use correct serializer

Send notification through terminal on user session expiration in Linux and macOS, 
unless UI application is installed to handle it instead.

.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 +20,25 @@ Steps to reproduce the behavior:
 4. See error
 
 **Expected behavior**
+
 A clear and concise description of what you expected to happen.
 
+**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 -d output:**
-If applicable, add the output of the `netbird status -d` command
+
+If applicable, add the `netbird status -d' command output.
 
 **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

@@ -35,5 +35,8 @@ jobs:
       - 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-linux.yml

@@ -41,8 +41,11 @@ jobs:
       - 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
@@ -69,6 +72,9 @@ jobs:
       - 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/
 

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

@@ -44,6 +44,7 @@ jobs:
 
       - run: PsExec64 -s -w ${{ github.workspace }} C:\hostedtoolcache\windows\go\${{ steps.go.outputs.go-version }}\x64\bin\go.exe env -w GOMODCACHE=C:\Users\runneradmin\go\pkg\mod
       - 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
+      - run: "[Environment]::SetEnvironmentVariable('NETBIRD_STORE_ENGINE', 'jsonfile', 'Machine')"
 
       - 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"

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

@@ -1,4 +1,4 @@
-name: Android build validation
+name: Mobile build validation
 
 on:
   push:
@@ -11,7 +11,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build:
+  andrloid_build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
@@ -46,3 +46,20 @@ jobs:
         env:
           CGO_ENABLED: 0
           ANDROID_NDK_HOME: /usr/local/lib/android/sdk/ndk/23.1.7779620
+  ios_build:
+    runs-on: macos-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: "1.21.x"
+      - name: install gomobile
+        run: go install golang.org/x/mobile/cmd/gomobile@v0.0.0-20230531173138-3c911d8e3eda
+      - 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
+        env:
+          CGO_ENABLED: 0

.github/workflows/release.yml

@@ -190,6 +190,9 @@ jobs:
       -
         name: Install modules
         run: go mod tidy
+      - 
+        name: check git status
+        run: git --no-pager diff --exit-code
       -
         name: Run GoReleaser
         id: goreleaser

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

@@ -127,6 +127,9 @@ jobs:
       - 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
@@ -159,6 +162,13 @@ jobs:
           test $count -eq 4
         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.mmdb
+          docker compose exec management ls -l /var/lib/netbird/ | grep -i geonames.db
+
   test-getting-started-script:
     runs-on: ubuntu-latest
     steps:
@@ -186,3 +196,16 @@ jobs:
         run: test -f zitadel.env
       - name: test dashboard.env file gen
         run: test -f dashboard.env
+  test-download-geolite2-script:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install jq
+        run: sudo apt-get update && sudo apt-get install -y unzip sqlite3
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: test script
+        run: bash -x infrastructure_files/download-geolite2.sh
+      - name: test mmdb file exists
+        run: test -f GeoLite2-City.mmdb
+      - name: test geonames file exists
+        run: test -f geonames.db

.gitignore

@@ -29,4 +29,4 @@ infrastructure_files/setup.env
 infrastructure_files/setup-*.env
 .vscode
 .DS_Store
-*.db
+GeoLite2-City*

.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

.goreleaser_ui.yaml

@@ -54,7 +54,7 @@ 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 +71,7 @@ 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

