eval runtime address: %s", err)
-		return err
+		return fmt.Errorf("eval listen address: %w", err)
 	}
 	s.server.Addr = fmt.Sprintf("%s:%d", s.listenIP, s.listenPort)
-
-	if s.shouldApplyPortFwd() {
-		s.ebpfService = ebpf.GetEbpfManagerInstance()
-		err = s.ebpfService.LoadDNSFwd(s.listenIP, s.listenPort)
-		if err != nil {
-			log.Warnf("failed to load DNS port forwarder, custom port may not work well on some Linux operating systems: %s", err)
-			s.ebpfService = nil
-		}
-	}
 	log.Debugf("starting dns on %s", s.server.Addr)
 	go func() {
 		s.setListenerStatus(true)
@@ -128,7 +119,7 @@ func (s *serviceViaListener) RuntimePort() int {
 	if s.ebpfService != nil {
 		return defaultPort
 	} else {
-		return s.listenPort
+		return int(s.listenPort)
 	}
 }
 
@@ -137,57 +128,118 @@ func (s *serviceViaListener) RuntimeIP() string {
 }
 
 func (s *serviceViaListener) setListenerStatus(running bool) {
+	s.listenerFlagLock.Lock()
+	defer s.listenerFlagLock.Unlock()
+
 	s.listenerIsRunning = running
 }
 
-func (s *serviceViaListener) getFirstListenerAvailable() (string, int, error) {
-	ips := []string{defaultIP, customIP}
+// evalListenAddress figure out the listen address for the DNS server
+// first check the 53 port availability on WG interface or lo, if not success
+// pick a random port on WG interface for eBPF, if not success
+// check the 5053 port availability on WG interface or lo without eBPF usage,
+func (s *serviceViaListener) evalListenAddress() (string, uint16, error) {
+	if s.customAddr != nil {
+		return s.customAddr.Addr().String(), s.customAddr.Port(), nil
+	}
+
+	ip, ok := s.testFreePort(defaultPort)
+	if ok {
+		return ip, defaultPort, nil
+	}
+
+	ebpfSrv, port, ok := s.tryToUseeBPF()
+	if ok {
+		s.ebpfService = ebpfSrv
+		return s.wgInterface.Address().IP.String(), port, nil
+	}
+
+	ip, ok = s.testFreePort(customPort)
+	if ok {
+		return ip, customPort, nil
+	}
+
+	return "", 0, fmt.Errorf("failed to find a free port for DNS server")
+}
+
+func (s *serviceViaListener) testFreePort(port int) (string, bool) {
+	var ips []string
 	if runtime.GOOS != "darwin" {
-		ips = append([]string{s.wgInterface.Address().IP.String()}, ips...)
+		ips = []string{s.wgInterface.Address().IP.String(), defaultIP, customIP}
+	} else {
+		ips = []string{defaultIP, customIP}
 	}
-	ports := []int{defaultPort, customPort}
-	for _, port := range ports {
-		for _, ip := range ips {
-			addrString := fmt.Sprintf("%s:%d", ip, port)
-			udpAddr := net.UDPAddrFromAddrPort(netip.MustParseAddrPort(addrString))
-			probeListener, err := net.ListenUDP("udp", udpAddr)
-			if err == nil {
-				err = probeListener.Close()
-				if err != nil {
-					log.Errorf("got an error closing the probe listener, error: %s", err)
-				}
-				return ip, port, nil
-			}
-			log.Warnf("binding dns on %s is not available, error: %s", addrString, err)
+
+	for _, ip := range ips {
+		if !s.tryToBind(ip, port) {
+			continue
 		}
+
+		return ip, true
 	}
-	return "", 0, fmt.Errorf("unable to find an unused ip and port combination. IPs tested: %v and ports %v", ips, ports)
+	return "", false
 }
 
-func (s *serviceViaListener) evalListenAddress() (string, int, error) {
-	if s.customAddr != nil {
-		return s.customAddr.Addr().String(), int(s.customAddr.Port()), nil
-	}
-
-	return s.getFirstListenerAvailable()
-}
-
-// shouldApplyPortFwd decides whether to apply eBPF program to capture DNS traffic on port 53.
-// This is needed because on some operating systems if we start a DNS server not on a default port 53, the domain name
-// resolution won't work.
-// So, in case we are running on Linux and picked a non-default port (53) we should fall back to the eBPF solution that will capture
-// traffic on port 53 and forward it to a local DNS server running on 5053.
-func (s *serviceViaListener) shouldApplyPortFwd() bool {
-	if runtime.GOOS != "linux" {
+func (s *serviceViaListener) tryToBind(ip string, port int) bool {
+	addrString := fmt.Sprintf("%s:%d", ip, port)
+	udpAddr := net.UDPAddrFromAddrPort(netip.MustParseAddrPort(addrString))
+	probeListener, err := net.ListenUDP("udp", udpAddr)
+	if err != nil {
+		log.Warnf("binding dns on %s is not available, error: %s", addrString, err)
 		return false
 	}
 
-	if s.customAddr != nil {
-		return false
-	}
-
-	if s.listenPort == defaultPort {
-		return false
+	err = probeListener.Close()
+	if err != nil {
+		log.Errorf("got an error closing the probe listener, error: %s", err)
 	}
 	return true
 }
+
+// tryToUseeBPF decides whether to apply eBPF program to capture DNS traffic on port 53.
+// This is needed because on some operating systems if we start a DNS server not on a default port 53,
+// the domain name  resolution won't work. So, in case we are running on Linux and picked a free
+// port we should fall back to the eBPF solution that will capture traffic on port 53 and forward
+// it to a local DNS server running on the chosen port.
+func (s *serviceViaListener) tryToUseeBPF() (ebpfMgr.Manager, uint16, bool) {
+	if runtime.GOOS != "linux" {
+		return nil, 0, false
+	}
+
+	port, err := s.generateFreePort() //nolint:staticcheck,unused
+	if err != nil {
+		log.Warnf("failed to generate a free port for eBPF DNS forwarder server: %s", err)
+		return nil, 0, false
+	}
+
+	ebpfSrv := ebpf.GetEbpfManagerInstance()
+	err = ebpfSrv.LoadDNSFwd(s.wgInterface.Address().IP.String(), int(port))
+	if err != nil {
+		log.Warnf("failed to load DNS forwarder eBPF program, error: %s", err)
+		return nil, 0, false
+	}
+
+	return ebpfSrv, port, true
+}
+
+func (s *serviceViaListener) generateFreePort() (uint16, error) {
+	ok := s.tryToBind(s.wgInterface.Address().IP.String(), customPort)
+	if ok {
+		return customPort, nil
+	}
+
+	udpAddr := net.UDPAddrFromAddrPort(netip.MustParseAddrPort("0.0.0.0:0"))
+	probeListener, err := net.ListenUDP("udp", udpAddr)
+	if err != nil {
+		log.Debugf("failed to bind random port for DNS: %s", err)
+		return 0, err
+	}
+
+	addrPort := netip.MustParseAddrPort(probeListener.LocalAddr().String()) // might panic if address is incorrect
+	err = probeListener.Close()
+	if err != nil {
+		log.Debugf("failed to free up DNS port: %s", err)
+		return 0, err
+	}
+	return addrPort.Port(), nil
+}