CONTRIBUTING.md

@@ -274,6 +274,8 @@ go test -exec sudo ./...
 ```
 > On Windows use a powershell with administrator privileges
 
+> Non-GTK environments will need the `libayatana-appindicator3-dev` (debian/ubuntu) package installed
+
 ## Checklist before submitting a PR
 As a critical network service and open-source project, we must enforce a few things before submitting the pull-requests:
 - Keep functions as simple as possible, with a single purpose

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>
@@ -42,25 +42,22 @@
 
 **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
 
-https://user-images.githubusercontent.com/700848/197345890-2e2cded5-7b7a-436f-a444-94e80dd24f46.mov
+![download (2)](https://github.com/netbirdio/netbird/assets/700848/16210ac2-7265-44c1-8d4e-8fae85534dac)
 
 ### 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)
@@ -109,8 +106,8 @@ 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).

client/android/client.go

@@ -79,6 +79,7 @@ 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
@@ -109,6 +110,7 @@ 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
@@ -139,6 +141,11 @@ 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/cmd/login.go

@@ -82,12 +82,15 @@ var loginCmd = &cobra.Command{
 
 		loginRequest := proto.LoginRequest{
 			SetupKey:             setupKey,
-			PreSharedKey:         preSharedKey,
 			ManagementUrl:        managementURL,
 			IsLinuxDesktopClient: isLinuxRunningDesktop(),
 			Hostname:             hostName,
 		}
 
+		if rootCmd.PersistentFlags().Changed(preSharedKeyFlag) {
+			loginRequest.OptionalPreSharedKey = &preSharedKey
+		}
+
 		var loginErr error
 
 		var loginResp *proto.LoginResponse

client/cmd/root.go

@@ -25,12 +25,15 @@ 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"
+	disableAutoConnectFlag  = "disable-auto-connect"
+	serverSSHAllowedFlag    = "allow-server-ssh"
 )
 
 var (
@@ -54,8 +57,11 @@ var (
 	natExternalIPs          []string
 	customDNSAddress        string
 	rosenpassEnabled        bool
+	rosenpassPermissive     bool
+	serverSSHAllowed        bool
 	interfaceName           string
 	wireguardPort           uint16
+	autoConnectDisabled     bool
 	rootCmd                 = &cobra.Command{
 		Use:          "netbird",
 		Short:        "",
@@ -126,6 +132,9 @@ 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.")
 }
 
 // SetupCloseHandler handles SIGTERM signal and exits with success
@@ -176,7 +185,7 @@ 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()

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 {
@@ -109,7 +110,6 @@ var runCmd = &cobra.Command{
 		if err != nil {
 			return err
 		}
-		cmd.Printf("Netbird service is running")
 		return nil
 	},
 }

client/cmd/service_installer.go

@@ -77,6 +77,7 @@ var installCmd = &cobra.Command{
 			cmd.PrintErrln(err)
 			return err
 		}
+
 		cmd.Println("Netbird service has been installed")
 		return nil
 	},
@@ -106,7 +107,7 @@ 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/status.go

@@ -22,14 +22,19 @@ import (
 )
 
 type peerStateDetailOutput struct {
-	FQDN             string           `json:"fqdn" yaml:"fqdn"`
-	IP               string           `json:"netbirdIp" yaml:"netbirdIp"`
-	PubKey           string           `json:"publicKey" yaml:"publicKey"`
-	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"`
+	FQDN                   string           `json:"fqdn" yaml:"fqdn"`
+	IP                     string           `json:"netbirdIp" yaml:"netbirdIp"`
+	PubKey                 string           `json:"publicKey" yaml:"publicKey"`
+	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"`
+	LastWireguardHandshake time.Time        `json:"lastWireguardHandshake" yaml:"lastWireguardHandshake"`
+	TransferReceived       int64            `json:"transferReceived" yaml:"transferReceived"`
+	TransferSent           int64            `json:"transferSent" yaml:"transferSent"`
+	RosenpassEnabled       bool             `json:"quantumResistance" yaml:"quantumResistance"`
 }
 
 type peersStateOutput struct {
@@ -41,11 +46,25 @@ type peersStateOutput struct {
 type signalStateOutput struct {
 	URL       string `json:"url" yaml:"url"`
 	Connected bool   `json:"connected" yaml:"connected"`
+	Error     string `json:"error" yaml:"error"`
 }
 
 type managementStateOutput struct {
 	URL       string `json:"url" yaml:"url"`
 	Connected bool   `json:"connected" yaml:"connected"`
+	Error     string `json:"error" yaml:"error"`
+}
+
+type relayStateOutputDetail struct {
+	URI       string `json:"uri" yaml:"uri"`
+	Available bool   `json:"available" yaml:"available"`
+	Error     string `json:"error" yaml:"error"`
+}
+
+type relayStateOutput struct {
+	Total     int                      `json:"total" yaml:"total"`
+	Available int                      `json:"available" yaml:"available"`
+	Details   []relayStateOutputDetail `json:"details" yaml:"details"`
 }
 
 type iceCandidateType struct {
@@ -54,15 +73,18 @@ type iceCandidateType struct {
 }
 
 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"`
-	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"`
 }
 
 var (
@@ -146,7 +168,7 @@ func statusFunc(cmd *cobra.Command, args []string) error {
 	case yamlFlag:
 		statusOutputString, err = parseToYAML(outputInformationHolder)
 	default:
-		statusOutputString = parseGeneralSummary(outputInformationHolder, false)
+		statusOutputString = parseGeneralSummary(outputInformationHolder, false, false)
 	}
 
 	if err != nil {
@@ -220,37 +242,74 @@ func convertToStatusOutputOverview(resp *proto.StatusResponse) statusOutputOverv
 	managementOverview := managementStateOutput{
 		URL:       managementState.GetURL(),
 		Connected: managementState.GetConnected(),
+		Error:     managementState.Error,
 	}
 
 	signalState := pbFullStatus.GetSignalState()
 	signalOverview := signalStateOutput{
 		URL:       signalState.GetURL(),
 		Connected: signalState.GetConnected(),
+		Error:     signalState.Error,
 	}
 
+	relayOverview := mapRelays(pbFullStatus.GetRelays())
 	peersOverview := mapPeers(resp.GetFullStatus().GetPeers())
 
 	overview := statusOutputOverview{
-		Peers:           peersOverview,
-		CliVersion:      version.NetbirdVersion(),
-		DaemonVersion:   resp.GetDaemonVersion(),
-		ManagementState: managementOverview,
-		SignalState:     signalOverview,
-		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(),
 	}
 
 	return overview
 }
 
+func mapRelays(relays []*proto.RelayState) relayStateOutput {
+	var relayStateDetail []relayStateOutputDetail
+
+	var relaysAvailable int
+	for _, relay := range relays {
+		available := relay.GetAvailable()
+		relayStateDetail = append(relayStateDetail,
+			relayStateOutputDetail{
+				URI:       relay.URI,
+				Available: available,
+				Error:     relay.GetError(),
+			},
+		)
+
+		if available {
+			relaysAvailable++
+		}
+	}
+
+	return relayStateOutput{
+		Total:     len(relays),
+		Available: relaysAvailable,
+		Details:   relayStateDetail,
+	}
+}
+
 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 {
 		isPeerConnected := pbPeerState.ConnStatus == peer.StatusConnected.String()
 		if skipDetailByFilters(pbPeerState, isPeerConnected) {
@@ -261,10 +320,15 @@ func mapPeers(peers []*proto.PeerState) peersStateOutput {
 
 			localICE = pbPeerState.GetLocalIceCandidateType()
 			remoteICE = pbPeerState.GetRemoteIceCandidateType()
+			localICEEndpoint = pbPeerState.GetLocalIceCandidateEndpoint()
+			remoteICEEndpoint = pbPeerState.GetRemoteIceCandidateEndpoint()
 			connType = "P2P"
 			if pbPeerState.Relayed {
 				connType = "Relayed"
 			}
+			lastHandshake = pbPeerState.GetLastWireguardHandshake().AsTime().Local()
+			transferReceived = pbPeerState.GetBytesRx()
+			transferSent = pbPeerState.GetBytesTx()
 		}
 
 		timeLocal := pbPeerState.GetConnStatusUpdate().AsTime().Local()
@@ -279,7 +343,15 @@ func mapPeers(peers []*proto.PeerState) peersStateOutput {
 				Local:  localICE,
 				Remote: remoteICE,
 			},
-			FQDN: pbPeerState.GetFqdn(),
+			IceCandidateEndpoint: iceCandidateType{
+				Local:  localICEEndpoint,
+				Remote: remoteICEEndpoint,
+			},
+			FQDN:                   pbPeerState.GetFqdn(),
+			LastWireguardHandshake: lastHandshake,
+			TransferReceived:       transferReceived,
+			TransferSent:           transferSent,
+			RosenpassEnabled:       pbPeerState.GetRosenpassEnabled(),
 		}
 
 		peersStateDetail = append(peersStateDetail, peerState)
@@ -329,22 +401,32 @@ func parseToYAML(overview statusOutputOverview) (string, error) {
 	return string(yamlBytes), nil
 }
 
-func parseGeneralSummary(overview statusOutputOverview, showURL bool) string {
+func parseGeneralSummary(overview statusOutputOverview, showURL bool, showRelays bool) string {
 
-	managementConnString := "Disconnected"
+	var managementConnString string
 	if overview.ManagementState.Connected {
 		managementConnString = "Connected"
 		if showURL {
 			managementConnString = fmt.Sprintf("%s to %s", managementConnString, overview.ManagementState.URL)
 		}
+	} else {
+		managementConnString = "Disconnected"
+		if overview.ManagementState.Error != "" {
+			managementConnString = fmt.Sprintf("%s, reason: %s", managementConnString, overview.ManagementState.Error)
+		}
 	}
 
-	signalConnString := "Disconnected"
+	var signalConnString string
 	if overview.SignalState.Connected {
 		signalConnString = "Connected"
 		if showURL {
 			signalConnString = fmt.Sprintf("%s to %s", signalConnString, overview.SignalState.URL)
 		}
+	} else {
+		signalConnString = "Disconnected"
+		if overview.SignalState.Error != "" {
+			signalConnString = fmt.Sprintf("%s, reason: %s", signalConnString, overview.SignalState.Error)
+		}
 	}
 
 	interfaceTypeString := "Userspace"
@@ -356,32 +438,61 @@ func parseGeneralSummary(overview statusOutputOverview, showURL bool) string {
 		interfaceIP = "N/A"
 	}
 
+	var relayAvailableString string
+	if showRelays {
+		for _, relay := range overview.Relays.Details {
+			available := "Available"
+			reason := ""
+			if !relay.Available {
+				available = "Unavailable"
+				reason = fmt.Sprintf(", reason: %s", relay.Error)
+			}
+			relayAvailableString += fmt.Sprintf("\n  [%s] is %s%s", relay.URI, available, reason)
+
+		}
+	} else {
+
+		relayAvailableString = fmt.Sprintf("%d/%d Available", overview.Relays.Available, overview.Relays.Total)
+	}
+
 	peersCountString := fmt.Sprintf("%d/%d Connected", overview.Peers.Connected, overview.Peers.Total)
 
+	rosenpassEnabledStatus := "false"
+	if overview.RosenpassEnabled {
+		rosenpassEnabledStatus = "true"
+		if overview.RosenpassPermissive {
+			rosenpassEnabledStatus = "true (permissive)" //nolint:gosec
+		}
+	}
+
 	summary := fmt.Sprintf(
 		"Daemon version: %s\n"+
 			"CLI version: %s\n"+
 			"Management: %s\n"+
 			"Signal: %s\n"+
+			"Relays: %s\n"+
 			"FQDN: %s\n"+
 			"NetBird IP: %s\n"+
 			"Interface type: %s\n"+
+			"Quantum resistance: %s\n"+
 			"Peers count: %s\n",
 		overview.DaemonVersion,
 		version.NetbirdVersion(),
 		managementConnString,
 		signalConnString,
+		relayAvailableString,
 		overview.FQDN,
 		interfaceIP,
 		interfaceTypeString,
+		rosenpassEnabledStatus,
 		peersCountString,
 	)
 	return summary
 }
 
 func parseToFullDetailSummary(overview statusOutputOverview) string {
-	parsedPeersString := parsePeers(overview.Peers)
-	summary := parseGeneralSummary(overview, true)
+	parsedPeersString := parsePeers(overview.Peers, overview.RosenpassEnabled, overview.RosenpassPermissive)
+	summary := parseGeneralSummary(overview, true, true)
 
 	return fmt.Sprintf(
 		"Peers detail:"+
@@ -392,7 +503,7 @@ func parseToFullDetailSummary(overview statusOutputOverview) string {
 	)
 }
 
-func parsePeers(peers peersStateOutput) string {
+func parsePeers(peers peersStateOutput, rosenpassEnabled, rosenpassPermissive bool) string {
 	var (
 		peersString = ""
 	)
@@ -409,6 +520,42 @@ func parsePeers(peers peersStateOutput) string {
 			remoteICE = peerState.IceCandidateType.Remote
 		}
 
+		localICEEndpoint := "-"
+		if peerState.IceCandidateEndpoint.Local != "" {
+			localICEEndpoint = peerState.IceCandidateEndpoint.Local
+		}
+
+		remoteICEEndpoint := "-"
+		if peerState.IceCandidateEndpoint.Remote != "" {
+			remoteICEEndpoint = peerState.IceCandidateEndpoint.Remote
+		}
+		lastStatusUpdate := "-"
+		if !peerState.LastStatusUpdate.IsZero() {
+			lastStatusUpdate = peerState.LastStatusUpdate.Format("2006-01-02 15:04:05")
+		}
+
+		lastWireGuardHandshake := "-"
+		if !peerState.LastWireguardHandshake.IsZero() && peerState.LastWireguardHandshake != time.Unix(0, 0) {
+			lastWireGuardHandshake = peerState.LastWireguardHandshake.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)"
+			}
+		}
+
 		peerString := fmt.Sprintf(
 			"\n %s:\n"+
 				"  NetBird IP: %s\n"+
@@ -418,7 +565,11 @@ func parsePeers(peers peersStateOutput) string {
 				"  Connection type: %s\n"+
 				"  Direct: %t\n"+
 				"  ICE candidate (Local/Remote): %s/%s\n"+
-				"  Last connection update: %s\n",
+				"  ICE candidate endpoints (Local/Remote): %s/%s\n"+
+				"  Last connection update: %s\n"+
+				"  Last WireGuard handshake: %s\n"+
+				"  Transfer status (received/sent) %s/%s\n"+
+				"  Quantum resistance: %s\n",
 			peerState.FQDN,
 			peerState.IP,
 			peerState.PubKey,
@@ -427,7 +578,13 @@ func parsePeers(peers peersStateOutput) string {
 			peerState.Direct,
 			localICE,
 			remoteICE,
-			peerState.LastStatusUpdate.Format("2006-01-02 15:04:05"),
+			localICEEndpoint,
+			remoteICEEndpoint,
+			lastStatusUpdate,
+			lastWireGuardHandshake,
+			toIEC(peerState.TransferReceived),
+			toIEC(peerState.TransferSent),
+			rosenpassEnabledStatus,
 		)
 
 		peersString += peerString
@@ -467,3 +624,17 @@ func skipDetailByFilters(peerState *proto.PeerState, isConnected bool) bool {
 
 	return statusEval || ipEval || nameEval
 }
+
+func toIEC(b int64) string {
+	const unit = 1024
+	if b < unit {
+		return fmt.Sprintf("%d B", b)
+	}
+	div, exp := int64(unit), 0
+	for n := b / unit; n >= unit; n /= unit {
+		div *= unit
+		exp++
+	}
+	return fmt.Sprintf("%.1f %ciB",
+		float64(b)/float64(div), "KMGTPE"[exp])
+}

client/cmd/status_test.go

@@ -1,10 +1,13 @@
 package cmd
 
 import (
+	"bytes"
+	"encoding/json"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"google.golang.org/protobuf/types/known/timestamppb"
 
 	"github.com/netbirdio/netbird/client/proto"
@@ -25,35 +28,59 @@ var resp = &proto.StatusResponse{
 	FullStatus: &proto.FullStatus{
 		Peers: []*proto.PeerState{
 			{
-				IP:                     "192.168.178.101",
-				PubKey:                 "Pubkey1",
-				Fqdn:                   "peer-1.awesome-domain.com",
-				ConnStatus:             "Connected",
-				ConnStatusUpdate:       timestamppb.New(time.Date(2001, time.Month(1), 1, 1, 1, 1, 0, time.UTC)),
-				Relayed:                false,
-				Direct:                 true,
-				LocalIceCandidateType:  "",
-				RemoteIceCandidateType: "",
+				IP:                         "192.168.178.101",
+				PubKey:                     "Pubkey1",
+				Fqdn:                       "peer-1.awesome-domain.com",
+				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:  "",
+				RemoteIceCandidateEndpoint: "",
+				LastWireguardHandshake:     timestamppb.New(time.Date(2001, time.Month(1), 1, 1, 1, 2, 0, time.UTC)),
+				BytesRx:                    200,
+				BytesTx:                    100,
 			},
 			{
-				IP:                     "192.168.178.102",
-				PubKey:                 "Pubkey2",
-				Fqdn:                   "peer-2.awesome-domain.com",
-				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",
+				IP:                         "192.168.178.102",
+				PubKey:                     "Pubkey2",
+				Fqdn:                       "peer-2.awesome-domain.com",
+				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",
+				RemoteIceCandidateEndpoint: "10.0.10.1:10002",
+				LastWireguardHandshake:     timestamppb.New(time.Date(2002, time.Month(2), 2, 2, 2, 3, 0, time.UTC)),
+				BytesRx:                    2000,
+				BytesTx:                    1000,
 			},
 		},
 		ManagementState: &proto.ManagementState{
 			URL:       "my-awesome-management.com:443",
 			Connected: true,
+			Error:     "",
 		},
 		SignalState: &proto.SignalState{
 			URL:       "my-awesome-signal.com:443",
 			Connected: true,
+			Error:     "",
+		},
+		Relays: []*proto.RelayState{
+			{
+				URI:       "stun:my-awesome-stun.com:3478",
+				Available: true,
+				Error:     "",
+			},
+			{
+				URI:       "turns:my-awesome-turn.com:443?transport=tcp",
+				Available: false,
+				Error:     "context: deadline exceeded",
+			},
 		},
 		LocalPeerState: &proto.LocalPeerState{
 			IP:              "192.168.178.100/16",
@@ -82,6 +109,13 @@ var overview = statusOutputOverview{
 					Local:  "",
 					Remote: "",
 				},
+				IceCandidateEndpoint: iceCandidateType{
+					Local:  "",
+					Remote: "",
+				},
+				LastWireguardHandshake: time.Date(2001, 1, 1, 1, 1, 2, 0, time.UTC),
+				TransferReceived:       200,
+				TransferSent:           100,
 			},
 			{
 				IP:               "192.168.178.102",
@@ -95,6 +129,13 @@ var overview = statusOutputOverview{
 					Local:  "relay",
 					Remote: "prflx",
 				},
+				IceCandidateEndpoint: iceCandidateType{
+					Local:  "10.0.0.1:10001",
+					Remote: "10.0.10.1:10002",
+				},
+				LastWireguardHandshake: time.Date(2002, 2, 2, 2, 2, 3, 0, time.UTC),
+				TransferReceived:       2000,
+				TransferSent:           1000,
 			},
 		},
 	},
@@ -103,10 +144,28 @@ var overview = statusOutputOverview{
 	ManagementState: managementStateOutput{
 		URL:       "my-awesome-management.com:443",
 		Connected: true,
+		Error:     "",
 	},
 	SignalState: signalStateOutput{
 		URL:       "my-awesome-signal.com:443",
 		Connected: true,
+		Error:     "",
+	},
+	Relays: relayStateOutput{
+		Total:     2,
+		Available: 1,
+		Details: []relayStateOutputDetail{
+			{
+				URI:       "stun:my-awesome-stun.com:3478",
+				Available: true,
+				Error:     "",
+			},
+			{
+				URI:       "turns:my-awesome-turn.com:443?transport=tcp",
+				Available: false,
+				Error:     "context: deadline exceeded",
+			},
+		},
 	},
 	IP:              "192.168.178.100/16",
 	PubKey:          "Some-Pub-Key",
@@ -145,107 +204,171 @@ func TestSortingOfPeers(t *testing.T) {
 }
 
 func TestParsingToJSON(t *testing.T) {
-	json, _ := parseToJSON(overview)
+	jsonString, _ := parseToJSON(overview)
 
 	//@formatter:off
-	expectedJSON := "{\"" +
-		"peers\":" +
-		"{" +
-		"\"total\":2," +
-		"\"connected\":2," +
-		"\"details\":" +
-		"[" +
-		"{" +
-		"\"fqdn\":\"peer-1.awesome-domain.com\"," +
-		"\"netbirdIp\":\"192.168.178.101\"," +
-		"\"publicKey\":\"Pubkey1\"," +
-		"\"status\":\"Connected\"," +
-		"\"lastStatusUpdate\":\"2001-01-01T01:01:01Z\"," +
-		"\"connectionType\":\"P2P\"," +
-		"\"direct\":true," +
-		"\"iceCandidateType\":" +
-		"{" +
-		"\"local\":\"\"," +
-		"\"remote\":\"\"" +
-		"}" +
-		"}," +
-		"{" +
-		"\"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\"" +
-		"}" +
-		"}" +
-		"]" +
-		"}," +
-		"\"cliVersion\":\"development\"," +
-		"\"daemonVersion\":\"0.14.1\"," +
-		"\"management\":" +
-		"{" +
-		"\"url\":\"my-awesome-management.com:443\"," +
-		"\"connected\":true" +
-		"}," +
-		"\"signal\":" +
-		"{\"" +
-		"url\":\"my-awesome-signal.com:443\"," +
-		"\"connected\":true" +
-		"}," +
-		"\"netbirdIp\":\"192.168.178.100/16\"," +
-		"\"publicKey\":\"Some-Pub-Key\"," +
-		"\"usesKernelInterface\":true," +
-		"\"fqdn\":\"some-localhost.awesome-domain.com\"" +
-		"}"
+	expectedJSONString := `
+        {
+          "peers": {
+            "total": 2,
+            "connected": 2,
+            "details": [
+              {
+                "fqdn": "peer-1.awesome-domain.com",
+                "netbirdIp": "192.168.178.101",
+                "publicKey": "Pubkey1",
+                "status": "Connected",
+                "lastStatusUpdate": "2001-01-01T01:01:01Z",
+                "connectionType": "P2P",
+                "direct": true,
+                "iceCandidateType": {
+                  "local": "",
+                  "remote": ""
+                },
+                "iceCandidateEndpoint": {
+                  "local": "",
+                  "remote": ""
+                },
+                "lastWireguardHandshake": "2001-01-01T01:01:02Z",
+                "transferReceived": 200,
+                "transferSent": 100,
+				"quantumResistance":false
+              },
+              {
+                "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"
+                },
+                "lastWireguardHandshake": "2002-02-02T02:02:03Z",
+                "transferReceived": 2000,
+                "transferSent": 1000,
+				"quantumResistance":false
+              }
+            ]
+          },
+          "cliVersion": "development",
+          "daemonVersion": "0.14.1",
+          "management": {
+            "url": "my-awesome-management.com:443",
+            "connected": true,
+            "error": ""
+          },
+          "signal": {
+            "url": "my-awesome-signal.com:443",
+            "connected": true,
+            "error": ""
+          },
+          "relays": {
+            "total": 2,
+            "available": 1,
+            "details": [
+              {
+                "uri": "stun:my-awesome-stun.com:3478",
+                "available": true,
+                "error": ""
+              },
+              {
+                "uri": "turns:my-awesome-turn.com:443?transport=tcp",
+                "available": false,
+                "error": "context: deadline exceeded"
+              }
+            ]
+          },
+          "netbirdIp": "192.168.178.100/16",
+          "publicKey": "Some-Pub-Key",
+          "usesKernelInterface": true,
+          "fqdn": "some-localhost.awesome-domain.com",
+          "quantumResistance":false,
+          "quantumResistancePermissive":false
+        }`
 	// @formatter:on
 
-	assert.Equal(t, expectedJSON, json)
+	var expectedJSON bytes.Buffer
+	require.NoError(t, json.Compact(&expectedJSON, []byte(expectedJSONString)))
+
+	assert.Equal(t, expectedJSON.String(), jsonString)
 }
 
 func TestParsingToYAML(t *testing.T) {
 	yaml, _ := parseToYAML(overview)
 
-	expectedYAML := "peers:\n" +
-		"    total: 2\n" +
-		"    connected: 2\n" +
-		"    details:\n" +
-		"        - fqdn: peer-1.awesome-domain.com\n" +
-		"          netbirdIp: 192.168.178.101\n" +
-		"          publicKey: Pubkey1\n" +
-		"          status: Connected\n" +
-		"          lastStatusUpdate: 2001-01-01T01:01:01Z\n" +
-		"          connectionType: P2P\n" +
-		"          direct: true\n" +
-		"          iceCandidateType:\n" +
-		"            local: \"\"\n" +
-		"            remote: \"\"\n" +
-		"        - fqdn: peer-2.awesome-domain.com\n" +
-		"          netbirdIp: 192.168.178.102\n" +
-		"          publicKey: Pubkey2\n" +
-		"          status: Connected\n" +
-		"          lastStatusUpdate: 2002-02-02T02:02:02Z\n" +
-		"          connectionType: Relayed\n" +
-		"          direct: false\n" +
-		"          iceCandidateType:\n" +
-		"            local: relay\n" +
-		"            remote: prflx\n" +
-		"cliVersion: development\n" +
-		"daemonVersion: 0.14.1\n" +
-		"management:\n" +
-		"    url: my-awesome-management.com:443\n" +
-		"    connected: true\n" +
-		"signal:\n" +
-		"    url: my-awesome-signal.com:443\n" +
-		"    connected: true\n" +
-		"netbirdIp: 192.168.178.100/16\n" +
-		"publicKey: Some-Pub-Key\n" +
-		"usesKernelInterface: true\n" +
-		"fqdn: some-localhost.awesome-domain.com\n"
+	expectedYAML :=
+		`peers:
+    total: 2
+    connected: 2
+    details:
+        - fqdn: peer-1.awesome-domain.com
+          netbirdIp: 192.168.178.101
+          publicKey: Pubkey1
+          status: Connected
+          lastStatusUpdate: 2001-01-01T01:01:01Z
+          connectionType: P2P
+          direct: true
+          iceCandidateType:
+            local: ""
+            remote: ""
+          iceCandidateEndpoint:
+            local: ""
+            remote: ""
+          lastWireguardHandshake: 2001-01-01T01:01:02Z
+          transferReceived: 200
+          transferSent: 100
+          quantumResistance: false
+        - 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
+          lastWireguardHandshake: 2002-02-02T02:02:03Z
+          transferReceived: 2000
+          transferSent: 1000
+          quantumResistance: false
+cliVersion: development
+daemonVersion: 0.14.1
+management:
+    url: my-awesome-management.com:443
+    connected: true
+    error: ""
+signal:
+    url: my-awesome-signal.com:443
+    connected: true
+    error: ""
+relays:
+    total: 2
+    available: 1
+    details:
+        - uri: stun:my-awesome-stun.com:3478
+          available: true
+          error: ""
+        - uri: turns:my-awesome-turn.com:443?transport=tcp
+          available: false
+          error: 'context: deadline exceeded'
+netbirdIp: 192.168.178.100/16
+publicKey: Some-Pub-Key
+usesKernelInterface: true
+fqdn: some-localhost.awesome-domain.com
+quantumResistance: false
+quantumResistancePermissive: false
+`
 
 	assert.Equal(t, expectedYAML, yaml)
 }
@@ -253,50 +376,68 @@ func TestParsingToYAML(t *testing.T) {
 func TestParsingToDetail(t *testing.T) {
 	detail := parseToFullDetailSummary(overview)
 
-	expectedDetail := "Peers detail:\n" +
-		" peer-1.awesome-domain.com:\n" +
-		"  NetBird IP: 192.168.178.101\n" +
-		"  Public key: Pubkey1\n" +
-		"  Status: Connected\n" +
-		"  -- detail --\n" +
-		"  Connection type: P2P\n" +
-		"  Direct: true\n" +
-		"  ICE candidate (Local/Remote): -/-\n" +
-		"  Last connection update: 2001-01-01 01:01:01\n" +
-		"\n" +
-		" peer-2.awesome-domain.com:\n" +
-		"  NetBird IP: 192.168.178.102\n" +
-		"  Public key: Pubkey2\n" +
-		"  Status: Connected\n" +
-		"  -- detail --\n" +
-		"  Connection type: Relayed\n" +
-		"  Direct: false\n" +
-		"  ICE candidate (Local/Remote): relay/prflx\n" +
-		"  Last connection update: 2002-02-02 02:02:02\n" +
-		"\n" +
-		"Daemon version: 0.14.1\n" +
-		"CLI version: development\n" +
-		"Management: Connected to my-awesome-management.com:443\n" +
-		"Signal: Connected to my-awesome-signal.com:443\n" +
-		"FQDN: some-localhost.awesome-domain.com\n" +
-		"NetBird IP: 192.168.178.100/16\n" +
-		"Interface type: Kernel\n" +
-		"Peers count: 2/2 Connected\n"
+	expectedDetail :=
+		`Peers detail:
+ peer-1.awesome-domain.com:
+  NetBird IP: 192.168.178.101
+  Public key: Pubkey1
+  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
+  Transfer status (received/sent) 200 B/100 B
+  Quantum resistance: false
+
+ peer-2.awesome-domain.com:
+  NetBird IP: 192.168.178.102
+  Public key: Pubkey2
+  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
+  Transfer status (received/sent) 2.0 KiB/1000 B
+  Quantum resistance: false
+
+Daemon version: 0.14.1
+CLI version: development
+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
+FQDN: some-localhost.awesome-domain.com
+NetBird IP: 192.168.178.100/16
+Interface type: Kernel
+Quantum resistance: false
+Peers count: 2/2 Connected
+`
 
 	assert.Equal(t, expectedDetail, detail)
 }
 
 func TestParsingToShortVersion(t *testing.T) {
-	shortVersion := parseGeneralSummary(overview, false)
+	shortVersion := parseGeneralSummary(overview, false, false)
 
-	expectedString := "Daemon version: 0.14.1\n" +
-		"CLI version: development\n" +
-		"Management: Connected\n" +
-		"Signal: Connected\n" +
-		"FQDN: some-localhost.awesome-domain.com\n" +
-		"NetBird IP: 192.168.178.100/16\n" +
-		"Interface type: Kernel\n" +
-		"Peers count: 2/2 Connected\n"
+	expectedString :=
+		`Daemon version: 0.14.1
+CLI version: development
+Management: Connected
+Signal: Connected
+Relays: 1/2 Available
+FQDN: some-localhost.awesome-domain.com
+NetBird IP: 192.168.178.100/16
+Interface type: Kernel
+Quantum resistance: false
+Peers count: 2/2 Connected
+`
 
 	assert.Equal(t, expectedString, shortVersion)
 }

client/cmd/testutil.go

@@ -78,8 +78,7 @@ func startManagement(t *testing.T, config *mgmt.Config) (*grpc.Server, net.Liste
 	if err != nil {
 		return nil, nil
 	}
-	accountManager, err := mgmt.BuildManager(store, peersUpdateManager, nil, "", "",
-		eventStore, false)
+	accountManager, err := mgmt.BuildManager(store, peersUpdateManager, nil, "", "", eventStore, nil, false)
 	if err != nil {
 		t.Fatal(err)
 	}

client/cmd/up.go

@@ -94,6 +94,14 @@ func runInForegroundMode(ctx context.Context, cmd *cobra.Command) error {
 		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
@@ -110,6 +118,18 @@ func runInForegroundMode(ctx context.Context, cmd *cobra.Command) error {
 		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.")
+		}
+	}
+
 	config, err := internal.UpdateOrCreateConfig(ic)
 	if err != nil {
 		return fmt.Errorf("get config file: %v", err)
@@ -163,7 +183,6 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 
 	loginRequest := proto.LoginRequest{
 		SetupKey:             setupKey,
-		PreSharedKey:         preSharedKey,
 		ManagementUrl:        managementURL,
 		AdminURL:             adminURL,
 		NatExternalIPs:       natExternalIPs,
@@ -173,10 +192,26 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 		Hostname:             hostName,
 	}
 
+	if rootCmd.PersistentFlags().Changed(preSharedKeyFlag) {
+		loginRequest.OptionalPreSharedKey = &preSharedKey
+	}
+
 	if cmd.Flag(enableRosenpassFlag).Changed {
 		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

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"`

client/internal/config.go

@@ -35,15 +35,18 @@ var defaultInterfaceBlacklist = []string{iface.WgInterfaceDefault, "wt", "utun",
 
 // 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
+	DisableAutoConnect  *bool
 }
 
 // Config Configuration type
@@ -58,6 +61,8 @@ type Config struct {
 	IFaceBlackList       []string
 	DisableIPv6Discovery bool
 	RosenpassEnabled     bool
+	RosenpassPermissive  bool
+	ServerSSHAllowed     *bool
 	// SSHKey is a private SSH key in a PEM format
 	SSHKey string
 
@@ -79,6 +84,10 @@ 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
 }
 
 // ReadConfig read config file and return with Config. If it is not exists create a new with default values
@@ -88,6 +97,7 @@ func ReadConfig(configPath string) (*Config, error) {
 		if _, err := util.ReadJson(configPath, config); err != nil {
 			return nil, err
 		}
+
 		return config, nil
 	}
 
@@ -152,6 +162,8 @@ func createNewConfig(input ConfigInput) (*Config, error) {
 		DisableIPv6Discovery: false,
 		NATExternalIPs:       input.NATExternalIPs,
 		CustomDNSAddress:     string(input.CustomDNSAddress),
+		ServerSSHAllowed:     util.False(),
+		DisableAutoConnect:   false,
 	}
 
 	defaultManagementURL, err := parseURL("Management URL", DefaultManagementURL)
@@ -186,6 +198,14 @@ func createNewConfig(input ConfigInput) (*Config, error) {
 		config.RosenpassEnabled = *input.RosenpassEnabled
 	}
 
+	if input.RosenpassPermissive != nil {
+		config.RosenpassPermissive = *input.RosenpassPermissive
+	}
+
+	if input.ServerSSHAllowed != nil {
+		config.ServerSSHAllowed = input.ServerSSHAllowed
+	}
+
 	defaultAdminURL, err := parseURL("Admin URL", DefaultAdminURL)
 	if err != nil {
 		return nil, err
@@ -280,6 +300,26 @@ func update(input ConfigInput) (*Config, error) {
 		refresh = true
 	}
 
+	if input.RosenpassPermissive != nil {
+		config.RosenpassPermissive = *input.RosenpassPermissive
+		refresh = true
+	}
+
+	if input.DisableAutoConnect != nil {
+		config.DisableAutoConnect = *input.DisableAutoConnect
+		refresh = true
+	}
+
+	if input.ServerSSHAllowed != nil {
+		config.ServerSSHAllowed = input.ServerSSHAllowed
+		refresh = true
+	}
+
+	if config.ServerSSHAllowed == nil {
+		config.ServerSSHAllowed = util.True()
+		refresh = true
+	}
+
 	if refresh {
 		// since we have new management URL, we need to update config file
 		if err := util.WriteJson(input.ConfigPath, config); err != nil {

client/internal/connect.go

@@ -2,6 +2,7 @@ package internal
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"strings"
 	"time"
@@ -22,16 +23,39 @@ import (
 	mgm "github.com/netbirdio/netbird/management/client"
 	mgmProto "github.com/netbirdio/netbird/management/proto"
 	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{})
+	return runClient(ctx, config, statusRecorder, MobileDependency{}, nil, nil, nil, nil)
+}
+
+// RunClientWithProbes runs the client's main logic with probes attached
+func RunClientWithProbes(
+	ctx context.Context,
+	config *Config,
+	statusRecorder *peer.Status,
+	mgmProbe *Probe,
+	signalProbe *Probe,
+	relayProbe *Probe,
+	wgProbe *Probe,
+) error {
+	return runClient(ctx, config, statusRecorder, MobileDependency{}, mgmProbe, signalProbe, relayProbe, wgProbe)
 }
 
 // RunClientMobile with main logic on mobile system
-func RunClientMobile(ctx context.Context, config *Config, statusRecorder *peer.Status, tunAdapter iface.TunAdapter, iFaceDiscover stdnet.ExternalIFaceDiscover, networkChangeListener listener.NetworkChangeListener, dnsAddresses []string, dnsReadyListener dns.ReadyListener) error {
+func RunClientMobile(
+	ctx context.Context,
+	config *Config,
+	statusRecorder *peer.Status,
+	tunAdapter iface.TunAdapter,
+	iFaceDiscover stdnet.ExternalIFaceDiscover,
+	networkChangeListener listener.NetworkChangeListener,
+	dnsAddresses []string,
+	dnsReadyListener dns.ReadyListener,
+) error {
 	// in case of non Android os these variables will be nil
 	mobileDependency := MobileDependency{
 		TunAdapter:            tunAdapter,
@@ -40,21 +64,43 @@ func RunClientMobile(ctx context.Context, config *Config, statusRecorder *peer.S
 		HostDNSAddresses:      dnsAddresses,
 		DnsReadyListener:      dnsReadyListener,
 	}
-	return runClient(ctx, config, statusRecorder, mobileDependency)
+	return runClient(ctx, config, statusRecorder, mobileDependency, nil, nil, nil, nil)
 }
 
-func RunClientiOS(ctx context.Context, config *Config, statusRecorder *peer.Status, fileDescriptor int32, networkChangeListener listener.NetworkChangeListener, dnsManager dns.IosDnsManager) error {
+func RunClientiOS(
+	ctx context.Context,
+	config *Config,
+	statusRecorder *peer.Status,
+	fileDescriptor int32,
+	networkChangeListener listener.NetworkChangeListener,
+	dnsManager dns.IosDnsManager,
+) error {
 	mobileDependency := MobileDependency{
 		FileDescriptor:        fileDescriptor,
 		NetworkChangeListener: networkChangeListener,
 		DnsManager:            dnsManager,
 	}
-	return runClient(ctx, config, statusRecorder, mobileDependency)
+	return runClient(ctx, config, statusRecorder, mobileDependency, nil, nil, nil, nil)
 }
 
-func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status, mobileDependency MobileDependency) error {
+func runClient(
+	ctx context.Context,
+	config *Config,
+	statusRecorder *peer.Status,
+	mobileDependency MobileDependency,
+	mgmProbe *Probe,
+	signalProbe *Probe,
+	relayProbe *Probe,
+	wgProbe *Probe,
+) error {
 	log.Infof("starting NetBird client version %s", version.NetbirdVersion())
 
+	// 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(config.WgIface); err != nil {
+		log.Errorf("checking unclean shutdown error: %s", err)
+	}
+
 	backOff := &backoff.ExponentialBackOff{
 		InitialInterval:     time.Second,