client/internal/dns/service_memory.go

@@ -12,7 +12,7 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
-type serviceViaMemory struct {
+type ServiceViaMemory struct {
 	wgInterface       WGIface
 	dnsMux            *dns.ServeMux
 	runtimeIP         string
@@ -22,8 +22,8 @@ type serviceViaMemory struct {
 	listenerFlagLock  sync.Mutex
 }
 
-func newServiceViaMemory(wgIface WGIface) *serviceViaMemory {
-	s := &serviceViaMemory{
+func NewServiceViaMemory(wgIface WGIface) *ServiceViaMemory {
+	s := &ServiceViaMemory{
 		wgInterface: wgIface,
 		dnsMux:      dns.NewServeMux(),
 
@@ -33,7 +33,7 @@ func newServiceViaMemory(wgIface WGIface) *serviceViaMemory {
 	return s
 }
 
-func (s *serviceViaMemory) Listen() error {
+func (s *ServiceViaMemory) Listen() error {
 	s.listenerFlagLock.Lock()
 	defer s.listenerFlagLock.Unlock()
 
@@ -44,7 +44,7 @@ func (s *serviceViaMemory) Listen() error {
 	var err error
 	s.udpFilterHookID, err = s.filterDNSTraffic()
 	if err != nil {
-		return err
+		return fmt.Errorf("filter dns traffice: %w", err)
 	}
 	s.listenerIsRunning = true
 
@@ -52,7 +52,7 @@ func (s *serviceViaMemory) Listen() error {
 	return nil
 }
 
-func (s *serviceViaMemory) Stop() {
+func (s *ServiceViaMemory) Stop() {
 	s.listenerFlagLock.Lock()
 	defer s.listenerFlagLock.Unlock()
 
@@ -67,23 +67,23 @@ func (s *serviceViaMemory) Stop() {
 	s.listenerIsRunning = false
 }
 
-func (s *serviceViaMemory) RegisterMux(pattern string, handler dns.Handler) {
+func (s *ServiceViaMemory) RegisterMux(pattern string, handler dns.Handler) {
 	s.dnsMux.Handle(pattern, handler)
 }
 
-func (s *serviceViaMemory) DeregisterMux(pattern string) {
+func (s *ServiceViaMemory) DeregisterMux(pattern string) {
 	s.dnsMux.HandleRemove(pattern)
 }
 
-func (s *serviceViaMemory) RuntimePort() int {
+func (s *ServiceViaMemory) RuntimePort() int {
 	return s.runtimePort
 }
 
-func (s *serviceViaMemory) RuntimeIP() string {
+func (s *ServiceViaMemory) RuntimeIP() string {
 	return s.runtimeIP
 }
 
-func (s *serviceViaMemory) filterDNSTraffic() (string, error) {
+func (s *ServiceViaMemory) filterDNSTraffic() (string, error) {
 	filter := s.wgInterface.GetFilter()
 	if filter == nil {
 		return "", fmt.Errorf("can't set DNS filter, filter not initialized")

client/internal/dns/systemd_freebsd.go

@@ -0,0 +1,20 @@
+package dns
+
+import (
+	"errors"
+	"fmt"
+)
+
+var errNotImplemented = errors.New("not implemented")
+
+func newSystemdDbusConfigurator(wgInterface string) (hostManager, error) {
+	return nil, fmt.Errorf("systemd dns management: %w on freebsd", errNotImplemented)
+}
+
+func isSystemdResolvedRunning() bool {
+	return false
+}
+
+func isSystemdResolveConfMode() bool {
+	return false
+}

client/internal/dns/systemd_linux.go

@@ -4,6 +4,7 @@ package dns
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net"
 	"net/netip"
@@ -30,6 +31,8 @@ const (
 	systemdDbusSetDefaultRouteMethodSuffix = systemdDbusLinkInterface + ".SetDefaultRoute"
 	systemdDbusSetDomainsMethodSuffix      = systemdDbusLinkInterface + ".SetDomains"
 	systemdDbusResolvConfModeForeign       = "foreign"
+
+	dbusErrorUnknownObject = "org.freedesktop.DBus.Error.UnknownObject"
 )
 
 type systemdDbusConfigurator struct {
@@ -52,22 +55,22 @@ type systemdDbusLinkDomainsInput struct {
 	MatchOnly bool
 }
 
-func newSystemdDbusConfigurator(wgInterface WGIface) (hostManager, error) {
-	iface, err := net.InterfaceByName(wgInterface.Name())
+func newSystemdDbusConfigurator(wgInterface string) (hostManager, error) {
+	iface, err := net.InterfaceByName(wgInterface)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("get interface: %w", err)
 	}
 
 	obj, closeConn, err := getDbusObject(systemdResolvedDest, systemdDbusObjectNode)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("get dbus resolved dest: %w", err)
 	}
 	defer closeConn()
 
 	var s string
 	err = obj.Call(systemdDbusGetLinkMethod, dbusDefaultFlag, iface.Index).Store(&s)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("get dbus link method: %w", err)
 	}
 