 		RandomizationFactor: 1,
@@ -103,7 +149,7 @@ func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status,
 
 		engineCtx, cancel := context.WithCancel(ctx)
 		defer func() {
-			statusRecorder.MarkManagementDisconnected()
+			statusRecorder.MarkManagementDisconnected(state.err)
 			statusRecorder.CleanLocalPeerState()
 			cancel()
 		}()
@@ -152,8 +198,10 @@ func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status,
 
 		statusRecorder.UpdateSignalAddress(signalURL)
 
-		statusRecorder.MarkSignalDisconnected()
-		defer statusRecorder.MarkSignalDisconnected()
+		statusRecorder.MarkSignalDisconnected(nil)
+		defer func() {
+			statusRecorder.MarkSignalDisconnected(state.err)
+		}()
 
 		// with the global Wiretrustee config in hand connect (just a connection, no stream yet) Signal
 		signalClient, err := connectToSignal(engineCtx, loginResp.GetWiretrusteeConfig(), myPrivateKey)
@@ -181,7 +229,7 @@ func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status,
 			return wrapErr(err)
 		}
 
-		engine := NewEngine(engineCtx, cancel, signalClient, mgmClient, engineConfig, mobileDependency, statusRecorder)
+		engine := NewEngineWithProbes(engineCtx, cancel, signalClient, mgmClient, engineConfig, mobileDependency, statusRecorder, mgmProbe, signalProbe, relayProbe, wgProbe)
 		err = engine.Start()
 		if err != nil {
 			log.Errorf("error while starting Netbird Connection Engine: %s", err)
@@ -204,7 +252,7 @@ func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status,
 
 		log.Info("stopped NetBird client")
 
-		if _, err := state.Status(); err == ErrResetConnection {
+		if _, err := state.Status(); errors.Is(err, ErrResetConnection) {
 			return err
 		}
 
@@ -236,6 +284,8 @@ func createEngineConfig(key wgtypes.Key, config *Config, peerConfig *mgmProto.Pe
 		NATExternalIPs:       config.NATExternalIPs,
 		CustomDNSAddress:     config.CustomDNSAddress,
 		RosenpassEnabled:     config.RosenpassEnabled,
+		RosenpassPermissive:  config.RosenpassPermissive,
+		ServerSSHAllowed:     util.ReturnBoolWithDefaultTrue(config.ServerSSHAllowed),
 	}
 
 	if config.PreSharedKey != "" {

client/internal/dns/dbus_linux.go

@@ -4,9 +4,11 @@ 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_linux.go

@@ -3,11 +3,12 @@
 package dns
 
 import (
-	"bufio"
 	"bytes"
 	"fmt"
+	"net/netip"
 	"os"
 	"strings"
+	"time"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -23,12 +24,22 @@ const (
 	fileMaxNumberOfSearchDomains = 6
 )
 
+const (
+	dnsFailoverTimeout  = 4 * time.Second
+	dnsFailoverAttempts = 1
+)
+
 type fileConfigurator struct {
-	originalPerms os.FileMode
+	repair *repair
+
+	originalPerms  os.FileMode
+	nbNameserverIP string
 }
 
 func newFileConfigurator() (hostManager, error) {
-	return &fileConfigurator{}, nil
+	fc := &fileConfigurator{}
+	fc.repair = newRepair(defaultResolvConfPath, fc.updateConfig)
+	return fc, nil
 }
 
 func (f *fileConfigurator) supportCustomPort() bool {
@@ -46,7 +57,7 @@ func (f *fileConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		if backupFileExist {
 			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("unable to configure DNS for this peer using file manager without a Primary nameserver group. Restoring the original 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")
@@ -55,66 +66,150 @@ func (f *fileConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	if !backupFileExist {
 		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)
 		}
 	}
 
-	searchDomainList := searchDomains(config)
+	nbSearchDomains := searchDomains(config)
+	f.nbNameserverIP = config.ServerIP
 
-	originalSearchDomains, nameServers, others, err := originalDNSConfigs(fileDefaultResolvConfBackupLocation)
+	resolvConf, err := parseBackupResolvConf()
 	if err != nil {
-		log.Error(err)
+		log.Errorf("could not read original search domains from %s: %s", fileDefaultResolvConfBackupLocation, err)
 	}
 
-	searchDomainList = mergeSearchDomains(searchDomainList, originalSearchDomains)
+	f.repair.stopWatchFileChanges()
 
+	err = f.updateConfig(nbSearchDomains, f.nbNameserverIP, resolvConf)
+	if err != nil {
+		return err
+	}
+	f.repair.watchFileChanges(nbSearchDomains, f.nbNameserverIP)
+	return nil
+}
+
+func (f *fileConfigurator) updateConfig(nbSearchDomains []string, nbNameserverIP string, cfg *resolvConf) error {
+	searchDomainList := mergeSearchDomains(nbSearchDomains, cfg.searchDomains)
+	nameServers := generateNsList(nbNameserverIP, cfg)
+
+	options := prepareOptionsWithTimeout(cfg.others, int(dnsFailoverTimeout.Seconds()), dnsFailoverAttempts)
 	buf := prepareResolvConfContent(
 		searchDomainList,
-		append([]string{config.ServerIP}, nameServers...),
-		others)
+		nameServers,
+		options)
 
 	log.Debugf("creating managed file %s", defaultResolvConfPath)
-	err = os.WriteFile(defaultResolvConfPath, buf.Bytes(), f.originalPerms)
+	err := os.WriteFile(defaultResolvConfPath, buf.Bytes(), f.originalPerms)
 	if err != nil {
 		restoreErr := f.restore()
 		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
 }
 
 func (f *fileConfigurator) restoreHostDNS() error {
+	f.repair.stopWatchFileChanges()
 	return f.restore()
 }
 
 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 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)
+	ns[0] = nbNameserverIP
+	for _, cfgNs := range cfg.nameServers {
+		if nbNameserverIP != cfgNs {
+			ns = append(ns, cfgNs)
+		}
+	}
+	return ns
+}
+
 func prepareResolvConfContent(searchDomains, nameServers, others []string) bytes.Buffer {
 	var buf bytes.Buffer
 	buf.WriteString(fileGeneratedResolvConfContentHeaderNextLine)
@@ -150,70 +245,6 @@ func searchDomains(config HostDNSConfig) []string {
 	return listOfDomains
 }
 
-func originalDNSConfigs(resolvconfFile string) (searchDomains, nameServers, others []string, err error) {
-	file, err := os.Open(resolvconfFile)
-	if err != nil {
-		err = fmt.Errorf(`could not read existing resolv.conf`)
-		return
-	}
-	defer file.Close()
-
-	reader := bufio.NewReader(file)
-
-	for {
-		lineBytes, isPrefix, readErr := reader.ReadLine()
-		if readErr != nil {
-			break
-		}
-
-		if isPrefix {
-			err = fmt.Errorf(`resolv.conf line too long`)
-			return
-		}
-
-		line := strings.TrimSpace(string(lineBytes))
-
-		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
-			}
-
-			searchDomains = splitLines[1:]
-			continue
-		}
-
-		if strings.HasPrefix(line, "nameserver") {
-			splitLines := strings.Fields(line)
-			if len(splitLines) != 2 {
-				continue
-			}
-			nameServers = append(nameServers, splitLines[1])
-			continue
-		}
-
-		others = append(others, line)
-	}
-	return
-}
-
 // merge search Domains lists and cut off the list if it is too long
 func mergeSearchDomains(searchDomains []string, originalSearchDomains []string) []string {
 	lineSize := len("search")
@@ -230,6 +261,19 @@ func mergeSearchDomains(searchDomains []string, originalSearchDomains []string)
 // return with the number of characters in the searchDomains line
 func validateAndFillSearchDomains(initialLineChars int, s *[]string, vs []string) int {
 	for _, sd := range vs {
+		duplicated := false
+		for _, fs := range *s {
+			if fs == sd {
+				duplicated = true
+				break
+			}
+
+		}
+
+		if duplicated {
+			continue
+		}
+
 		tmpCharsNumber := initialLineChars + 1 + len(sd)
 		if tmpCharsNumber > fileMaxLineCharsLimit {
 			// lets log all skipped Domains
@@ -246,23 +290,39 @@ func validateAndFillSearchDomains(initialLineChars int, s *[]string, vs []string
 		}
 		*s = append(*s, sd)
 	}
+
 	return initialLineChars
 }
 
 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
 }
+
+func isContains(subList []string, list []string) bool {
+	for _, sl := range subList {
+		var found bool
+		for _, l := range list {
+			if sl == l {
+				found = true
+			}
+		}
+		if !found {
+			return false
+		}
+	}
+	return true
+}

client/internal/dns/file_linux_test.go

@@ -1,3 +1,5 @@
+//go:build !android
+
 package dns
 
 import (
@@ -7,7 +9,7 @@ import (
 
 func Test_mergeSearchDomains(t *testing.T) {
 	searchDomains := []string{"a", "b"}
-	originDomains := []string{"a", "b"}
+	originDomains := []string{"c", "d"}
 	mergedDomains := mergeSearchDomains(searchDomains, originDomains)
 	if len(mergedDomains) != 4 {
 		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 4)
@@ -49,6 +51,67 @@ func Test_mergeSearchTooLongDomain(t *testing.T) {
 	}
 }
 
+func Test_isContains(t *testing.T) {
+	type args struct {
+		subList []string
+		list    []string
+	}
+	tests := []struct {
+		args args
+		want bool
+	}{
+		{
+			args: args{
+				subList: []string{"a", "b", "c"},
+				list:    []string{"a", "b", "c"},
+			},
+			want: true,
+		},
+		{
+			args: args{
+				subList: []string{"a"},
+				list:    []string{"a", "b", "c"},
+			},
+			want: true,
+		},
+		{
+			args: args{
+				subList: []string{"d"},
+				list:    []string{"a", "b", "c"},
+			},
+			want: false,
+		},
+		{
+			args: args{
+				subList: []string{"a"},
+				list:    []string{},
+			},
+			want: false,
+		},
+		{
+			args: args{
+				subList: []string{},
+				list:    []string{"b"},
+			},
+			want: true,
+		},
+		{
+			args: args{
+				subList: []string{},
+				list:    []string{},
+			},
+			want: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run("list check test", func(t *testing.T) {
+			if got := isContains(tt.args.subList, tt.args.list); got != tt.want {
+				t.Errorf("isContains() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
 func getLongLine() string {
 	x := "search "
 	for {

client/internal/dns/file_parser_linux.go

@@ -0,0 +1,168 @@
+//go:build !android
+
+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_linux_test.go

@@ -0,0 +1,304 @@
+//go:build !android
+
+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_linux.go

@@ -0,0 +1,159 @@
+//go:build !android
+
+package dns
+
+import (
+	"path"
+	"path/filepath"
+	"sync"
+
+	"github.com/fsnotify/fsnotify"
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	eventTypes = []fsnotify.Op{
+		fsnotify.Create,
+		fsnotify.Write,
+		fsnotify.Remove,
+		fsnotify.Rename,
+	}
+)
+
+type repairConfFn func([]string, string, *resolvConf) error
+
+type repair struct {
+	operationFile string
+	updateFn      repairConfFn
+	watchDir      string
+
+	inotify   *fsnotify.Watcher
+	inotifyWg sync.WaitGroup
+}
+
+func newRepair(operationFile string, updateFn repairConfFn) *repair {
+	targetFile := targetFile(operationFile)
+	return &repair{
+		operationFile: targetFile,
+		watchDir:      path.Dir(targetFile),
+		updateFn:      updateFn,
+	}
+}
+
+func (f *repair) watchFileChanges(nbSearchDomains []string, nbNameserverIP string) {
+	if f.inotify != nil {
+		return
+	}
+
+	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)
+		return
+	}
+	f.inotify = inotify
+
+	f.inotifyWg.Add(1)
+	go func() {
+		defer f.inotifyWg.Done()
+		for event := range f.inotify.Events {
+			if !f.isEventRelevant(event) {
+				continue
+			}
+
+			log.Tracef("%s changed, check if it is broken", f.operationFile)
+
+			rConf, err := parseResolvConfFile(f.operationFile)
+			if err != nil {
+				log.Warnf("failed to parse resolv conf: %s", err)
+				continue
+			}
+
+			log.Debugf("check resolv.conf parameters: %s", rConf)
+			if !isNbParamsMissing(nbSearchDomains, nbNameserverIP, rConf) {
+				log.Tracef("resolv.conf still correct, skip the update")
+				continue
+			}
+			log.Info("broken params in resolv.conf, repairing it...")
+
+			err = f.inotify.Remove(f.watchDir)
+			if err != nil {
+				log.Errorf("failed to rm inotify watch for resolv.conf: %s", err)
+			}
+
+			err = f.updateFn(nbSearchDomains, nbNameserverIP, rConf)
+			if err != nil {
+				log.Errorf("failed to repair resolv.conf: %v", err)
+			}
+
+			err = f.inotify.Add(f.watchDir)
+			if err != nil {
+				log.Errorf("failed to re-add inotify watch for resolv.conf: %s", err)
+				return
+			}
+		}
+	}()
+
+	err = f.inotify.Add(f.watchDir)
+	if err != nil {
+		log.Errorf("failed to add inotify watch for resolv.conf: %s", err)
+		return
+	}
+}
+
+func (f *repair) stopWatchFileChanges() {
+	if f.inotify == nil {
+		return
+	}
+	err := f.inotify.Close()
+	if err != nil {
+		log.Warnf("failed to close resolv.conf inotify: %v", err)
+	}
+	f.inotifyWg.Wait()
+	f.inotify = nil
+}
+
+func (f *repair) isEventRelevant(event fsnotify.Event) bool {
+	var ok bool
+	for _, et := range eventTypes {
+		if event.Has(et) {
+			ok = true
+			break
+		}
+	}
+	if !ok {
+		return false
+	}
+
+	if event.Name == f.operationFile {
+		return true
+	}
+	return false
+}
+
+// nbParamsAreMissing checks if the resolv.conf file contains all the parameters that NetBird needs
+// check the NetBird related nameserver IP at the first place
+// check the NetBird related search domains in the search domains list
+func isNbParamsMissing(nbSearchDomains []string, nbNameserverIP string, rConf *resolvConf) bool {
+	if !isContains(nbSearchDomains, rConf.searchDomains) {
+		return true
+	}
+
+	if len(rConf.nameServers) == 0 {
+		return true
+	}
+
+	if rConf.nameServers[0] != nbNameserverIP {
+		return true
+	}
+
+	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_linux_test.go

@@ -0,0 +1,175 @@
+//go:build !android
+
+package dns
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/netbirdio/netbird/util"
+)
+
+func TestMain(m *testing.M) {
+	_ = util.InitLog("debug", "console")
+	code := m.Run()
+	os.Exit(code)
+}
+
+func Test_newRepairtmp(t *testing.T) {
+	type args struct {
+		resolvConfContent  string
+		touchedConfContent string
+		wantChange         bool
+	}
+	tests := []args{
+		{
+			resolvConfContent: `
+nameserver 10.0.0.1
+nameserver 8.8.8.8
+searchdomain netbird.cloud something`,
+
+			touchedConfContent: `
+nameserver 8.8.8.8
+searchdomain netbird.cloud something`,
+			wantChange: true,
+		},
+		{
+			resolvConfContent: `
+nameserver 10.0.0.1
+nameserver 8.8.8.8
+searchdomain netbird.cloud something`,
+
+			touchedConfContent: `
+nameserver 10.0.0.1
+nameserver 8.8.8.8
+searchdomain netbird.cloud something somethingelse`,
+			wantChange: false,
+		},
+		{
+			resolvConfContent: `
+nameserver 10.0.0.1
+nameserver 8.8.8.8
+searchdomain netbird.cloud something`,
+
+			touchedConfContent: `
+nameserver 10.0.0.1
+searchdomain netbird.cloud something`,
+			wantChange: false,
+		},
+		{
+			resolvConfContent: `
+nameserver 10.0.0.1
+nameserver 8.8.8.8
+searchdomain netbird.cloud something`,
+
+			touchedConfContent: `
+searchdomain something`,
+			wantChange: true,
+		},
+		{
+			resolvConfContent: `
+nameserver 10.0.0.1
+nameserver 8.8.8.8
+searchdomain netbird.cloud something`,
+
+			touchedConfContent: `
+nameserver 10.0.0.1`,
+			wantChange: true,
+		},
+		{
+			resolvConfContent: `
+nameserver 10.0.0.1
+nameserver 8.8.8.8
+searchdomain netbird.cloud something`,
+
+			touchedConfContent: `
+nameserver 8.8.8.8`,
+			wantChange: true,
+		},
+	}
+
+	for _, tt := range tests {
+		tt := tt
+		t.Run("test", func(t *testing.T) {
+			t.Parallel()
+			workDir := t.TempDir()
+			operationFile := workDir + "/resolv.conf"
+			err := os.WriteFile(operationFile, []byte(tt.resolvConfContent), 0755)
+			if err != nil {
+				t.Fatalf("failed to write out resolv.conf: %s", 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(operationFile, updateFn)
+			r.watchFileChanges([]string{"netbird.cloud"}, "10.0.0.1")
+
+			err = os.WriteFile(operationFile, []byte(tt.touchedConfContent), 0755)
+			if err != nil {
+				t.Fatalf("failed to write out resolv.conf: %s", err)
+			}
+
+			<-ctx.Done()
+
+			r.stopWatchFileChanges()
+
+			if changed != tt.wantChange {
+				t.Errorf("unexpected result: want: %v, got: %v", tt.wantChange, changed)
+			}
+		})
+	}
+}
+
+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/host.go

@@ -2,6 +2,7 @@ package dns
 
 import (
 	"fmt"
+	"net/netip"
 	"strings"
 
 	nbdns "github.com/netbirdio/netbird/dns"
@@ -11,6 +12,7 @@ type hostManager interface {
 	applyDNSConfig(config HostDNSConfig) error
 	restoreHostDNS() error
 	supportCustomPort() bool
+	restoreUncleanShutdownDNS(storedDNSAddress *netip.Addr) error
 }
 
 type HostDNSConfig struct {
@@ -27,9 +29,10 @@ 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 +56,19 @@ 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 +6,8 @@ import (
 	"bufio"
 	"bytes"
 	"fmt"
+	"io"
+	"net/netip"
 	"os/exec"
 	"strconv"
 	"strings"
@@ -34,7 +36,7 @@ type systemConfigurator struct {
 	createdKeys      map[string]struct{}
 }
 
-func newHostManager(_ WGIface) (hostManager, error) {
+func newHostManager() (hostManager, error) {
 	return &systemConfigurator{
 		createdKeys: make(map[string]struct{}),
 	}, nil
@@ -50,17 +52,22 @@ func (s *systemConfigurator) applyDNSConfig(config HostDNSConfig) error {
 	if config.RouteAll {
 		err = s.addDNSSetupForAll(config.ServerIP, config.ServerPort)
 		if err != nil {
-			return err
+			return fmt.Errorf("add dns setup for all: %w", err)
 		}
 	} else if s.primaryServiceID != "" {
 		err = s.removeKeyFromSystemConfig(getKeyWithInput(primaryServiceSetupKeyFormat, s.primaryServiceID))
 		if err != nil {
-			return err
+			return fmt.Errorf("remote key from system config: %w", 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 (
 		searchDomains []string
 		matchDomains  []string
@@ -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)
@@ -96,7 +103,7 @@ 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
@@ -119,7 +126,11 @@ func (s *systemConfigurator) restoreHostDNS() error {
 	_, err := runSystemConfigCommand(wrapCommand(lines))
 	if err != nil {
 		log.Errorf("got an error while cleaning the system configuration: %s", err)
-		return err
+		return fmt.Errorf("clean system: %w", err)
+	}
+
+	if err := removeUncleanShutdownIndicator(); err != nil {
+		log.Errorf("failed to remove unclean shutdown file: %s", err)
 	}
 
 	return nil
@@ -129,7 +140,7 @@ 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)
@@ -140,7 +151,7 @@ func (s *systemConfigurator) removeKeyFromSystemConfig(key string) error {
 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 +164,7 @@ 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 +189,37 @@ 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")
+	primaryServiceKey, existingNameserver, err := s.getPrimaryService()
+	if err != nil || primaryServiceKey == "" {
+		return fmt.Errorf("couldn't find the primary service key: %w", err)
 	}
-	err := s.addDNSSetup(getKeyWithInput(primaryServiceSetupKeyFormat, primaryServiceKey), dnsServer, port, existingNameserver)
+
+	err = s.addDNSSetup(getKeyWithInput(primaryServiceSetupKeyFormat, primaryServiceKey), dnsServer, port, existingNameserver)
 	if err != nil {
-		return err
+		return fmt.Errorf("add dns setup: %w", 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 := ""
@@ -217,7 +232,11 @@ 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 {
@@ -228,7 +247,14 @@ func (s *systemConfigurator) addDNSSetup(setupKey, dnsServer string, port int, e
 	stdinCommands := wrapCommand(addDomainCommand)
 	_, err := runSystemConfigCommand(stdinCommands)
 	if err != nil {
-		return fmt.Errorf("got error while applying dns setup, error: %s", err)
+		return fmt.Errorf("applying dns setup, error: %w", err)
+	}
+	return nil
+}
+
+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 +292,7 @@ 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_linux.go

@@ -4,17 +4,15 @@ package dns
 
 import (
 	"bufio"
+	"errors"
 	"fmt"
+	"io"
 	"os"
 	"strings"
 
 	log "github.com/sirupsen/logrus"
 )
 
-const (
-	defaultResolvConfPath = "/etc/resolv.conf"
-)
-
 const (
 	netbirdManager osManagerType = iota
 	fileManager
@@ -23,8 +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:
@@ -42,13 +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)
@@ -62,12 +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() {
@@ -85,7 +109,11 @@ func getOSDNSManagerType() (osManagerType, error) {
 			return networkManager, nil
 		}
 		if strings.Contains(text, "systemd-resolved") && isDbusListenerRunning(systemdResolvedDest, systemdDbusObjectNode) {
-			return systemdManager, nil
+			if checkStub() {
+				return systemdManager, nil
+			} else {
+				return fileManager, nil
+			}
 		}
 		if strings.Contains(text, "resolvconf") {
 			if isDbusListenerRunning(systemdResolvedDest, systemdDbusObjectNode) {
@@ -101,5 +129,26 @@ func getOSDNSManagerType() (osManagerType, error) {
 			return resolvConfManager, nil
 		}
 	}
+	if err := scanner.Err(); err != nil && err != io.EOF {
+		return 0, fmt.Errorf("scan: %w", err)
+	}
+
 	return fileManager, nil
 }
+
+// checkStub checks if the stub resolver is disabled in systemd-resolved. If it is disabled, we fall back to file manager.
+func checkStub() bool {
+	rConf, err := parseDefaultResolvConf()
+	if err != nil {
+		log.Warnf("failed to parse resolv conf: %s", err)
+		return true
+	}
+
+	for _, ns := range rConf.nameServers {
+		if ns == "127.0.0.53" {
+			return true
+		}
+	}
+
+	return false
+}

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/local.go

@@ -52,7 +52,7 @@ 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()
@@ -71,3 +71,5 @@ func buildRecordKey(name string, class, qType uint16) string {
 	key := fmt.Sprintf("%s_%d_%d", name, class, qType)
 	return key
 }
+
+func (d *localResolver) probeAvailability() {}

client/internal/dns/mock_server.go

@@ -48,3 +48,7 @@ func (m *MockServer) UpdateDNSServer(serial uint64, update nbdns.Config) error {
 func (m *MockServer) SearchDomains() []string {
 	return make([]string, 0)
 }
+
+// ProbeAvailability mocks implementation of ProbeAvailability from the Server interface
+func (m *MockServer) ProbeAvailability() {
+}

client/internal/dns/network_manager_linux.go

@@ -5,8 +5,10 @@ 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_linux.go

@@ -5,6 +5,7 @@ package dns
 import (
 	"bytes"
 	"fmt"
+	"net/netip"
 	"os/exec"
 
 	log "github.com/sirupsen/logrus"
@@ -21,17 +22,17 @@ type resolvconf struct {
 }
 
 // supported "openresolv" only
-func newResolvConfConfigurator(wgInterface WGIface) (hostManager, error) {
-	originalSearchDomains, nameServers, others, err := originalDNSConfigs("/etc/resolv.conf")
+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(),
-		originalSearchDomains: originalSearchDomains,
-		originalNameServers:   nameServers,
-		othersConfigs:         others,
+		ifaceName:             wgInterface,
+		originalSearchDomains: resolvConfEntries.searchDomains,
+		originalNameServers:   resolvConfEntries.nameServers,
+		othersConfigs:         resolvConfEntries.others,
 	}, nil
 }
 
@@ -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

@@ -32,6 +32,7 @@ type Server interface {
 	UpdateDNSServer(serial uint64, update nbdns.Config) error
 	OnUpdatedHostDNSServer(strings []string)
 	SearchDomains() []string
+	ProbeAvailability()
 }
 
 type registeredHandlerMap map[string]handlerWithStop
@@ -63,6 +64,7 @@ type DefaultServer struct {
 type handlerWithStop interface {
 	dns.Handler
 	stop()
+	probeAvailability()
 }
 
 type muxUpdate struct {
@@ -140,12 +142,15 @@ 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
@@ -223,7 +228,7 @@ 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
@@ -248,6 +253,14 @@ func (s *DefaultServer) SearchDomains() []string {
 	return searchDomains
 }
 
+// ProbeAvailability tests each upstream group's servers for availability
+// and deactivates the group if no server responds
+func (s *DefaultServer) ProbeAvailability() {
+	for _, mux := range s.dnsMuxMap {
+		mux.probeAvailability()
+	}
+}
+
 func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
 	// is the service should be Disabled, we stop the listener or fake resolver
 	// and proceed with a regular update to clean up the handlers and records
@@ -378,6 +391,7 @@ func (s *DefaultServer) buildUpstreamHandlerUpdate(nameServerGroups []*nbdns.Nam
 			})
 		}
 	}
+
 	return muxUpdates, nil
 }
 
@@ -488,13 +502,13 @@ func (s *DefaultServer) upstreamCallbacks(
 		}
 
 		l := log.WithField("nameservers", nsGroup.NameServers)
-		l.Debug("reactivate temporary Disabled nameserver group")
+		l.Debug("reactivate temporary disabled nameserver group")
 
 		if nsGroup.Primary {
 			s.currentConfig.RouteAll = true
 		}
 		if err := s.hostManager.applyDNSConfig(s.currentConfig); err != nil {
-			l.WithError(err).Error("reactivate temporary Disabled nameserver group, DNS update apply")
+			l.WithError(err).Error("reactivate temporary disabled nameserver group, DNS update apply")
 		}
 	}
 	return

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_linux.go

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

client/internal/dns/server_test.go

@@ -59,6 +59,10 @@ func (w *mocWGIface) SetFilter(filter iface.PacketFilter) error {
 	return nil
 }
 
+func (w *mocWGIface) GetStats(_ string) (iface.WGStats, error) {
+	return iface.WGStats{}, nil
+}
+
 var zoneRecords = []nbdns.SimpleRecord{
 	{
 		Name:  "peera.netbird.cloud",

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)
 	}
 }
 
@@ -140,54 +131,112 @@ func (s *serviceViaListener) setListenerStatus(running bool) {
 	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

@@ -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
 

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()
 
@@ -194,22 +215,29 @@ 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)

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_linux.go

@@ -0,0 +1,96 @@
+//go:build !android
+
+package dns
+
+import (
+	"errors"
+	"fmt"
+	"io/fs"
+	"net/netip"
+	"os"
+	"path/filepath"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	fileUncleanShutdownResolvConfLocation  = "/var/lib/netbird/resolv.conf"
+	fileUncleanShutdownManagerTypeLocation = "/var/lib/netbird/manager"
+)
+
+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

@@ -19,10 +19,13 @@ const (
 	failsTillDeact   = int32(5)
 	reactivatePeriod = 30 * time.Second
 	upstreamTimeout  = 15 * time.Second
+	probeTimeout     = 2 * time.Second
 )
 
+const testRecord = "."
+
 type upstreamClient interface {
-	exchange(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 {
@@ -76,11 +79,18 @@ func (u *upstreamResolverBase) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 	}
 
 	for _, upstream := range u.upstreamServers {
+		var rm *dns.Msg
+		var t time.Duration
+		var err error
 
-		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 err == context.DeadlineExceeded || isTimeout(err) {
+			if errors.Is(err, context.DeadlineExceeded) || isTimeout(err) {
 				log.WithError(err).WithField("upstream", upstream).
 					Warn("got an error while connecting to upstream")
 				continue
@@ -134,13 +144,49 @@ func (u *upstreamResolverBase) checkUpstreamFails() {
 	case <-u.ctx.Done():
 		return
 	default:
-		// 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()
-		}
+	}
+
+	u.disable()
+}
+
+// probeAvailability tests all upstream servers simultaneously and
+// disables the resolver if none work
+func (u *upstreamResolverBase) probeAvailability() {
+	u.mutex.Lock()
+	defer u.mutex.Unlock()
+
+	select {
+	case <-u.ctx.Done():
+		return
+	default:
+	}
+
+	var success bool
+	var mu sync.Mutex
+	var wg sync.WaitGroup
+
+	for _, upstream := range u.upstreamServers {
+		upstream := upstream
+
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			if err := u.testNameserver(upstream); err != nil {
+				log.Warnf("probing upstream nameserver %s: %s", upstream, err)
+				return
+			}
+
+			mu.Lock()
+			defer mu.Unlock()
+			success = true
+		}()
+	}
+
+	wg.Wait()
+
+	// didn't find a working upstream server, let's disable and try later
+	if !success {
+		u.disable()
 	}
 }
 
@@ -156,8 +202,6 @@ func (u *upstreamResolverBase) waitUntilResponse() {
 		Clock:               backoff.SystemClock,
 	}
 
-	r := new(dns.Msg).SetQuestion("netbird.io.", dns.TypeA)
-
 	operation := func() error {
 		select {
 		case <-u.ctx.Done():
@@ -165,17 +209,17 @@ func (u *upstreamResolverBase) waitUntilResponse() {
 		default:
 		}
 
-		var err error
 		for _, upstream := range u.upstreamServers {
-			_, _, err = u.upstreamClient.exchange(upstream, r)
-
-			if err == nil {
+			if err := u.testNameserver(upstream); err != nil {
+				log.Tracef("upstream check for %s: %s", upstream, err)
+			} else {
+				// at least one upstream server is available, stop probing
 				return nil
 			}
 		}
 
-		log.Tracef("checking connectivity with upstreams %s failed with error: %s. Retrying in %s", err, u.upstreamServers, exponentialBackOff.NextBackOff())
-		return fmt.Errorf("got an error from upstream check call")
+		log.Tracef("checking connectivity with upstreams %s failed. Retrying in %s", u.upstreamServers, exponentialBackOff.NextBackOff())
+		return fmt.Errorf("upstream check call error")
 	}
 
 	err := backoff.Retry(operation, exponentialBackOff)
@@ -200,3 +244,27 @@ func isTimeout(err error) bool {
 	}
 	return false
 }
+
+func (u *upstreamResolverBase) disable() {
+	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()
+	}
+}
+
+func (u *upstreamResolverBase) testNameserver(server string) error {
+	ctx, cancel := context.WithTimeout(u.ctx, probeTimeout)
+	defer cancel()
+
+	r := new(dns.Msg).SetQuestion(testRecord, dns.TypeSOA)
+
+	_, _, err := u.upstreamClient.exchange(ctx, server, r)
+	return err
+}

client/internal/dns/upstream_ios.go

@@ -40,30 +40,38 @@ func newUpstreamResolver(parentCTX context.Context, interfaceName string, ip net
 	return ios, nil
 }
 
-func (u *upstreamResolverIOS) exchange(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)
 	}
+
+	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 = u.getClientPrivate(timeout)
 	}
 
+	// 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
 // This method is needed for iOS
-func (u *upstreamResolverIOS) getClientPrivate() *dns.Client {
+func (u *upstreamResolverIOS) getClientPrivate(dialTimeout time.Duration) *dns.Client {
 	dialer := &net.Dialer{
 		LocalAddr: &net.UDPAddr{
 			IP:   u.lIP,
 			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) {

client/internal/dns/upstream_nonios.go

@@ -23,10 +23,7 @@ func newUpstreamResolver(parentCTX context.Context, interfaceName string, ip net
 	return nonIOS, nil
 }
 
-func (u *upstreamResolverNonIOS) exchange(upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
+func (u *upstreamResolverNonIOS) exchange(ctx context.Context, upstream string, r *dns.Msg) (rm *dns.Msg, t time.Duration, err error) {
 	upstreamExchangeClient := &dns.Client{}
-	ctx, cancel := context.WithTimeout(u.ctx, u.upstreamTimeout)
-	rm, t, err = upstreamExchangeClient.ExchangeContext(ctx, r, upstream)
-	cancel()
-	return rm, t, err
+	return upstreamExchangeClient.ExchangeContext(ctx, r, upstream)
 }

client/internal/dns/upstream_test.go

@@ -105,8 +105,8 @@ type mockUpstreamResolver struct {
 	err error
 }
 
-// ExchangeContext mock implementation of ExchangeContext from upstreamResolver
-func (c mockUpstreamResolver) exchange(upstream string, r *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
 }
 

client/internal/dns/wgiface.go

@@ -11,4 +11,5 @@ type WGIface interface {
 	IsUserspaceBind() bool
 	GetFilter() iface.PacketFilter
 	GetDevice() *iface.DeviceWrapper
+	GetStats(peerKey string) (iface.WGStats, error)
 }

client/internal/dns/wgiface_windows.go

@@ -9,5 +9,6 @@ type WGIface interface {
 	IsUserspaceBind() bool
 	GetFilter() iface.PacketFilter
 	GetDevice() *iface.DeviceWrapper
+	GetStats(peerKey string) (iface.WGStats, error)
 	GetInterfaceGUIDString() (string, error)
 }

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

client/internal/engine.go

@@ -22,6 +22,7 @@ import (
 	"github.com/netbirdio/netbird/client/internal/acl"
 	"github.com/netbirdio/netbird/client/internal/dns"
 	"github.com/netbirdio/netbird/client/internal/peer"
+	"github.com/netbirdio/netbird/client/internal/relay"
 	"github.com/netbirdio/netbird/client/internal/rosenpass"
 	"github.com/netbirdio/netbird/client/internal/routemanager"
 	"github.com/netbirdio/netbird/client/internal/wgproxy"
@@ -78,7 +79,10 @@ type EngineConfig struct {
 
 	CustomDNSAddress string
 
-	RosenpassEnabled bool
+	RosenpassEnabled    bool
+	RosenpassPermissive bool
+
+	ServerSSHAllowed bool
 }
 
 // Engine is a mechanism responsible for reacting on Signal and Management stream events and managing connections to the remote peers.
@@ -125,6 +129,11 @@ type Engine struct {
 	acl          acl.Manager
 
 	dnsServer dns.Server
+
+	mgmProbe    *Probe
+	signalProbe *Probe
+	relayProbe  *Probe
+	wgProbe     *Probe
 }
 
 // Peer is an instance of the Connection Peer
@@ -135,11 +144,43 @@ type Peer struct {
 
 // NewEngine creates a new Connection Engine
 func NewEngine(
-	ctx context.Context, cancel context.CancelFunc,
-	signalClient signal.Client, mgmClient mgm.Client,
-	config *EngineConfig, mobileDep MobileDependency, statusRecorder *peer.Status,
+	ctx context.Context,
+	cancel context.CancelFunc,
+	signalClient signal.Client,
+	mgmClient mgm.Client,
+	config *EngineConfig,
+	mobileDep MobileDependency,
+	statusRecorder *peer.Status,
 ) *Engine {
+	return NewEngineWithProbes(
+		ctx,
+		cancel,
+		signalClient,
+		mgmClient,
+		config,
+		mobileDep,
+		statusRecorder,
+		nil,
+		nil,
+		nil,
+		nil,
+	)
+}
 
+// NewEngineWithProbes creates a new Connection Engine with probes attached
+func NewEngineWithProbes(
+	ctx context.Context,
+	cancel context.CancelFunc,
+	signalClient signal.Client,
+	mgmClient mgm.Client,
+	config *EngineConfig,
+	mobileDep MobileDependency,
+	statusRecorder *peer.Status,
+	mgmProbe *Probe,
+	signalProbe *Probe,
+	relayProbe *Probe,
+	wgProbe *Probe,
+) *Engine {
 	return &Engine{
 		ctx:            ctx,
 		cancel:         cancel,
@@ -155,6 +196,10 @@ func NewEngine(
 		sshServerFunc:  nbssh.DefaultSSHServer,
 		statusRecorder: statusRecorder,
 		wgProxyFactory: wgproxy.NewFactory(config.WgPort),
+		mgmProbe:       mgmProbe,
+		signalProbe:    signalProbe,
+		relayProbe:     relayProbe,
+		wgProbe:        wgProbe,
 	}
 }
 
@@ -192,6 +237,11 @@ func (e *Engine) Start() error {
 
 	if e.config.RosenpassEnabled {
 		log.Infof("rosenpass is enabled")
+		if e.config.RosenpassPermissive {
+			log.Infof("running rosenpass in permissive mode")
+		} else {
+			log.Infof("running rosenpass in strict mode")
+		}
 		e.rpManager, err = rosenpass.NewManager(e.config.PreSharedKey, e.config.WgIfaceName)
 		if err != nil {
 			return err
@@ -251,6 +301,7 @@ func (e *Engine) Start() error {
 
 	e.receiveSignalEvents()
 	e.receiveManagementEvents()
+	e.receiveProbeEvents()
 
 	return nil
 }
@@ -439,44 +490,52 @@ func isNil(server nbssh.Server) bool {
 }
 
 func (e *Engine) updateSSH(sshConf *mgmProto.SSHConfig) error {
-	if sshConf.GetSshEnabled() {
-		if runtime.GOOS == "windows" {
-			log.Warnf("running SSH server on Windows is not supported")
-			return nil
-		}
-		// start SSH server if it wasn't running
-		if isNil(e.sshServer) {
-			// nil sshServer means it has not yet been started
-			var err error
-			e.sshServer, err = e.sshServerFunc(e.config.SSHKey,
-				fmt.Sprintf("%s:%d", e.wgInterface.Address().IP.String(), nbssh.DefaultSSHPort))
-			if err != nil {
-				return err
+
+	if !e.config.ServerSSHAllowed {
+		log.Warnf("running SSH server is not permitted")
+		return nil
+	} else {
+
+		if sshConf.GetSshEnabled() {