 	log.Debugf("got dbus Link interface: %s from net interface %s and index %d", s, iface.Name, iface.Index)
@@ -84,7 +87,7 @@ func (s *systemdDbusConfigurator) supportCustomPort() bool {
 func (s *systemdDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	parsedIP, err := netip.ParseAddr(config.ServerIP)
 	if err != nil {
-		return fmt.Errorf("unable to parse ip address, error: %s", err)
+		return fmt.Errorf("unable to parse ip address, error: %w", err)
 	}
 	ipAs4 := parsedIP.As4()
 	defaultLinkInput := systemdDbusDNSInput{
@@ -93,7 +96,7 @@ func (s *systemdDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	}
 	err = s.callLinkMethod(systemdDbusSetDNSMethodSuffix, []systemdDbusDNSInput{defaultLinkInput})
 	if err != nil {
-		return fmt.Errorf("setting the interface DNS server %s:%d failed with error: %s", config.ServerIP, config.ServerPort, err)
+		return fmt.Errorf("setting the interface DNS server %s:%d failed with error: %w", config.ServerIP, config.ServerPort, err)
 	}
 
 	var (
@@ -121,7 +124,7 @@ func (s *systemdDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		log.Infof("configured %s:%d as main DNS forwarder for this peer", config.ServerIP, config.ServerPort)
 		err = s.callLinkMethod(systemdDbusSetDefaultRouteMethodSuffix, true)
 		if err != nil {
-			return fmt.Errorf("setting link as default dns router, failed with error: %s", err)
+			return fmt.Errorf("setting link as default dns router, failed with error: %w", err)
 		}
 		domainsInput = append(domainsInput, systemdDbusLinkDomainsInput{
 			Domain:    nbdns.RootZone,
@@ -132,6 +135,12 @@ func (s *systemdDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		log.Infof("removing %s:%d as main DNS forwarder for this peer", config.ServerIP, config.ServerPort)
 	}
 
+	// create a backup for unclean shutdown detection before adding domains, as these might end up in the resolv.conf file.
+	// The file content itself is not important for systemd restoration
+	if err := createUncleanShutdownIndicator(defaultResolvConfPath, systemdManager, parsedIP.String()); err != nil {
+		log.Errorf("failed to create unclean shutdown resolv.conf backup: %s", err)
+	}
+
 	log.Infof("adding %d search domains and %d match domains. Search list: %s , Match list: %s", len(searchDomains), len(matchDomains), searchDomains, matchDomains)
 	err = s.setDomainsForInterface(domainsInput)
 	if err != nil {
@@ -143,7 +152,7 @@ func (s *systemdDbusConfigurator) applyDNSConfig(config HostDNSConfig) error {
 func (s *systemdDbusConfigurator) setDomainsForInterface(domainsInput []systemdDbusLinkDomainsInput) error {
 	err := s.callLinkMethod(systemdDbusSetDomainsMethodSuffix, domainsInput)
 	if err != nil {
-		return fmt.Errorf("setting domains configuration failed with error: %s", err)
+		return fmt.Errorf("setting domains configuration failed with error: %w", err)
 	}
 	return s.flushCaches()
 }
@@ -153,17 +162,29 @@ func (s *systemdDbusConfigurator) restoreHostDNS() error {
 	if !isDbusListenerRunning(systemdResolvedDest, s.dbusLinkObject) {
 		return nil
 	}
+
+	// this call is required for DNS cleanup, even if it fails
 	err := s.callLinkMethod(systemdDbusRevertMethodSuffix, nil)
 	if err != nil {
-		return fmt.Errorf("unable to revert link configuration, got error: %s", err)
+		var dbusErr dbus.Error
+		if errors.As(err, &dbusErr) && dbusErr.Name == dbusErrorUnknownObject {
+			// interface is gone already
+			return nil
+		}
+		return fmt.Errorf("unable to revert link configuration, got error: %w", err)
 	}
+
+	if err := removeUncleanShutdownIndicator(); err != nil {
+		log.Errorf("failed to remove unclean shutdown resolv.conf backup: %s", err)
+	}
+
 	return s.flushCaches()
 }
 
 func (s *systemdDbusConfigurator) flushCaches() error {
 	obj, closeConn, err := getDbusObject(systemdResolvedDest, systemdDbusObjectNode)
 	if err != nil {
-		return fmt.Errorf("got error while attempting to retrieve the object %s, err: %s", systemdDbusObjectNode, err)
+		return fmt.Errorf("attempting to retrieve the object %s, err: %w", systemdDbusObjectNode, err)
 	}
 	defer closeConn()
 	ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
@@ -171,7 +192,7 @@ func (s *systemdDbusConfigurator) flushCaches() error {
 
 	err = obj.CallWithContext(ctx, systemdDbusFlushCachesMethod, dbusDefaultFlag).Store()
 	if err != nil {
-		return fmt.Errorf("got error while calling the FlushCaches method with context, err: %s", err)
+		return fmt.Errorf("calling the FlushCaches method with context, err: %w", err)
 	}
 
 	return nil
@@ -180,7 +201,7 @@ func (s *systemdDbusConfigurator) flushCaches() error {
 func (s *systemdDbusConfigurator) callLinkMethod(method string, value any) error {
 	obj, closeConn, err := getDbusObject(systemdResolvedDest, s.dbusLinkObject)
 	if err != nil {
-		return fmt.Errorf("got error while attempting to retrieve the object, err: %s", err)
+		return fmt.Errorf("attempting to retrieve the object, err: %w", err)
 	}
 	defer closeConn()
 
@@ -194,23 +215,52 @@ func (s *systemdDbusConfigurator) callLinkMethod(method string, value any) error
 	}
 
 	if err != nil {
-		return fmt.Errorf("got error while calling command with context, err: %s", err)
+		return fmt.Errorf("calling command with context, err: %w", err)
 	}
 
 	return nil
 }
 
+func (s *systemdDbusConfigurator) restoreUncleanShutdownDNS(*netip.Addr) error {
+	if err := s.restoreHostDNS(); err != nil {
+		return fmt.Errorf("restoring dns via systemd: %w", err)
+	}
+	return nil
+}
+
 func getSystemdDbusProperty(property string, store any) error {
 	obj, closeConn, err := getDbusObject(systemdResolvedDest, systemdDbusObjectNode)
 	if err != nil {
-		return fmt.Errorf("got error while attempting to retrieve the systemd dns manager object, error: %s", err)
+		return fmt.Errorf("attempting to retrieve the systemd dns manager object, error: %w", err)
 	}
 	defer closeConn()
 