+			if runtime.GOOS == "windows" {
+				log.Warnf("running SSH server on Windows is not supported")
+				return nil
 			}
-			go func() {
-				// blocking
-				err = e.sshServer.Start()
+			// start SSH server if it wasn't running
+			if isNil(e.sshServer) {
+				// nil sshServer means it has not yet been started
+				var err error
+				e.sshServer, err = e.sshServerFunc(e.config.SSHKey,
+					fmt.Sprintf("%s:%d", e.wgInterface.Address().IP.String(), nbssh.DefaultSSHPort))
 				if err != nil {
-					// will throw error when we stop it even if it is a graceful stop
-					log.Debugf("stopped SSH server with error %v", err)
+					return err
 				}
-				e.syncMsgMux.Lock()
-				defer e.syncMsgMux.Unlock()
-				e.sshServer = nil
-				log.Infof("stopped SSH server")
-			}()
-		} else {
-			log.Debugf("SSH server is already running")
+				go func() {
+					// blocking
+					err = e.sshServer.Start()
+					if err != nil {
+						// will throw error when we stop it even if it is a graceful stop
+						log.Debugf("stopped SSH server with error %v", err)
+					}
+					e.syncMsgMux.Lock()
+					defer e.syncMsgMux.Unlock()
+					e.sshServer = nil
+					log.Infof("stopped SSH server")
+				}()
+			} else {
+				log.Debugf("SSH server is already running")
+			}
+		} else if !isNil(e.sshServer) {
+			// Disable SSH server request, so stop it if it was running
+			err := e.sshServer.Stop()
+			if err != nil {
+				log.Warnf("failed to stop SSH server %v", err)
+			}
+			e.sshServer = nil
 		}
-	} else if !isNil(e.sshServer) {
-		// Disable SSH server request, so stop it if it was running
-		err := e.sshServer.Stop()
-		if err != nil {
-			log.Warnf("failed to stop SSH server %v", err)
-		}
-		e.sshServer = nil
+		return nil
+
 	}
-	return nil
 }
 
 func (e *Engine) updateConfig(conf *mgmProto.PeerConfig) error {
@@ -512,9 +571,7 @@ func (e *Engine) updateConfig(conf *mgmProto.PeerConfig) error {
 // E.g. when a new peer has been registered and we are allowed to connect to it.
 func (e *Engine) receiveManagementEvents() {
 	go func() {
-		err := e.mgmClient.Sync(func(update *mgmProto.SyncResponse) error {
-			return e.handleSync(update)
-		})
+		err := e.mgmClient.Sync(e.handleSync)
 		if err != nil {
 			// happens if management is unavailable for a long time.
 			// We want to cancel the operation of the whole client
@@ -641,6 +698,10 @@ func (e *Engine) updateNetworkMap(networkMap *mgmProto.NetworkMap) error {
 		log.Errorf("failed to update dns server, err: %v", err)
 	}
 
+	// Test received (upstream) servers for availability right away instead of upon usage.
+	// If no server of a server group responds this will disable the respective handler and retry later.
+	e.dnsServer.ProbeAvailability()
+
 	if e.acl != nil {
 		e.acl.ApplyFiltering(networkMap)
 	}
@@ -815,7 +876,7 @@ func (e *Engine) createPeerConn(pubKey string, allowedIPs string) (*peer.Conn, e
 		PreSharedKey: e.config.PreSharedKey,
 	}
 
-	if e.config.RosenpassEnabled {
+	if e.config.RosenpassEnabled && !e.config.RosenpassPermissive {
 		lk := []byte(e.config.WgPrivateKey.PublicKey().String())
 		rk := []byte(wgConfig.RemoteKey)
 		var keyInput []byte
@@ -1035,6 +1096,11 @@ func (e *Engine) close() {
 		log.Errorf("failed closing ebpf proxy: %s", err)
 	}
 
+	// stop/restore DNS first so dbus and friends don't complain because of a missing interface
+	if e.dnsServer != nil {
+		e.dnsServer.Stop()
+	}
+
 	log.Debugf("removing Netbird interface %s", e.config.WgIfaceName)
 	if e.wgInterface != nil {
 		if err := e.wgInterface.Close(); err != nil {
@@ -1053,10 +1119,6 @@ func (e *Engine) close() {
 		e.routeManager.Stop()
 	}
 
-	if e.dnsServer != nil {
-		e.dnsServer.Stop()
-	}
-
 	if e.firewall != nil {
 		err := e.firewall.Reset()
 		if err != nil {
@@ -1175,3 +1237,69 @@ func (e *Engine) getRosenpassAddr() string {
 	}
 	return ""
 }
+
+func (e *Engine) receiveProbeEvents() {
+	if e.signalProbe != nil {
+		go e.signalProbe.Receive(e.ctx, func() bool {
+			healthy := e.signal.IsHealthy()
+			log.Debugf("received signal probe request, healthy: %t", healthy)
+			return healthy
+		})
+	}
+
+	if e.mgmProbe != nil {
+		go e.mgmProbe.Receive(e.ctx, func() bool {
+			healthy := e.mgmClient.IsHealthy()
+			log.Debugf("received management probe request, healthy: %t", healthy)
+			return healthy
+		})
+	}
+
+	if e.relayProbe != nil {
+		go e.relayProbe.Receive(e.ctx, func() bool {
+			healthy := true
+
+			results := append(e.probeSTUNs(), e.probeTURNs()...)
+			e.statusRecorder.UpdateRelayStates(results)
+
+			// A single failed server will result in a "failed" probe
+			for _, res := range results {
+				if res.Err != nil {
+					healthy = false
+					break
+				}
+			}
+
+			log.Debugf("received relay probe request, healthy: %t", healthy)
+			return healthy
+		})
+	}
+
+	if e.wgProbe != nil {
+		go e.wgProbe.Receive(e.ctx, func() bool {
+			log.Debug("received wg probe request")
+
+			for _, peer := range e.peerConns {
+				key := peer.GetKey()
+				wgStats, err := peer.GetConf().WgConfig.WgInterface.GetStats(key)
+				if err != nil {
+					log.Debugf("failed to get wg stats for peer %s: %s", key, err)
+				}
+				// wgStats could be zero value, in which case we just reset the stats
+				if err := e.statusRecorder.UpdateWireGuardPeerState(key, wgStats); err != nil {
+					log.Debugf("failed to update wg stats for peer %s: %s", key, err)
+				}
+			}
+
+			return true
+		})
+	}
+}
+
+func (e *Engine) probeSTUNs() []relay.ProbeResult {
+	return relay.ProbeAll(e.ctx, relay.ProbeSTUN, e.STUNs)
+}
+
+func (e *Engine) probeTURNs() []relay.ProbeResult {
+	return relay.ProbeAll(e.ctx, relay.ProbeTURN, e.TURNs)
+}

client/internal/engine_test.go

@@ -74,6 +74,7 @@ func TestEngine_SSH(t *testing.T) {
 		WgAddr:       "100.64.0.1/24",
 		WgPrivateKey: key,
 		WgPort:       33100,
+		ServerSSHAllowed: true,
 	}, MobileDependency{}, peer.NewRecorder("https://mgm"))
 
 	engine.dnsServer = &dns.MockServer{
@@ -1049,8 +1050,7 @@ func startManagement(dataDir string) (*grpc.Server, string, error) {
 	if err != nil {
 		return nil, "", err
 	}
-	accountManager, err := server.BuildManager(store, peersUpdateManager, nil, "", "",
-		eventStore, false)
+	accountManager, err := server.BuildManager(store, peersUpdateManager, nil, "", "", eventStore, nil, false)
 	if err != nil {
 		return nil, "", err
 	}

client/internal/peer/conn.go

@@ -130,8 +130,9 @@ type Conn struct {
 	remoteModeCh chan ModeMessage
 	meta         meta
 
-	adapter       iface.TunAdapter
-	iFaceDiscover stdnet.ExternalIFaceDiscover
+	adapter        iface.TunAdapter
+	iFaceDiscover  stdnet.ExternalIFaceDiscover
+	sentExtraSrflx bool
 }
 
 // meta holds meta information about a connection
@@ -406,14 +407,21 @@ func (conn *Conn) configureConnection(remoteConn net.Conn, remoteWgPort int, rem
 	}
 
 	conn.status = StatusConnected
+	rosenpassEnabled := false
+	if remoteRosenpassPubKey != nil {
+		rosenpassEnabled = true
+	}
 
 	peerState := State{
-		PubKey:                 conn.config.Key,
-		ConnStatus:             conn.status,
-		ConnStatusUpdate:       time.Now(),
-		LocalIceCandidateType:  pair.Local.Type().String(),
-		RemoteIceCandidateType: pair.Remote.Type().String(),
-		Direct:                 !isRelayCandidate(pair.Local),
+		PubKey:                     conn.config.Key,
+		ConnStatus:                 conn.status,
+		ConnStatusUpdate:           time.Now(),
+		LocalIceCandidateType:      pair.Local.Type().String(),
+		RemoteIceCandidateType:     pair.Remote.Type().String(),
+		LocalIceCandidateEndpoint:  fmt.Sprintf("%s:%d", pair.Local.Address(), pair.Local.Port()),
+		RemoteIceCandidateEndpoint: fmt.Sprintf("%s:%d", pair.Remote.Address(), pair.Local.Port()),
+		Direct:                     !isRelayCandidate(pair.Local),
+		RosenpassEnabled:           rosenpassEnabled,
 	}
 	if pair.Local.Type() == ice.CandidateTypeRelay || pair.Remote.Type() == ice.CandidateTypeRelay {
 		peerState.Relayed = true
@@ -462,6 +470,8 @@ func (conn *Conn) cleanup() error {
 	conn.mu.Lock()
 	defer conn.mu.Unlock()
 
+	conn.sentExtraSrflx = false
+
 	var err1, err2, err3 error
 	if conn.agent != nil {
 		err1 = conn.agent.Close()
@@ -500,6 +510,9 @@ func (conn *Conn) cleanup() error {
 		// todo rethink status updates
 		log.Debugf("error while updating peer's %s state, err: %v", conn.config.Key, err)
 	}
+	if err := conn.statusRecorder.UpdateWireGuardPeerState(conn.config.Key, iface.WGStats{}); err != nil {
+		log.Debugf("failed to reset wireguard stats for peer %s: %s", conn.config.Key, err)
+	}
 
 	log.Debugf("cleaned up connection to peer %s", conn.config.Key)
 	if err1 != nil {
@@ -552,6 +565,30 @@ func (conn *Conn) onICECandidate(candidate ice.Candidate) {
 			if err != nil {
 				log.Errorf("failed signaling candidate to the remote peer %s %s", conn.config.Key, err)
 			}
+
+			// sends an extra server reflexive candidate to the remote peer with our related port (usually the wireguard port)
+			// this is useful when network has an existing port forwarding rule for the wireguard port and this peer
+			if !conn.sentExtraSrflx && candidate.Type() == ice.CandidateTypeServerReflexive && candidate.Port() != candidate.RelatedAddress().Port {
+				relatedAdd := candidate.RelatedAddress()
+				extraSrflx, err := ice.NewCandidateServerReflexive(&ice.CandidateServerReflexiveConfig{
+					Network:   candidate.NetworkType().String(),
+					Address:   candidate.Address(),
+					Port:      relatedAdd.Port,
+					Component: candidate.Component(),
+					RelAddr:   relatedAdd.Address,
+					RelPort:   relatedAdd.Port,
+				})
+				if err != nil {
+					log.Errorf("failed creating extra server reflexive candidate %s", err)
+					return
+				}
+				err = conn.signalCandidate(extraSrflx)
+				if err != nil {
+					log.Errorf("failed signaling the extra server reflexive candidate to the remote peer %s: %s", conn.config.Key, err)
+					return
+				}
+				conn.sentExtraSrflx = true
+			}
 		}()
 	}
 }

client/internal/peer/status.go

@@ -4,19 +4,31 @@ import (
 	"errors"
 	"sync"
 	"time"
+
+	"google.golang.org/grpc/codes"
+	gstatus "google.golang.org/grpc/status"
+
+	"github.com/netbirdio/netbird/client/internal/relay"
+	"github.com/netbirdio/netbird/iface"
 )
 
 // State contains the latest state of a peer
 type State struct {
-	IP                     string
-	PubKey                 string
-	FQDN                   string
-	ConnStatus             ConnStatus
-	ConnStatusUpdate       time.Time
-	Relayed                bool
-	Direct                 bool
-	LocalIceCandidateType  string
-	RemoteIceCandidateType string
+	IP                         string
+	PubKey                     string
+	FQDN                       string
+	ConnStatus                 ConnStatus
+	ConnStatusUpdate           time.Time
+	Relayed                    bool
+	Direct                     bool
+	LocalIceCandidateType      string
+	RemoteIceCandidateType     string
+	LocalIceCandidateEndpoint  string
+	RemoteIceCandidateEndpoint string
+	LastWireguardHandshake     time.Time
+	BytesTx                    int64
+	BytesRx                    int64
+	RosenpassEnabled           bool
 }
 
 // LocalPeerState contains the latest state of the local peer
@@ -31,12 +43,20 @@ type LocalPeerState struct {
 type SignalState struct {
 	URL       string
 	Connected bool
+	Error     error
 }
 
 // ManagementState contains the latest state of a management connection
 type ManagementState struct {
 	URL       string
 	Connected bool
+	Error     error
+}
+
+// RosenpassState contains the latest state of the Rosenpass configuration
+type RosenpassState struct {
+	Enabled    bool
+	Permissive bool
 }
 
 // FullStatus contains the full state held by the Status instance
@@ -45,20 +65,27 @@ type FullStatus struct {
 	ManagementState ManagementState
 	SignalState     SignalState
 	LocalPeerState  LocalPeerState
+	RosenpassState  RosenpassState
+	Relays          []relay.ProbeResult
 }
 
-// Status holds a state of peers, signal and management connections
+// Status holds a state of peers, signal, management connections and relays
 type Status struct {
-	mux             sync.Mutex
-	peers           map[string]State
-	changeNotify    map[string]chan struct{}
-	signalState     bool
-	managementState bool
-	localPeer       LocalPeerState
-	offlinePeers    []State
-	mgmAddress      string
-	signalAddress   string
-	notifier        *notifier
+	mux                 sync.Mutex
+	peers               map[string]State
+	changeNotify        map[string]chan struct{}
+	signalState         bool
+	signalError         error
+	managementState     bool
+	managementError     error
+	relayStates         []relay.ProbeResult
+	localPeer           LocalPeerState
+	offlinePeers        []State
+	mgmAddress          string
+	signalAddress       string
+	notifier            *notifier
+	rosenpassEnabled    bool
+	rosenpassPermissive bool
 
 	// To reduce the number of notification invocation this bool will be true when need to call the notification
 	// Some Peer actions mostly used by in a batch when the network map has been synchronized. In these type of events
@@ -156,6 +183,9 @@ func (d *Status) UpdatePeerState(receivedState State) error {
 		peerState.Relayed = receivedState.Relayed
 		peerState.LocalIceCandidateType = receivedState.LocalIceCandidateType
 		peerState.RemoteIceCandidateType = receivedState.RemoteIceCandidateType
+		peerState.LocalIceCandidateEndpoint = receivedState.LocalIceCandidateEndpoint
+		peerState.RemoteIceCandidateEndpoint = receivedState.RemoteIceCandidateEndpoint
+		peerState.RosenpassEnabled = receivedState.RosenpassEnabled
 	}
 
 	d.peers[receivedState.PubKey] = peerState
@@ -174,6 +204,25 @@ func (d *Status) UpdatePeerState(receivedState State) error {
 	return nil
 }
 
+// UpdateWireGuardPeerState updates the WireGuard bits of the peer state
+func (d *Status) UpdateWireGuardPeerState(pubKey string, wgStats iface.WGStats) error {
+	d.mux.Lock()
+	defer d.mux.Unlock()
+
+	peerState, ok := d.peers[pubKey]
+	if !ok {
+		return errors.New("peer doesn't exist")
+	}
+
+	peerState.LastWireguardHandshake = wgStats.LastHandshake
+	peerState.BytesRx = wgStats.RxBytes
+	peerState.BytesTx = wgStats.TxBytes
+
+	d.peers[pubKey] = peerState
+
+	return nil
+}
+
 func shouldSkipNotify(received, curr State) bool {
 	switch {
 	case received.ConnStatus == StatusConnecting:
@@ -248,12 +297,13 @@ func (d *Status) CleanLocalPeerState() {
 }
 
 // MarkManagementDisconnected sets ManagementState to disconnected
-func (d *Status) MarkManagementDisconnected() {
+func (d *Status) MarkManagementDisconnected(err error) {
 	d.mux.Lock()
 	defer d.mux.Unlock()
 	defer d.onConnectionChanged()
 
 	d.managementState = false
+	d.managementError = err
 }
 
 // MarkManagementConnected sets ManagementState to connected
@@ -263,6 +313,7 @@ func (d *Status) MarkManagementConnected() {
 	defer d.onConnectionChanged()
 
 	d.managementState = true
+	d.managementError = nil
 }
 
 // UpdateSignalAddress update the address of the signal server
@@ -279,13 +330,22 @@ func (d *Status) UpdateManagementAddress(mgmAddress string) {
 	d.mgmAddress = mgmAddress
 }
 
+// UpdateRosenpass update the Rosenpass configuration
+func (d *Status) UpdateRosenpass(rosenpassEnabled, rosenpassPermissive bool) {
+	d.mux.Lock()
+	defer d.mux.Unlock()
+	d.rosenpassPermissive = rosenpassPermissive
+	d.rosenpassEnabled = rosenpassEnabled
+}
+
 // MarkSignalDisconnected sets SignalState to disconnected
-func (d *Status) MarkSignalDisconnected() {
+func (d *Status) MarkSignalDisconnected(err error) {
 	d.mux.Lock()
 	defer d.mux.Unlock()
 	defer d.onConnectionChanged()
 
 	d.signalState = false
+	d.signalError = err
 }
 
 // MarkSignalConnected sets SignalState to connected
@@ -295,6 +355,58 @@ func (d *Status) MarkSignalConnected() {
 	defer d.onConnectionChanged()
 
 	d.signalState = true
+	d.signalError = nil
+}
+
+func (d *Status) UpdateRelayStates(relayResults []relay.ProbeResult) {
+	d.mux.Lock()
+	defer d.mux.Unlock()
+	d.relayStates = relayResults
+}
+
+func (d *Status) GetRosenpassState() RosenpassState {
+	return RosenpassState{
+		d.rosenpassEnabled,
+		d.rosenpassPermissive,
+	}
+}
+
+func (d *Status) GetManagementState() ManagementState {
+	return ManagementState{
+		d.mgmAddress,
+		d.managementState,
+		d.managementError,
+	}
+}
+
+// IsLoginRequired determines if a peer's login has expired.
+func (d *Status) IsLoginRequired() bool {
+	d.mux.Lock()
+	defer d.mux.Unlock()
+
+	// if peer is connected to the management then login is not expired
+	if d.managementState {
+		return false
+	}
+
+	s, ok := gstatus.FromError(d.managementError)
+	if ok && (s.Code() == codes.InvalidArgument || s.Code() == codes.PermissionDenied) {
+		return true
+
+	}
+	return false
+}
+
+func (d *Status) GetSignalState() SignalState {
+	return SignalState{
+		d.signalAddress,
+		d.signalState,
+		d.signalError,
+	}
+}
+
+func (d *Status) GetRelayStates() []relay.ProbeResult {
+	return d.relayStates
 }
 
 // GetFullStatus gets full status
@@ -303,15 +415,11 @@ func (d *Status) GetFullStatus() FullStatus {
 	defer d.mux.Unlock()
 
 	fullStatus := FullStatus{
-		ManagementState: ManagementState{
-			d.mgmAddress,
-			d.managementState,
-		},
-		SignalState: SignalState{
-			d.signalAddress,
-			d.signalState,
-		},
-		LocalPeerState: d.localPeer,
+		ManagementState: d.GetManagementState(),
+		SignalState:     d.GetSignalState(),
+		LocalPeerState:  d.localPeer,
+		Relays:          d.GetRelayStates(),
+		RosenpassState:  d.GetRosenpassState(),
 	}
 
 	for _, status := range d.peers {