 	v, e := obj.GetProperty(property)
 	if e != nil {
-		return fmt.Errorf("got an error getting property %s: %v", property, e)
+		return fmt.Errorf("getting property %s: %w", property, e)
 	}
 
 	return v.Store(store)
 }
+
+func isSystemdResolvedRunning() bool {
+	return isDbusListenerRunning(systemdResolvedDest, systemdDbusObjectNode)
+}
+
+func isSystemdResolveConfMode() bool {
+	if !isDbusListenerRunning(systemdResolvedDest, systemdDbusObjectNode) {
+		return false
+	}
+
+	var value string
+	if err := getSystemdDbusProperty(systemdDbusResolvConfModeProperty, &value); err != nil {
+		log.Errorf("got an error while checking systemd resolv conf mode, error: %s", err)
+		return false
+	}
+
+	if value == systemdDbusResolvConfModeForeign {
+		return true
+	}
+
+	return false
+}

client/internal/dns/unclean_shutdown_android.go

@@ -0,0 +1,5 @@
+package dns
+
+func CheckUncleanShutdown(string) error {
+	return nil
+}

client/internal/dns/unclean_shutdown_darwin.go

@@ -0,0 +1,59 @@
+//go:build !ios
+
+package dns
+
+import (
+	"errors"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const fileUncleanShutdownFileLocation = "/var/lib/netbird/unclean_shutdown_dns"
+
+func CheckUncleanShutdown(string) error {
+	if _, err := os.Stat(fileUncleanShutdownFileLocation); err != nil {
+		if errors.Is(err, fs.ErrNotExist) {
+			// no file -> clean shutdown
+			return nil
+		} else {
+			return fmt.Errorf("state: %w", err)
+		}
+	}
+
+	log.Warnf("detected unclean shutdown, file %s exists. Restoring unclean shutdown dns settings.", fileUncleanShutdownFileLocation)
+
+	manager, err := newHostManager()
+	if err != nil {
+		return fmt.Errorf("create host manager: %w", err)
+	}
+
+	if err := manager.restoreUncleanShutdownDNS(nil); err != nil {
+		return fmt.Errorf("restore unclean shutdown backup: %w", err)
+	}
+
+	return nil
+}
+
+func createUncleanShutdownIndicator() error {
+	dir := filepath.Dir(fileUncleanShutdownFileLocation)
+	if err := os.MkdirAll(dir, os.FileMode(0755)); err != nil {
+		return fmt.Errorf("create dir %s: %w", dir, err)
+	}
+
+	if err := os.WriteFile(fileUncleanShutdownFileLocation, nil, 0644); err != nil { //nolint:gosec
+		return fmt.Errorf("create %s: %w", fileUncleanShutdownFileLocation, err)
+	}
+
+	return nil
+}
+
+func removeUncleanShutdownIndicator() error {
+	if err := os.Remove(fileUncleanShutdownFileLocation); err != nil && !errors.Is(err, fs.ErrNotExist) {
+		return fmt.Errorf("remove %s: %w", fileUncleanShutdownFileLocation, err)
+	}
+	return nil
+}

client/internal/dns/unclean_shutdown_ios.go

@@ -0,0 +1,5 @@
+package dns
+
+func CheckUncleanShutdown(string) error {
+	return nil
+}

client/internal/dns/unclean_shutdown_unix.go

@@ -0,0 +1,91 @@
+//go:build (linux && !android) || freebsd
+
+package dns
+
+import (
+	"errors"
+	"fmt"
+	"io/fs"
+	"net/netip"
+	"os"
+	"path/filepath"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func CheckUncleanShutdown(wgIface string) error {
+	if _, err := os.Stat(fileUncleanShutdownResolvConfLocation); err != nil {
+		if errors.Is(err, fs.ErrNotExist) {
+			// no file -> clean shutdown
+			return nil
+		} else {
+			return fmt.Errorf("state: %w", err)
+		}
+	}
+
+	log.Warnf("detected unclean shutdown, file %s exists", fileUncleanShutdownResolvConfLocation)
+
+	managerData, err := os.ReadFile(fileUncleanShutdownManagerTypeLocation)
+	if err != nil {
+		return fmt.Errorf("read %s: %w", fileUncleanShutdownManagerTypeLocation, err)
+	}
+
+	managerFields := strings.Split(string(managerData), ",")
+	if len(managerFields) < 2 {
+		return errors.New("split manager data: insufficient number of fields")
+	}
+	osManagerTypeStr, dnsAddressStr := managerFields[0], managerFields[1]
+
+	dnsAddress, err := netip.ParseAddr(dnsAddressStr)
+	if err != nil {
+		return fmt.Errorf("parse dns address %s failed: %w", dnsAddressStr, err)
+	}
+
+	log.Warnf("restoring unclean shutdown dns settings via previously detected manager: %s", osManagerTypeStr)
+
+	// determine os manager type, so we can invoke the respective restore action
+	osManagerType, err := newOsManagerType(osManagerTypeStr)
+	if err != nil {
+		return fmt.Errorf("detect previous host manager: %w", err)
+	}
+
+	manager, err := newHostManagerFromType(wgIface, osManagerType)
+	if err != nil {
+		return fmt.Errorf("create previous host manager: %w", err)
+	}
+
+	if err := manager.restoreUncleanShutdownDNS(&dnsAddress); err != nil {
+		return fmt.Errorf("restore unclean shutdown backup: %w", err)
+	}
+
+	return nil
+}
+
+func createUncleanShutdownIndicator(sourcePath string, managerType osManagerType, dnsAddress string) error {
+	dir := filepath.Dir(fileUncleanShutdownResolvConfLocation)
+	if err := os.MkdirAll(dir, os.FileMode(0755)); err != nil {
+		return fmt.Errorf("create dir %s: %w", dir, err)
+	}
+
+	if err := copyFile(sourcePath, fileUncleanShutdownResolvConfLocation); err != nil {
+		return fmt.Errorf("create %s: %w", sourcePath, err)
+	}
+
+	managerData := fmt.Sprintf("%s,%s", managerType, dnsAddress)
+
+	if err := os.WriteFile(fileUncleanShutdownManagerTypeLocation, []byte(managerData), 0644); err != nil { //nolint:gosec
+		return fmt.Errorf("create %s: %w", fileUncleanShutdownManagerTypeLocation, err)
+	}
+	return nil
+}
+
+func removeUncleanShutdownIndicator() error {
+	if err := os.Remove(fileUncleanShutdownResolvConfLocation); err != nil && !errors.Is(err, fs.ErrNotExist) {
+		return fmt.Errorf("remove %s: %w", fileUncleanShutdownResolvConfLocation, err)
+	}
+	if err := os.Remove(fileUncleanShutdownManagerTypeLocation); err != nil && !errors.Is(err, fs.ErrNotExist) {
+		return fmt.Errorf("remove %s: %w", fileUncleanShutdownManagerTypeLocation, err)
+	}
+	return nil
+}

client/internal/dns/unclean_shutdown_windows.go

@@ -0,0 +1,75 @@
+package dns
+
+import (
+	"errors"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+
+	"github.com/sirupsen/logrus"
+)
+
+const (
+	netbirdProgramDataLocation = "Netbird"
+	fileUncleanShutdownFile    = "unclean_shutdown_dns.txt"
+)
+
+func CheckUncleanShutdown(string) error {
+	file := getUncleanShutdownFile()
+
+	if _, err := os.Stat(file); err != nil {
+		if errors.Is(err, fs.ErrNotExist) {
+			// no file -> clean shutdown
+			return nil
+		} else {
+			return fmt.Errorf("state: %w", err)
+		}
+	}
+
+	logrus.Warnf("detected unclean shutdown, file %s exists. Restoring unclean shutdown dns settings.", file)
+
+	guid, err := os.ReadFile(file)
+	if err != nil {
+		return fmt.Errorf("read %s: %w", file, err)
+	}
+
+	manager, err := newHostManagerWithGuid(string(guid))
+	if err != nil {
+		return fmt.Errorf("create host manager: %w", err)
+	}
+
+	if err := manager.restoreUncleanShutdownDNS(nil); err != nil {
+		return fmt.Errorf("restore unclean shutdown backup: %w", err)
+	}
+
+	return nil
+}
+
+func createUncleanShutdownIndicator(guid string) error {
+	file := getUncleanShutdownFile()
+
+	dir := filepath.Dir(file)
+	if err := os.MkdirAll(dir, os.FileMode(0755)); err != nil {
+		return fmt.Errorf("create dir %s: %w", dir, err)
+	}
+
+	if err := os.WriteFile(file, []byte(guid), 0600); err != nil {
+		return fmt.Errorf("create %s: %w", file, err)
+	}
+
+	return nil
+}
+
+func removeUncleanShutdownIndicator() error {
+	file := getUncleanShutdownFile()
+
+	if err := os.Remove(file); err != nil && !errors.Is(err, fs.ErrNotExist) {
+		return fmt.Errorf("remove %s: %w", file, err)
+	}
+	return nil
+}
+
+func getUncleanShutdownFile() string {
+	return filepath.Join(os.Getenv("PROGRAMDATA"), netbirdProgramDataLocation, fileUncleanShutdownFile)
+}

client/internal/dns/upstream.go

@@ -5,14 +5,16 @@ import (
 	"errors"
 	"fmt"
 	"net"
-	"runtime"
 	"sync"
 	"sync/atomic"
 	"time"
 
 	"github.com/cenkalti/backoff/v4"
+	"github.com/hashicorp/go-multierror"
 	"github.com/miekg/dns"
 	log "github.com/sirupsen/logrus"
+
+	"github.com/netbirdio/netbird/client/internal/peer"
 )
 
 const (
@@ -22,11 +24,10 @@ const (
 	probeTimeout     = 2 * time.Second
 )
 
-const testRecord = "."
+const testRecord = "com."
 
 type upstreamClient interface {
-	exchange(upstream string, r *dns.Msg) (*dns.Msg, time.Duration, error)
-	exchangeContext(ctx context.Context, upstream string, r *dns.Msg) (*dns.Msg, time.Duration, error)
+	exchange(ctx context.Context, upstream string, r *dns.Msg) (*dns.Msg, time.Duration, error)
 }
 
 type UpstreamResolver interface {
@@ -41,17 +42,19 @@ type upstreamResolverBase struct {
 	upstreamServers  []string
 	disabled         bool
 	failsCount       atomic.Int32
+	successCount     atomic.Int32
 	failsTillDeact   int32
 	mutex            sync.Mutex
 	reactivatePeriod time.Duration
 	upstreamTimeout  time.Duration
 
-	deactivate func()
-	reactivate func()
+	deactivate     func(error)
+	reactivate     func()
+	statusRecorder *peer.Status
 }
 
-func newUpstreamResolverBase(parentCTX context.Context) *upstreamResolverBase {
-	ctx, cancel := context.WithCancel(parentCTX)
+func newUpstreamResolverBase(ctx context.Context, statusRecorder *peer.Status) *upstreamResolverBase {
+	ctx, cancel := context.WithCancel(ctx)
 
 	return &upstreamResolverBase{
 		ctx:              ctx,
@@ -59,6 +62,7 @@ func newUpstreamResolverBase(parentCTX context.Context) *upstreamResolverBase {
 		upstreamTimeout:  upstreamTimeout,
 		reactivatePeriod: reactivatePeriod,
 		failsTillDeact:   failsTillDeact,
+		statusRecorder:   statusRecorder,
 	}
 }
 
@@ -69,9 +73,17 @@ func (u *upstreamResolverBase) stop() {
 
 // ServeDNS handles a DNS request
 func (u *upstreamResolverBase) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
-	defer u.checkUpstreamFails()
+	var err error
+	defer func() {
+		u.checkUpstreamFails(err)
+	}()
 
 	log.WithField("question", r.Question[0]).Trace("received an upstream question")
+	// set the AuthenticatedData flag and the EDNS0 buffer size to 4096 bytes to support larger dns records
+	if r.Extra == nil {
+		r.SetEdns0(4096, false)
+		r.MsgHdr.AuthenticatedData = true
+	}
 
 	select {
 	case <-u.ctx.Done():
@@ -80,8 +92,14 @@ func (u *upstreamResolverBase) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 	}
 
 	for _, upstream := range u.upstreamServers {
+		var rm *dns.Msg
+		var t time.Duration
 