client/internal/peer/status_test.go

@@ -1,6 +1,7 @@
 package peer
 
 import (
+	"errors"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -152,9 +153,10 @@ func TestUpdateSignalState(t *testing.T) {
 		name      string
 		connected bool
 		want      bool
+		err       error
 	}{
-		{"should mark as connected", true, true},
-		{"should mark as disconnected", false, false},
+		{"should mark as connected", true, true, nil},
+		{"should mark as disconnected", false, false, errors.New("test")},
 	}
 
 	status := NewRecorder("https://mgm")
@@ -165,9 +167,10 @@ func TestUpdateSignalState(t *testing.T) {
 			if test.connected {
 				status.MarkSignalConnected()
 			} else {
-				status.MarkSignalDisconnected()
+				status.MarkSignalDisconnected(test.err)
 			}
 			assert.Equal(t, test.want, status.signalState, "signal status should be equal")
+			assert.Equal(t, test.err, status.signalError)
 		})
 	}
 }
@@ -178,9 +181,10 @@ func TestUpdateManagementState(t *testing.T) {
 		name      string
 		connected bool
 		want      bool
+		err       error
 	}{
-		{"should mark as connected", true, true},
-		{"should mark as disconnected", false, false},
+		{"should mark as connected", true, true, nil},
+		{"should mark as disconnected", false, false, errors.New("test")},
 	}
 
 	status := NewRecorder(url)
@@ -190,9 +194,10 @@ func TestUpdateManagementState(t *testing.T) {
 			if test.connected {
 				status.MarkManagementConnected()
 			} else {
-				status.MarkManagementDisconnected()
+				status.MarkManagementDisconnected(test.err)
 			}
 			assert.Equal(t, test.want, status.managementState, "signalState status should be equal")
+			assert.Equal(t, test.err, status.managementError)
 		})
 	}
 }

client/internal/probe.go

@@ -0,0 +1,51 @@
+package internal
+
+import "context"
+
+// Probe allows to run on-demand callbacks from different code locations.
+// Pass the probe to a receiving and a sending end. The receiving end starts listening
+// to requests with Receive and executes a callback when the sending end requests it
+// by calling Probe.
+type Probe struct {
+	request chan struct{}
+	result  chan bool
+	ready   bool
+}
+
+// NewProbe returns a new initialized probe.
+func NewProbe() *Probe {
+	return &Probe{
+		request: make(chan struct{}),
+		result:  make(chan bool),
+	}
+}
+
+// Probe requests the callback to be run and returns a bool indicating success.
+// It always returns true as long as the receiver is not ready.
+func (p *Probe) Probe() bool {
+	if !p.ready {
+		return true
+	}
+
+	p.request <- struct{}{}
+	return <-p.result
+}
+
+// Receive starts listening for probe requests. On such a request it runs the supplied
+// callback func which must return a bool indicating success.
+// Blocks until the passed context is cancelled.
+func (p *Probe) Receive(ctx context.Context, callback func() bool) {
+	p.ready = true
+	defer func() {
+		p.ready = false
+	}()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-p.request:
+			p.result <- callback()
+		}
+	}
+}

client/internal/relay/relay.go

@@ -0,0 +1,171 @@
+package relay
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/pion/stun/v2"
+	"github.com/pion/turn/v3"
+	log "github.com/sirupsen/logrus"
+)
+
+// ProbeResult holds the info about the result of a relay probe request
+type ProbeResult struct {
+	URI  *stun.URI
+	Err  error
+	Addr string
+}
+
+// ProbeSTUN tries binding to the given STUN uri and acquiring an address
+func ProbeSTUN(ctx context.Context, uri *stun.URI) (addr string, probeErr error) {
+	defer func() {
+		if probeErr != nil {
+			log.Debugf("stun probe error from %s: %s", uri, probeErr)
+		}
+	}()
+
+	client, err := stun.DialURI(uri, &stun.DialConfig{})
+	if err != nil {
+		probeErr = fmt.Errorf("dial: %w", err)
+		return
+	}
+
+	defer func() {
+		if err := client.Close(); err != nil && probeErr == nil {
+			probeErr = fmt.Errorf("close: %w", err)
+		}
+	}()
+
+	done := make(chan struct{})
+	if err = client.Start(stun.MustBuild(stun.TransactionID, stun.BindingRequest), func(res stun.Event) {
+		if res.Error != nil {
+			probeErr = fmt.Errorf("request: %w", err)
+			return
+		}
+
+		var xorAddr stun.XORMappedAddress
+		if getErr := xorAddr.GetFrom(res.Message); getErr != nil {
+			probeErr = fmt.Errorf("get xor addr: %w", err)
+			return
+		}
+
+		log.Debugf("stun probe received address from %s: %s", uri, xorAddr)
+		addr = xorAddr.String()
+
+		done <- struct{}{}
+	}); err != nil {
+		probeErr = fmt.Errorf("client: %w", err)
+		return
+	}
+
+	select {
+	case <-ctx.Done():
+		probeErr = fmt.Errorf("stun request: %w", ctx.Err())
+		return
+	case <-done:
+	}
+
+	return addr, nil
+}
+
+// ProbeTURN tries allocating a session from the given TURN URI
+func ProbeTURN(ctx context.Context, uri *stun.URI) (addr string, probeErr error) {
+	defer func() {
+		if probeErr != nil {
+			log.Debugf("turn probe error from %s: %s", uri, probeErr)
+		}
+	}()
+
+	turnServerAddr := fmt.Sprintf("%s:%d", uri.Host, uri.Port)
+
+	var conn net.PacketConn
+	switch uri.Proto {
+	case stun.ProtoTypeUDP:
+		var err error
+		conn, err = net.ListenPacket("udp", "")
+		if err != nil {
+			probeErr = fmt.Errorf("listen: %w", err)
+			return
+		}
+	case stun.ProtoTypeTCP:
+		dialer := net.Dialer{}
+		tcpConn, err := dialer.DialContext(ctx, "tcp", turnServerAddr)
+		if err != nil {
+			probeErr = fmt.Errorf("dial: %w", err)
+			return
+		}
+		conn = turn.NewSTUNConn(tcpConn)
+	default:
+		probeErr = fmt.Errorf("conn: unknown proto: %s", uri.Proto)
+		return
+	}
+
+	defer func() {
+		if err := conn.Close(); err != nil && probeErr == nil {
+			probeErr = fmt.Errorf("conn close: %w", err)
+		}
+	}()
+
+	cfg := &turn.ClientConfig{
+		STUNServerAddr: turnServerAddr,
+		TURNServerAddr: turnServerAddr,
+		Conn:           conn,
+		Username:       uri.Username,
+		Password:       uri.Password,
+	}
+	client, err := turn.NewClient(cfg)
+	if err != nil {
+		probeErr = fmt.Errorf("create client: %w", err)
+		return
+	}
+	defer client.Close()
+
+	if err := client.Listen(); err != nil {
+		probeErr = fmt.Errorf("client listen: %w", err)
+		return
+	}
+
+	relayConn, err := client.Allocate()
+	if err != nil {
+		probeErr = fmt.Errorf("allocate: %w", err)
+		return
+	}
+	defer func() {
+		if err := relayConn.Close(); err != nil && probeErr == nil {
+			probeErr = fmt.Errorf("close relay conn: %w", err)
+		}
+	}()
+
+	log.Debugf("turn probe relay address from %s: %s", uri, relayConn.LocalAddr())
+
+	return relayConn.LocalAddr().String(), nil
+}
+
+// ProbeAll probes all given servers asynchronously and returns the results
+func ProbeAll(
+	ctx context.Context,
+	fn func(ctx context.Context, uri *stun.URI) (addr string, probeErr error),
+	relays []*stun.URI,
+) []ProbeResult {
+	results := make([]ProbeResult, len(relays))
+
+	var wg sync.WaitGroup
+	for i, uri := range relays {
+		ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
+		defer cancel()
+
+		wg.Add(1)
+		go func(res *ProbeResult, stunURI *stun.URI) {
+			defer wg.Done()
+			res.URI = stunURI
+			res.Addr, res.Err = fn(ctx, stunURI)
+		}(&results[i], uri)
+	}
+
+	wg.Wait()
+
+	return results
+}

client/internal/session.go

@@ -0,0 +1,82 @@
+package internal
+
+import (
+	"context"
+	"os/exec"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/netbirdio/netbird/client/internal/peer"
+)
+
+type SessionWatcher struct {
+	ctx   context.Context
+	mutex sync.Mutex
+
+	peerStatusRecorder *peer.Status
+	watchTicker        *time.Ticker
+
+	sendNotification bool
+	onExpireListener func()
+}
+
+// NewSessionWatcher creates a new instance of SessionWatcher.
+func NewSessionWatcher(ctx context.Context, peerStatusRecorder *peer.Status) *SessionWatcher {
+	s := &SessionWatcher{
+		ctx:                ctx,
+		peerStatusRecorder: peerStatusRecorder,
+		watchTicker:        time.NewTicker(2 * time.Second),
+	}
+	go s.startWatcher()
+	return s
+}
+
+// SetOnExpireListener sets the callback func to be called when the session expires.
+func (s *SessionWatcher) SetOnExpireListener(onExpire func()) {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+	s.onExpireListener = onExpire
+}
+
+// startWatcher continuously checks if the session requires login and
+// calls the onExpireListener if login is required.
+func (s *SessionWatcher) startWatcher() {
+	for {
+		select {
+		case <-s.ctx.Done():
+			s.watchTicker.Stop()
+			return
+		case <-s.watchTicker.C:
+			managementState := s.peerStatusRecorder.GetManagementState()
+			if managementState.Connected {
+				s.sendNotification = true
+			}
+
+			isLoginRequired := s.peerStatusRecorder.IsLoginRequired()
+			if isLoginRequired && s.sendNotification && s.onExpireListener != nil {
+				s.mutex.Lock()
+				s.onExpireListener()
+				s.sendNotification = false
+				s.mutex.Unlock()
+			}
+		}
+	}
+}
+
+// CheckUIApp checks whether UI application is running.
+func CheckUIApp() bool {
+	cmd := exec.Command("ps", "-ef")
+	output, err := cmd.Output()
+	if err != nil {
+		return false
+	}
+
+	lines := strings.Split(string(output), "\n")
+	for _, line := range lines {
+		if strings.Contains(line, "netbird-ui") && !strings.Contains(line, "grep") {
+			return true
+		}
+	}
+	return false
+}

client/ios/NetBirdSDK/client.go

@@ -82,6 +82,7 @@ func (c *Client) Run(fd int32, interfaceName string) error {
 		return err
 	}
 	c.recorder.UpdateManagementAddress(cfg.ManagementURL.String())
+	c.recorder.UpdateRosenpass(cfg.RosenpassEnabled, cfg.RosenpassPermissive)
 
 	var ctx context.Context
 	//nolint

client/proto/daemon.pb.go

@@ -1,16 +1,16 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.26.0
-// 	protoc        v3.21.9
+// 	protoc        v3.12.4
 // source: daemon.proto
 
 package proto
 
 import (
+	_ "github.com/golang/protobuf/protoc-gen-go/descriptor"
+	timestamp "github.com/golang/protobuf/ptypes/timestamp"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	_ "google.golang.org/protobuf/types/descriptorpb"
-	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
 	reflect "reflect"
 	sync "sync"
 )
@@ -29,7 +29,10 @@ type LoginRequest struct {
 
 	// setupKey wiretrustee setup key.
 	SetupKey string `protobuf:"bytes,1,opt,name=setupKey,proto3" json:"setupKey,omitempty"`
-	// preSharedKey for wireguard setup.
+	// This is the old PreSharedKey field which will be deprecated in favor of optionalPreSharedKey field that is defined as optional
+	// to allow clearing of preshared key while being able to persist in the config file.
+	//
+	// Deprecated: Do not use.
 	PreSharedKey string `protobuf:"bytes,2,opt,name=preSharedKey,proto3" json:"preSharedKey,omitempty"`
 	// managementUrl to authenticate.
 	ManagementUrl string `protobuf:"bytes,3,opt,name=managementUrl,proto3" json:"managementUrl,omitempty"`
@@ -47,6 +50,10 @@ type LoginRequest struct {
 	RosenpassEnabled     *bool   `protobuf:"varint,10,opt,name=rosenpassEnabled,proto3,oneof" json:"rosenpassEnabled,omitempty"`
 	InterfaceName        *string `protobuf:"bytes,11,opt,name=interfaceName,proto3,oneof" json:"interfaceName,omitempty"`
 	WireguardPort        *int64  `protobuf:"varint,12,opt,name=wireguardPort,proto3,oneof" json:"wireguardPort,omitempty"`
+	OptionalPreSharedKey *string `protobuf:"bytes,13,opt,name=optionalPreSharedKey,proto3,oneof" json:"optionalPreSharedKey,omitempty"`
+	DisableAutoConnect   *bool   `protobuf:"varint,14,opt,name=disableAutoConnect,proto3,oneof" json:"disableAutoConnect,omitempty"`
+	ServerSSHAllowed     *bool   `protobuf:"varint,15,opt,name=serverSSHAllowed,proto3,oneof" json:"serverSSHAllowed,omitempty"`
+	RosenpassPermissive  *bool   `protobuf:"varint,16,opt,name=rosenpassPermissive,proto3,oneof" json:"rosenpassPermissive,omitempty"`
 }
 
 func (x *LoginRequest) Reset() {
@@ -88,6 +95,7 @@ func (x *LoginRequest) GetSetupKey() string {
 	return ""
 }
 
+// Deprecated: Do not use.
 func (x *LoginRequest) GetPreSharedKey() string {
 	if x != nil {
 		return x.PreSharedKey
@@ -165,6 +173,34 @@ func (x *LoginRequest) GetWireguardPort() int64 {
 	return 0
 }
 
+func (x *LoginRequest) GetOptionalPreSharedKey() string {
+	if x != nil && x.OptionalPreSharedKey != nil {
+		return *x.OptionalPreSharedKey
+	}
+	return ""
+}
+
+func (x *LoginRequest) GetDisableAutoConnect() bool {
+	if x != nil && x.DisableAutoConnect != nil {
+		return *x.DisableAutoConnect
+	}
+	return false
+}
+
+func (x *LoginRequest) GetServerSSHAllowed() bool {
+	if x != nil && x.ServerSSHAllowed != nil {
+		return *x.ServerSSHAllowed
+	}
+	return false
+}
+
+func (x *LoginRequest) GetRosenpassPermissive() bool {
+	if x != nil && x.RosenpassPermissive != nil {
+		return *x.RosenpassPermissive
+	}
+	return false
+}
+
 type LoginResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -721,15 +757,21 @@ type PeerState struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	IP                     string                 `protobuf:"bytes,1,opt,name=IP,proto3" json:"IP,omitempty"`
-	PubKey                 string                 `protobuf:"bytes,2,opt,name=pubKey,proto3" json:"pubKey,omitempty"`
-	ConnStatus             string                 `protobuf:"bytes,3,opt,name=connStatus,proto3" json:"connStatus,omitempty"`
-	ConnStatusUpdate       *timestamppb.Timestamp `protobuf:"bytes,4,opt,name=connStatusUpdate,proto3" json:"connStatusUpdate,omitempty"`
-	Relayed                bool                   `protobuf:"varint,5,opt,name=relayed,proto3" json:"relayed,omitempty"`
-	Direct                 bool                   `protobuf:"varint,6,opt,name=direct,proto3" json:"direct,omitempty"`
-	LocalIceCandidateType  string                 `protobuf:"bytes,7,opt,name=localIceCandidateType,proto3" json:"localIceCandidateType,omitempty"`
-	RemoteIceCandidateType string                 `protobuf:"bytes,8,opt,name=remoteIceCandidateType,proto3" json:"remoteIceCandidateType,omitempty"`
-	Fqdn                   string                 `protobuf:"bytes,9,opt,name=fqdn,proto3" json:"fqdn,omitempty"`
+	IP                         string               `protobuf:"bytes,1,opt,name=IP,proto3" json:"IP,omitempty"`
+	PubKey                     string               `protobuf:"bytes,2,opt,name=pubKey,proto3" json:"pubKey,omitempty"`
+	ConnStatus                 string               `protobuf:"bytes,3,opt,name=connStatus,proto3" json:"connStatus,omitempty"`
+	ConnStatusUpdate           *timestamp.Timestamp `protobuf:"bytes,4,opt,name=connStatusUpdate,proto3" json:"connStatusUpdate,omitempty"`
+	Relayed                    bool                 `protobuf:"varint,5,opt,name=relayed,proto3" json:"relayed,omitempty"`
+	Direct                     bool                 `protobuf:"varint,6,opt,name=direct,proto3" json:"direct,omitempty"`
+	LocalIceCandidateType      string               `protobuf:"bytes,7,opt,name=localIceCandidateType,proto3" json:"localIceCandidateType,omitempty"`
+	RemoteIceCandidateType     string               `protobuf:"bytes,8,opt,name=remoteIceCandidateType,proto3" json:"remoteIceCandidateType,omitempty"`
+	Fqdn                       string               `protobuf:"bytes,9,opt,name=fqdn,proto3" json:"fqdn,omitempty"`
+	LocalIceCandidateEndpoint  string               `protobuf:"bytes,10,opt,name=localIceCandidateEndpoint,proto3" json:"localIceCandidateEndpoint,omitempty"`
+	RemoteIceCandidateEndpoint string               `protobuf:"bytes,11,opt,name=remoteIceCandidateEndpoint,proto3" json:"remoteIceCandidateEndpoint,omitempty"`
+	LastWireguardHandshake     *timestamp.Timestamp `protobuf:"bytes,12,opt,name=lastWireguardHandshake,proto3" json:"lastWireguardHandshake,omitempty"`
+	BytesRx                    int64                `protobuf:"varint,13,opt,name=bytesRx,proto3" json:"bytesRx,omitempty"`
+	BytesTx                    int64                `protobuf:"varint,14,opt,name=bytesTx,proto3" json:"bytesTx,omitempty"`
+	RosenpassEnabled           bool                 `protobuf:"varint,15,opt,name=rosenpassEnabled,proto3" json:"rosenpassEnabled,omitempty"`
 }
 
 func (x *PeerState) Reset() {
@@ -785,7 +827,7 @@ func (x *PeerState) GetConnStatus() string {
 	return ""
 }
 
-func (x *PeerState) GetConnStatusUpdate() *timestamppb.Timestamp {
+func (x *PeerState) GetConnStatusUpdate() *timestamp.Timestamp {
 	if x != nil {
 		return x.ConnStatusUpdate
 	}
@@ -827,16 +869,60 @@ func (x *PeerState) GetFqdn() string {
 	return ""
 }
 
+func (x *PeerState) GetLocalIceCandidateEndpoint() string {
+	if x != nil {
+		return x.LocalIceCandidateEndpoint
+	}
+	return ""
+}
+
+func (x *PeerState) GetRemoteIceCandidateEndpoint() string {
+	if x != nil {
+		return x.RemoteIceCandidateEndpoint
+	}
+	return ""
+}
+
+func (x *PeerState) GetLastWireguardHandshake() *timestamp.Timestamp {
+	if x != nil {
+		return x.LastWireguardHandshake
+	}
+	return nil
+}
+
+func (x *PeerState) GetBytesRx() int64 {
+	if x != nil {
+		return x.BytesRx
+	}
+	return 0
+}
+
+func (x *PeerState) GetBytesTx() int64 {
+	if x != nil {
+		return x.BytesTx
+	}
+	return 0
+}
+
+func (x *PeerState) GetRosenpassEnabled() bool {
+	if x != nil {
+		return x.RosenpassEnabled
+	}
+	return false
+}
+
 // LocalPeerState contains the latest state of the local peer
 type LocalPeerState struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	IP              string `protobuf:"bytes,1,opt,name=IP,proto3" json:"IP,omitempty"`
-	PubKey          string `protobuf:"bytes,2,opt,name=pubKey,proto3" json:"pubKey,omitempty"`
-	KernelInterface bool   `protobuf:"varint,3,opt,name=kernelInterface,proto3" json:"kernelInterface,omitempty"`
-	Fqdn            string `protobuf:"bytes,4,opt,name=fqdn,proto3" json:"fqdn,omitempty"`
+	IP                  string `protobuf:"bytes,1,opt,name=IP,proto3" json:"IP,omitempty"`