-		rm, t, err := u.upstreamClient.exchange(upstream, r)
+		func() {
+			ctx, cancel := context.WithTimeout(u.ctx, u.upstreamTimeout)
+			defer cancel()
+			rm, t, err = u.upstreamClient.exchange(ctx, upstream, r)
+		}()
 
 		if err != nil {
 			if errors.Is(err, context.DeadlineExceeded) || isTimeout(err) {
@@ -107,6 +125,7 @@ func (u *upstreamResolverBase) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 			return
 		}
 
+		u.successCount.Add(1)
 		log.Tracef("took %s to query the upstream %s", t, upstream)
 
 		err = w.WriteMsg(rm)
@@ -126,7 +145,7 @@ func (u *upstreamResolverBase) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 // If fails count is greater that failsTillDeact, upstream resolving
 // will be disabled for reactivatePeriod, after that time period fails counter
 // will be reset and upstream will be reactivated.
-func (u *upstreamResolverBase) checkUpstreamFails() {
+func (u *upstreamResolverBase) checkUpstreamFails(err error) {
 	u.mutex.Lock()
 	defer u.mutex.Unlock()
 
@@ -140,7 +159,7 @@ func (u *upstreamResolverBase) checkUpstreamFails() {
 	default:
 	}
 
-	u.disable()
+	u.disable(err)
 }
 
 // probeAvailability tests all upstream servers simultaneously and
@@ -155,17 +174,25 @@ func (u *upstreamResolverBase) probeAvailability() {
 	default:
 	}
 
+	// avoid probe if upstreams could resolve at least one query and fails count is less than failsTillDeact
+	if u.successCount.Load() > 0 && u.failsCount.Load() < u.failsTillDeact {
+		return
+	}
+
 	var success bool
 	var mu sync.Mutex
 	var wg sync.WaitGroup
 
+	var errors *multierror.Error
 	for _, upstream := range u.upstreamServers {
 		upstream := upstream
 
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
-			if err := u.testNameserver(upstream); err != nil {
+			err := u.testNameserver(upstream, 500*time.Millisecond)
+			if err != nil {
+				errors = multierror.Append(errors, err)
 				log.Warnf("probing upstream nameserver %s: %s", upstream, err)
 				return
 			}
@@ -180,7 +207,7 @@ func (u *upstreamResolverBase) probeAvailability() {
 
 	// didn't find a working upstream server, let's disable and try later
 	if !success {
-		u.disable()
+		u.disable(errors.ErrorOrNil())
 	}
 }
 
@@ -204,7 +231,7 @@ func (u *upstreamResolverBase) waitUntilResponse() {
 		}
 
 		for _, upstream := range u.upstreamServers {
-			if err := u.testNameserver(upstream); err != nil {
+			if err := u.testNameserver(upstream, probeTimeout); err != nil {
 				log.Tracef("upstream check for %s: %s", upstream, err)
 			} else {
 				// at least one upstream server is available, stop probing
@@ -213,7 +240,7 @@ func (u *upstreamResolverBase) waitUntilResponse() {
 		}
 
 		log.Tracef("checking connectivity with upstreams %s failed. Retrying in %s", u.upstreamServers, exponentialBackOff.NextBackOff())
-		return fmt.Errorf("got an error from upstream check call")
+		return fmt.Errorf("upstream check call error")
 	}
 
 	err := backoff.Retry(operation, exponentialBackOff)
@@ -224,6 +251,7 @@ func (u *upstreamResolverBase) waitUntilResponse() {
 
 	log.Infof("upstreams %s are responsive again. Adding them back to system", u.upstreamServers)
 	u.failsCount.Store(0)
+	u.successCount.Add(1)
 	u.reactivate()
 	u.disabled = false
 }
@@ -239,26 +267,24 @@ func isTimeout(err error) bool {
 	return false
 }
 
-func (u *upstreamResolverBase) disable() {
+func (u *upstreamResolverBase) disable(err error) {
 	if u.disabled {
 		return
 	}
 
-	// todo test the deactivation logic, it seems to affect the client
-	if runtime.GOOS != "ios" {
-		log.Warnf("upstream resolving is Disabled for %v", reactivatePeriod)
-		u.deactivate()
-		u.disabled = true
-		go u.waitUntilResponse()
-	}
+	log.Warnf("Upstream resolving is Disabled for %v", reactivatePeriod)
+	u.successCount.Store(0)
+	u.deactivate(err)
+	u.disabled = true
+	go u.waitUntilResponse()
 }
 
-func (u *upstreamResolverBase) testNameserver(server string) error {
-	ctx, cancel := context.WithTimeout(u.ctx, probeTimeout)
+func (u *upstreamResolverBase) testNameserver(server string, timeout time.Duration) error {
+	ctx, cancel := context.WithTimeout(u.ctx, timeout)
 	defer cancel()
 
 	r := new(dns.Msg).SetQuestion(testRecord, dns.TypeSOA)
 
-	_, _, err := u.upstreamClient.exchangeContext(ctx, server, r)
+	_, _, err := u.upstreamClient.exchange(ctx, server, r)
 	return err
 }

client/internal/dns/upstream_android.go

@@ -0,0 +1,84 @@
+package dns
+
+import (
+	"context"
+	"net"
+	"syscall"
+	"time"
+
+	"github.com/miekg/dns"
+
+	"github.com/netbirdio/netbird/client/internal/peer"
+	nbnet "github.com/netbirdio/netbird/util/net"
+)
+
+type upstreamResolver struct {
+	*upstreamResolverBase
+	hostsDNSHolder *hostsDNSHolder
+}
+
+// newUpstreamResolver in Android we need to distinguish the DNS servers to available through VPN or outside of VPN
+// In case if the assigned DNS address is available only in the protected network then the resolver will time out at the
+// first time, and we need to wait for a while to start to use again the proper DNS resolver.
+func newUpstreamResolver(
+	ctx context.Context,
+	_ string,
+	_ net.IP,
+	_ *net.IPNet,
+	statusRecorder *peer.Status,
+	hostsDNSHolder *hostsDNSHolder,
+) (*upstreamResolver, error) {
+	upstreamResolverBase := newUpstreamResolverBase(ctx, statusRecorder)
+	c := &upstreamResolver{
+		upstreamResolverBase: upstreamResolverBase,
+		hostsDNSHolder:       hostsDNSHolder,
+	}
+	upstreamResolverBase.upstreamClient = c
+	return c, nil
+}
+
+// exchange in case of Android if the upstream is a local resolver then we do not need to mark the socket as protected.
+// In other case the DNS resolvation goes through the VPN, so we need to force to use the
+func (u *upstreamResolver) exchange(ctx context.Context, upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
+	if u.isLocalResolver(upstream) {
+		return u.exchangeWithoutVPN(ctx, upstream, r)
+	} else {
+		return u.exchangeWithinVPN(ctx, upstream, r)
+	}
+}
+
+func (u *upstreamResolver) exchangeWithinVPN(ctx context.Context, upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
+	upstreamExchangeClient := &dns.Client{}
+	return upstreamExchangeClient.ExchangeContext(ctx, r, upstream)
+}
+
+// exchangeWithoutVPN protect the UDP socket by Android SDK to avoid to goes through the VPN
+func (u *upstreamResolver) exchangeWithoutVPN(ctx context.Context, upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
+	timeout := upstreamTimeout
+	if deadline, ok := ctx.Deadline(); ok {
+		timeout = time.Until(deadline)
+	}
+	dialTimeout := timeout
+
+	nbDialer := nbnet.NewDialer()
+
+	dialer := &net.Dialer{
+		Control: func(network, address string, c syscall.RawConn) error {
+			return nbDialer.Control(network, address, c)
+		},
+		Timeout: dialTimeout,
+	}
+
+	upstreamExchangeClient := &dns.Client{
+		Dialer: dialer,
+	}
+
+	return upstreamExchangeClient.Exchange(r, upstream)
+}
+
+func (u *upstreamResolver) isLocalResolver(upstream string) bool {
+	if u.hostsDNSHolder.isContain(upstream) {
+		return true
+	}
+	return false
+}

client/internal/dns/upstream_general.go

@@ -0,0 +1,38 @@
+//go:build !android && !ios
+
+package dns
+
+import (
+	"context"
+	"net"
+	"time"
+
+	"github.com/miekg/dns"
+
+	"github.com/netbirdio/netbird/client/internal/peer"
+)
+
+type upstreamResolver struct {
+	*upstreamResolverBase
+}
+
+func newUpstreamResolver(
+	ctx context.Context,
+	_ string,
+	_ net.IP,
+	_ *net.IPNet,
+	statusRecorder *peer.Status,
+	_ *hostsDNSHolder,
+) (*upstreamResolver, error) {
+	upstreamResolverBase := newUpstreamResolverBase(ctx, statusRecorder)
+	nonIOS := &upstreamResolver{
+		upstreamResolverBase: upstreamResolverBase,
+	}
+	upstreamResolverBase.upstreamClient = nonIOS
+	return nonIOS, nil
+}
+
+func (u *upstreamResolver) exchange(ctx context.Context, upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
+	upstreamExchangeClient := &dns.Client{}
+	return upstreamExchangeClient.ExchangeContext(ctx, r, upstream)
+}

client/internal/dns/upstream_ios.go

@@ -4,6 +4,7 @@ package dns
 
 import (
 	"context"
+	"fmt"
 	"net"
 	"syscall"
 	"time"
@@ -11,67 +12,83 @@ import (
 	"github.com/miekg/dns"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/sys/unix"
+
+	"github.com/netbirdio/netbird/client/internal/peer"
 )
 
 type upstreamResolverIOS struct {
 	*upstreamResolverBase
-	lIP    net.IP
-	lNet   *net.IPNet
-	iIndex int
+	lIP           net.IP
+	lNet          *net.IPNet
+	interfaceName string
 }
 
-func newUpstreamResolver(parentCTX context.Context, interfaceName string, ip net.IP, net *net.IPNet) (*upstreamResolverIOS, error) {
-	upstreamResolverBase := newUpstreamResolverBase(parentCTX)
-
-	index, err := getInterfaceIndex(interfaceName)
-	if err != nil {
-		log.Debugf("unable to get interface index for %s: %s", interfaceName, err)
-		return nil, err
-	}
+func newUpstreamResolver(
+	ctx context.Context,
+	interfaceName string,
+	ip net.IP,
+	net *net.IPNet,
+	statusRecorder *peer.Status,
+	_ *hostsDNSHolder,
+) (*upstreamResolverIOS, error) {
+	upstreamResolverBase := newUpstreamResolverBase(ctx, statusRecorder)
 
 	ios := &upstreamResolverIOS{
 		upstreamResolverBase: upstreamResolverBase,
 		lIP:                  ip,
 		lNet:                 net,
-		iIndex:               index,
+		interfaceName:        interfaceName,
 	}
 	ios.upstreamClient = ios
 
 	return ios, nil
 }
 
-func (u *upstreamResolverIOS) exchange(upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
-	return u.exchangeContext(context.Background(), upstream, r)
-}
-
-func (u *upstreamResolverIOS) exchangeContext(ctx context.Context, upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
+func (u *upstreamResolverIOS) exchange(ctx context.Context, upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
 	client := &dns.Client{}
 	upstreamHost, _, err := net.SplitHostPort(upstream)
 	if err != nil {
-		log.Errorf("error while parsing upstream host: %s", err)
+		return nil, 0, fmt.Errorf("error while parsing upstream host: %s", err)
 	}
+
+	timeout := upstreamTimeout
+	if deadline, ok := ctx.Deadline(); ok {
+		timeout = time.Until(deadline)
+	}
+	client.DialTimeout = timeout
+
 	upstreamIP := net.ParseIP(upstreamHost)
 	if u.lNet.Contains(upstreamIP) || net.IP.IsPrivate(upstreamIP) {
 		log.Debugf("using private client to query upstream: %s", upstream)
-		client = u.getClientPrivate()
+		client, err = GetClientPrivate(u.lIP, u.interfaceName, timeout)
+		if err != nil {
+			return nil, 0, fmt.Errorf("error while creating private client: %s", err)
+		}
 	}
 
-	return client.ExchangeContext(ctx, r, upstream)
+	// Cannot use client.ExchangeContext because it overwrites our Dialer
+	return client.Exchange(r, upstream)
 }
 
-// getClientPrivate returns a new DNS client bound to the local IP address of the Netbird interface
+// GetClientPrivate returns a new DNS client bound to the local IP address of the Netbird interface
 // This method is needed for iOS
-func (u *upstreamResolverIOS) getClientPrivate() *dns.Client {
+func GetClientPrivate(ip net.IP, interfaceName string, dialTimeout time.Duration) (*dns.Client, error) {
+	index, err := getInterfaceIndex(interfaceName)
+	if err != nil {
+		log.Debugf("unable to get interface index for %s: %s", interfaceName, err)
+		return nil, err
+	}
+
 	dialer := &net.Dialer{
 		LocalAddr: &net.UDPAddr{
-			IP:   u.lIP,
+			IP:   ip,
 			Port: 0, // Let the OS pick a free port
 		},
-		Timeout: upstreamTimeout,
+		Timeout: dialTimeout,
 		Control: func(network, address string, c syscall.RawConn) error {
 			var operr error
 			fn := func(s uintptr) {
-				operr = unix.SetsockoptInt(int(s), unix.IPPROTO_IP, unix.IP_BOUND_IF, u.iIndex)
+				operr = unix.SetsockoptInt(int(s), unix.IPPROTO_IP, unix.IP_BOUND_IF, index)
 			}
 
 			if err := c.Control(fn); err != nil {
@@ -88,7 +105,7 @@ func (u *upstreamResolverIOS) getClientPrivate() *dns.Client {
 	client := &dns.Client{
 		Dialer: dialer,
 	}
-	return client
+	return client, nil
 }
 
 func getInterfaceIndex(interfaceName string) (int, error) {

client/internal/dns/upstream_nonios.go

@@ -1,36 +0,0 @@
-//go:build !ios
-
-package dns
-
-import (
-	"context"
-	"net"
-	"time"
-
-	"github.com/miekg/dns"
-)
-
-type upstreamResolverNonIOS struct {
-	*upstreamResolverBase
-}
-
-func newUpstreamResolver(parentCTX context.Context, interfaceName string, ip net.IP, net *net.IPNet) (*upstreamResolverNonIOS, error) {
-	upstreamResolverBase := newUpstreamResolverBase(parentCTX)
-	nonIOS := &upstreamResolverNonIOS{
-		upstreamResolverBase: upstreamResolverBase,
-	}
-	upstreamResolverBase.upstreamClient = nonIOS
-	return nonIOS, nil
-}
-
-func (u *upstreamResolverNonIOS) exchange(upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
-	// default upstream timeout
-	ctx, cancel := context.WithTimeout(u.ctx, u.upstreamTimeout)
-	defer cancel()
-	return u.exchangeContext(ctx, upstream, r)
-}
-
-func (u *upstreamResolverNonIOS) exchangeContext(ctx context.Context, upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
-	upstreamExchangeClient := &dns.Client{}
-	return upstreamExchangeClient.ExchangeContext(ctx, r, upstream)
-}

client/internal/dns/upstream_test.go

@@ -58,7 +58,7 @@ func TestUpstreamResolver_ServeDNS(t *testing.T) {
 	for _, testCase := range testCases {
 		t.Run(testCase.name, func(t *testing.T) {
 			ctx, cancel := context.WithCancel(context.TODO())
-			resolver, _ := newUpstreamResolver(ctx, "", net.IP{}, &net.IPNet{})
+			resolver, _ := newUpstreamResolver(ctx, "", net.IP{}, &net.IPNet{}, nil, nil)
 			resolver.upstreamServers = testCase.InputServers
 			resolver.upstreamTimeout = testCase.timeout
 			if testCase.cancelCTX {
@@ -105,13 +105,8 @@ type mockUpstreamResolver struct {
 	err error
 }
 
-// Exchange mock implementation of Exchangefrom upstreamResolver
-func (c mockUpstreamResolver) exchange(upstream string, r *dns.Msg) (*dns.Msg, time.Duration, error) {
-	return c.exchangeContext(context.Background(), upstream, r)
-}
-
-// ExchangeContext mock implementation of ExchangeContext from upstreamResolver
-func (c mockUpstreamResolver) exchangeContext(_ context.Context, _ string, _ *dns.Msg) (*dns.Msg, time.Duration, error) {
+// exchange mock implementation of exchange from upstreamResolver
+func (c mockUpstreamResolver) exchange(_ context.Context, _ string, _ *dns.Msg) (*dns.Msg, time.Duration, error) {
 	return c.r, c.rtt, c.err
 }
 
@@ -136,7 +131,7 @@ func TestUpstreamResolver_DeactivationReactivation(t *testing.T) {
 	}
 
 	failed := false
-	resolver.deactivate = func() {
+	resolver.deactivate = func(error) {
 		failed = true
 	}
 

client/internal/dns/wgiface.go

@@ -2,12 +2,17 @@
 
 package dns
 
-import "github.com/netbirdio/netbird/iface"
+import (
+	"net"
+
+	"github.com/netbirdio/netbird/iface"
+)
 
 // WGIface defines subset methods of interface required for manager
 type WGIface interface {
 	Name() string
 	Address() iface.WGAddress
+	ToInterface() *net.Interface
 	IsUserspaceBind() bool
 	GetFilter() iface.PacketFilter
 	GetDevice() *iface.DeviceWrapper

client/internal/ebpf/ebpf/dns_fwd_linux.go

@@ -13,7 +13,7 @@ const (
 )
 
 func (tf *GeneralManager) LoadDNSFwd(ip string, dnsPort int) error {
-	log.Debugf("load ebpf DNS forwarder: address: %s:%d", ip, dnsPort)
+	log.Debugf("load eBPF DNS forwarder, watching addr: %s:53, redirect to port: %d", ip, dnsPort)
 	tf.lock.Lock()
 	defer tf.lock.Unlock()
 

client/internal/ebpf/ebpf/src/readme.md

@@ -1,5 +1,10 @@
-# Debug
+# DNS forwarder
 
+The agent attach the XDP program to the lo device. We can not use fake address in eBPF because the
+traffic does not appear in the eBPF program. The program capture the traffic on wg_ip:53 and 
+overwrite in it the destination port to 5053.
+
+# Debug
 
 The CONFIG_BPF_EVENTS kernel module is required for bpf_printk.
 Apply this code to use bpf_printk