+	PubKey              string `protobuf:"bytes,2,opt,name=pubKey,proto3" json:"pubKey,omitempty"`
+	KernelInterface     bool   `protobuf:"varint,3,opt,name=kernelInterface,proto3" json:"kernelInterface,omitempty"`
+	Fqdn                string `protobuf:"bytes,4,opt,name=fqdn,proto3" json:"fqdn,omitempty"`
+	RosenpassEnabled    bool   `protobuf:"varint,5,opt,name=rosenpassEnabled,proto3" json:"rosenpassEnabled,omitempty"`
+	RosenpassPermissive bool   `protobuf:"varint,6,opt,name=rosenpassPermissive,proto3" json:"rosenpassPermissive,omitempty"`
 }
 
 func (x *LocalPeerState) Reset() {
@@ -899,6 +985,20 @@ func (x *LocalPeerState) GetFqdn() string {
 	return ""
 }
 
+func (x *LocalPeerState) GetRosenpassEnabled() bool {
+	if x != nil {
+		return x.RosenpassEnabled
+	}
+	return false
+}
+
+func (x *LocalPeerState) GetRosenpassPermissive() bool {
+	if x != nil {
+		return x.RosenpassPermissive
+	}
+	return false
+}
+
 // SignalState contains the latest state of a signal connection
 type SignalState struct {
 	state         protoimpl.MessageState
@@ -907,6 +1007,7 @@ type SignalState struct {
 
 	URL       string `protobuf:"bytes,1,opt,name=URL,proto3" json:"URL,omitempty"`
 	Connected bool   `protobuf:"varint,2,opt,name=connected,proto3" json:"connected,omitempty"`
+	Error     string `protobuf:"bytes,3,opt,name=error,proto3" json:"error,omitempty"`
 }
 
 func (x *SignalState) Reset() {
@@ -955,6 +1056,13 @@ func (x *SignalState) GetConnected() bool {
 	return false
 }
 
+func (x *SignalState) GetError() string {
+	if x != nil {
+		return x.Error
+	}
+	return ""
+}
+
 // ManagementState contains the latest state of a management connection
 type ManagementState struct {
 	state         protoimpl.MessageState
@@ -963,6 +1071,7 @@ type ManagementState struct {
 
 	URL       string `protobuf:"bytes,1,opt,name=URL,proto3" json:"URL,omitempty"`
 	Connected bool   `protobuf:"varint,2,opt,name=connected,proto3" json:"connected,omitempty"`
+	Error     string `protobuf:"bytes,3,opt,name=error,proto3" json:"error,omitempty"`
 }
 
 func (x *ManagementState) Reset() {
@@ -1011,6 +1120,77 @@ func (x *ManagementState) GetConnected() bool {
 	return false
 }
 
+func (x *ManagementState) GetError() string {
+	if x != nil {
+		return x.Error
+	}
+	return ""
+}
+
+// RelayState contains the latest state of the relay
+type RelayState struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	URI       string `protobuf:"bytes,1,opt,name=URI,proto3" json:"URI,omitempty"`
+	Available bool   `protobuf:"varint,2,opt,name=available,proto3" json:"available,omitempty"`
+	Error     string `protobuf:"bytes,3,opt,name=error,proto3" json:"error,omitempty"`
+}
+
+func (x *RelayState) Reset() {
+	*x = RelayState{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_daemon_proto_msgTypes[16]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *RelayState) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RelayState) ProtoMessage() {}
+
+func (x *RelayState) ProtoReflect() protoreflect.Message {
+	mi := &file_daemon_proto_msgTypes[16]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RelayState.ProtoReflect.Descriptor instead.
+func (*RelayState) Descriptor() ([]byte, []int) {
+	return file_daemon_proto_rawDescGZIP(), []int{16}
+}
+
+func (x *RelayState) GetURI() string {
+	if x != nil {
+		return x.URI
+	}
+	return ""
+}
+
+func (x *RelayState) GetAvailable() bool {
+	if x != nil {
+		return x.Available
+	}
+	return false
+}
+
+func (x *RelayState) GetError() string {
+	if x != nil {
+		return x.Error
+	}
+	return ""
+}
+
 // FullStatus contains the full state held by the Status instance
 type FullStatus struct {
 	state         protoimpl.MessageState
@@ -1021,12 +1201,13 @@ type FullStatus struct {
 	SignalState     *SignalState     `protobuf:"bytes,2,opt,name=signalState,proto3" json:"signalState,omitempty"`
 	LocalPeerState  *LocalPeerState  `protobuf:"bytes,3,opt,name=localPeerState,proto3" json:"localPeerState,omitempty"`
 	Peers           []*PeerState     `protobuf:"bytes,4,rep,name=peers,proto3" json:"peers,omitempty"`
+	Relays          []*RelayState    `protobuf:"bytes,5,rep,name=relays,proto3" json:"relays,omitempty"`
 }
 
 func (x *FullStatus) Reset() {
 	*x = FullStatus{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_daemon_proto_msgTypes[16]
+		mi := &file_daemon_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1039,7 +1220,7 @@ func (x *FullStatus) String() string {
 func (*FullStatus) ProtoMessage() {}
 
 func (x *FullStatus) ProtoReflect() protoreflect.Message {
-	mi := &file_daemon_proto_msgTypes[16]
+	mi := &file_daemon_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1052,7 +1233,7 @@ func (x *FullStatus) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FullStatus.ProtoReflect.Descriptor instead.
 func (*FullStatus) Descriptor() ([]byte, []int) {
-	return file_daemon_proto_rawDescGZIP(), []int{16}
+	return file_daemon_proto_rawDescGZIP(), []int{17}
 }
 
 func (x *FullStatus) GetManagementState() *ManagementState {
@@ -1083,6 +1264,13 @@ func (x *FullStatus) GetPeers() []*PeerState {
 	return nil
 }
 
+func (x *FullStatus) GetRelays() []*RelayState {
+	if x != nil {
+		return x.Relays
+	}
+	return nil
+}
+
 var File_daemon_proto protoreflect.FileDescriptor
 
 var file_daemon_proto_rawDesc = []byte{
@@ -1091,165 +1279,220 @@ var file_daemon_proto_rawDesc = []byte{
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+	0x65, 0x6d, 0x6f, 0x6e, 0x2e, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65,
+	0x73, 0x74, 0x1a, 0x16, 0x2e, 0x64, 0x61, 0x65, 0x6d, 0x6f, 0x6e, 0x2e, 0x53, 0x74, 0x61, 0x74,
+	0x75, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x33, 0x0a, 0x04,
+	0x44, 0x6f, 0x77, 0x6e, 0x12, 0x13, 0x2e, 0x64, 0x61, 0x65, 0x6d, 0x6f, 0x6e, 0x2e, 0x44, 0x6f,
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+	0x6f, 0x6e, 0x2e, 0x44, 0x6f, 0x77, 0x6e, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22,
+	0x00, 0x12, 0x42, 0x0a, 0x09, 0x47, 0x65, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x18,
+	0x2e, 0x64, 0x61, 0x65, 0x6d, 0x6f, 0x6e, 0x2e, 0x47, 0x65, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69,
+	0x67, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x19, 0x2e, 0x64, 0x61, 0x65, 0x6d, 0x6f,
+	0x6e, 0x2e, 0x47, 0x65, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x52, 0x65, 0x73, 0x70, 0x6f,
+	0x6e, 0x73, 0x65, 0x22, 0x00, 0x42, 0x08, 0x5a, 0x06, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -1264,51 +1507,54 @@ func file_daemon_proto_rawDescGZIP() []byte {
 	return file_daemon_proto_rawDescData
 }
 
-var file_daemon_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
+var file_daemon_proto_msgTypes = make([]protoimpl.MessageInfo, 18)
 var file_daemon_proto_goTypes = []interface{}{
-	(*LoginRequest)(nil),          // 0: daemon.LoginRequest
-	(*LoginResponse)(nil),         // 1: daemon.LoginResponse
-	(*WaitSSOLoginRequest)(nil),   // 2: daemon.WaitSSOLoginRequest
-	(*WaitSSOLoginResponse)(nil),  // 3: daemon.WaitSSOLoginResponse
-	(*UpRequest)(nil),             // 4: daemon.UpRequest
-	(*UpResponse)(nil),            // 5: daemon.UpResponse
-	(*StatusRequest)(nil),         // 6: daemon.StatusRequest
-	(*StatusResponse)(nil),        // 7: daemon.StatusResponse
-	(*DownRequest)(nil),           // 8: daemon.DownRequest
-	(*DownResponse)(nil),          // 9: daemon.DownResponse
-	(*GetConfigRequest)(nil),      // 10: daemon.GetConfigRequest
-	(*GetConfigResponse)(nil),     // 11: daemon.GetConfigResponse
-	(*PeerState)(nil),             // 12: daemon.PeerState
-	(*LocalPeerState)(nil),        // 13: daemon.LocalPeerState
-	(*SignalState)(nil),           // 14: daemon.SignalState
-	(*ManagementState)(nil),       // 15: daemon.ManagementState
-	(*FullStatus)(nil),            // 16: daemon.FullStatus
-	(*timestamppb.Timestamp)(nil), // 17: google.protobuf.Timestamp
+	(*LoginRequest)(nil),         // 0: daemon.LoginRequest
+	(*LoginResponse)(nil),        // 1: daemon.LoginResponse
+	(*WaitSSOLoginRequest)(nil),  // 2: daemon.WaitSSOLoginRequest
+	(*WaitSSOLoginResponse)(nil), // 3: daemon.WaitSSOLoginResponse
+	(*UpRequest)(nil),            // 4: daemon.UpRequest
+	(*UpResponse)(nil),           // 5: daemon.UpResponse
+	(*StatusRequest)(nil),        // 6: daemon.StatusRequest
+	(*StatusResponse)(nil),       // 7: daemon.StatusResponse
+	(*DownRequest)(nil),          // 8: daemon.DownRequest
+	(*DownResponse)(nil),         // 9: daemon.DownResponse
+	(*GetConfigRequest)(nil),     // 10: daemon.GetConfigRequest
+	(*GetConfigResponse)(nil),    // 11: daemon.GetConfigResponse
+	(*PeerState)(nil),            // 12: daemon.PeerState
+	(*LocalPeerState)(nil),       // 13: daemon.LocalPeerState
+	(*SignalState)(nil),          // 14: daemon.SignalState
+	(*ManagementState)(nil),      // 15: daemon.ManagementState
+	(*RelayState)(nil),           // 16: daemon.RelayState
+	(*FullStatus)(nil),           // 17: daemon.FullStatus
+	(*timestamp.Timestamp)(nil),  // 18: google.protobuf.Timestamp
 }
 var file_daemon_proto_depIdxs = []int32{
-	16, // 0: daemon.StatusResponse.fullStatus:type_name -> daemon.FullStatus
-	17, // 1: daemon.PeerState.connStatusUpdate:type_name -> google.protobuf.Timestamp
-	15, // 2: daemon.FullStatus.managementState:type_name -> daemon.ManagementState
-	14, // 3: daemon.FullStatus.signalState:type_name -> daemon.SignalState
-	13, // 4: daemon.FullStatus.localPeerState:type_name -> daemon.LocalPeerState
-	12, // 5: daemon.FullStatus.peers:type_name -> daemon.PeerState
-	0,  // 6: daemon.DaemonService.Login:input_type -> daemon.LoginRequest
-	2,  // 7: daemon.DaemonService.WaitSSOLogin:input_type -> daemon.WaitSSOLoginRequest
-	4,  // 8: daemon.DaemonService.Up:input_type -> daemon.UpRequest
-	6,  // 9: daemon.DaemonService.Status:input_type -> daemon.StatusRequest
-	8,  // 10: daemon.DaemonService.Down:input_type -> daemon.DownRequest
-	10, // 11: daemon.DaemonService.GetConfig:input_type -> daemon.GetConfigRequest
-	1,  // 12: daemon.DaemonService.Login:output_type -> daemon.LoginResponse
-	3,  // 13: daemon.DaemonService.WaitSSOLogin:output_type -> daemon.WaitSSOLoginResponse
-	5,  // 14: daemon.DaemonService.Up:output_type -> daemon.UpResponse
-	7,  // 15: daemon.DaemonService.Status:output_type -> daemon.StatusResponse
-	9,  // 16: daemon.DaemonService.Down:output_type -> daemon.DownResponse
-	11, // 17: daemon.DaemonService.GetConfig:output_type -> daemon.GetConfigResponse
-	12, // [12:18] is the sub-list for method output_type
-	6,  // [6:12] is the sub-list for method input_type
-	6,  // [6:6] is the sub-list for extension type_name
-	6,  // [6:6] is the sub-list for extension extendee
-	0,  // [0:6] is the sub-list for field type_name
+	17, // 0: daemon.StatusResponse.fullStatus:type_name -> daemon.FullStatus
+	18, // 1: daemon.PeerState.connStatusUpdate:type_name -> google.protobuf.Timestamp
+	18, // 2: daemon.PeerState.lastWireguardHandshake:type_name -> google.protobuf.Timestamp
+	15, // 3: daemon.FullStatus.managementState:type_name -> daemon.ManagementState
+	14, // 4: daemon.FullStatus.signalState:type_name -> daemon.SignalState
+	13, // 5: daemon.FullStatus.localPeerState:type_name -> daemon.LocalPeerState
+	12, // 6: daemon.FullStatus.peers:type_name -> daemon.PeerState
+	16, // 7: daemon.FullStatus.relays:type_name -> daemon.RelayState
+	0,  // 8: daemon.DaemonService.Login:input_type -> daemon.LoginRequest
+	2,  // 9: daemon.DaemonService.WaitSSOLogin:input_type -> daemon.WaitSSOLoginRequest
+	4,  // 10: daemon.DaemonService.Up:input_type -> daemon.UpRequest
+	6,  // 11: daemon.DaemonService.Status:input_type -> daemon.StatusRequest
+	8,  // 12: daemon.DaemonService.Down:input_type -> daemon.DownRequest
+	10, // 13: daemon.DaemonService.GetConfig:input_type -> daemon.GetConfigRequest
+	1,  // 14: daemon.DaemonService.Login:output_type -> daemon.LoginResponse
+	3,  // 15: daemon.DaemonService.WaitSSOLogin:output_type -> daemon.WaitSSOLoginResponse
+	5,  // 16: daemon.DaemonService.Up:output_type -> daemon.UpResponse
+	7,  // 17: daemon.DaemonService.Status:output_type -> daemon.StatusResponse
+	9,  // 18: daemon.DaemonService.Down:output_type -> daemon.DownResponse
+	11, // 19: daemon.DaemonService.GetConfig:output_type -> daemon.GetConfigResponse
+	14, // [14:20] is the sub-list for method output_type
+	8,  // [8:14] is the sub-list for method input_type
+	8,  // [8:8] is the sub-list for extension type_name
+	8,  // [8:8] is the sub-list for extension extendee
+	0,  // [0:8] is the sub-list for field type_name
 }
 
 func init() { file_daemon_proto_init() }
@@ -1510,6 +1756,18 @@ func file_daemon_proto_init() {
 			}
 		}
 		file_daemon_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*RelayState); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_daemon_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*FullStatus); i {
 			case 0:
 				return &v.state
@@ -1529,7 +1787,7 @@ func file_daemon_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_daemon_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   17,
+			NumMessages:   18,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

client/proto/daemon.proto

@@ -32,8 +32,9 @@ message LoginRequest {
   // setupKey wiretrustee setup key.
   string setupKey = 1;
 
-  // preSharedKey for wireguard setup.
-  string preSharedKey = 2;
+  // This is the old PreSharedKey field which will be deprecated in favor of optionalPreSharedKey field that is defined as optional
+  // to allow clearing of preshared key while being able to persist in the config file.
+  string preSharedKey = 2 [deprecated = true];
 
   // managementUrl to authenticate.
   string managementUrl = 3;
@@ -61,6 +62,13 @@ message LoginRequest {
 
   optional int64 wireguardPort = 12;
 
+  optional string optionalPreSharedKey = 13;
+
+  optional bool disableAutoConnect = 14;
+
+  optional bool serverSSHAllowed = 15;
+
+  optional bool rosenpassPermissive = 16;
 }
 
 message LoginResponse {
@@ -125,33 +133,52 @@ message PeerState {
   bool relayed = 5;
   bool direct = 6;
   string localIceCandidateType = 7;
-  string remoteIceCandidateType =8;
+  string remoteIceCandidateType = 8;
   string fqdn = 9;
+  string localIceCandidateEndpoint = 10;
+  string remoteIceCandidateEndpoint = 11;
+  google.protobuf.Timestamp lastWireguardHandshake = 12;
+  int64 bytesRx = 13;
+  int64 bytesTx = 14;
+  bool rosenpassEnabled = 15;
 }
 
 // LocalPeerState contains the latest state of the local peer
 message LocalPeerState {
   string IP = 1;
   string pubKey = 2;
-  bool  kernelInterface =3;
+  bool  kernelInterface = 3;
   string fqdn = 4;
+  bool rosenpassEnabled = 5;
+  bool rosenpassPermissive = 6;
 }
 
 // SignalState contains the latest state of a signal connection
 message SignalState {
   string URL = 1;
   bool connected = 2;
+  string error = 3;
 }
 
 // ManagementState contains the latest state of a management connection
 message ManagementState {
   string URL = 1;
   bool connected = 2;
+  string error = 3;
 }
+
+// RelayState contains the latest state of the relay
+message RelayState {
+  string URI = 1;
+  bool available = 2;
+  string error = 3;
+}
+
 // FullStatus contains the full state held by the Status instance
 message FullStatus {
-    ManagementState managementState = 1;
-    SignalState     signalState = 2;
-    LocalPeerState  localPeerState = 3;
-    repeated PeerState peers = 4;
+  ManagementState managementState = 1;
+  SignalState     signalState = 2;
+  LocalPeerState  localPeerState = 3;
+  repeated PeerState peers = 4;
+  repeated RelayState relays = 5;
 }

client/proto/generate.sh

@@ -13,5 +13,5 @@ script_path=$(dirname $(realpath "$0"))
 cd "$script_path"
 go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.26
 go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.1
-protoc -I ./ ./daemon.proto --go_out=../ --go-grpc_out=../
+protoc -I ./ ./daemon.proto --go_out=../ --go-grpc_out=../ --experimental_allow_proto3_optional
 cd "$old_pwd"

client/server/server.go

@@ -3,6 +3,8 @@ package server
 import (
 	"context"
 	"fmt"
+	"os/exec"
+	"runtime"
 	"sync"
 	"time"
 
@@ -21,6 +23,8 @@ import (
 	"github.com/netbirdio/netbird/version"
 )
 
+const probeThreshold = time.Second * 5
+
 // Server for service control.
 type Server struct {
 	rootCtx   context.Context
@@ -37,6 +41,13 @@ type Server struct {
 	proto.UnimplementedDaemonServiceServer
 
 	statusRecorder *peer.Status
+	sessionWatcher *internal.SessionWatcher
+
+	mgmProbe    *internal.Probe
+	signalProbe *internal.Probe
+	relayProbe  *internal.Probe
+	wgProbe     *internal.Probe
+	lastProbe   time.Time
 }
 
 type oauthAuthFlow struct {
@@ -53,7 +64,11 @@ func New(ctx context.Context, configPath, logFile string) *Server {
 		latestConfigInput: internal.ConfigInput{
 			ConfigPath: configPath,
 		},
-		logFile: logFile,
+		logFile:     logFile,
+		mgmProbe:    internal.NewProbe(),
+		signalProbe: internal.NewProbe(),
+		relayProbe:  internal.NewProbe(),
+		wgProbe:     internal.NewProbe(),
 	}
 }
 
@@ -100,15 +115,22 @@ func (s *Server) Start() error {
 
 	if s.statusRecorder == nil {
 		s.statusRecorder = peer.NewRecorder(config.ManagementURL.String())
-	} else {
-		s.statusRecorder.UpdateManagementAddress(config.ManagementURL.String())
+	}
+	s.statusRecorder.UpdateManagementAddress(config.ManagementURL.String())
+	s.statusRecorder.UpdateRosenpass(config.RosenpassEnabled, config.RosenpassPermissive)
+
+	if s.sessionWatcher == nil {
+		s.sessionWatcher = internal.NewSessionWatcher(s.rootCtx, s.statusRecorder)
+		s.sessionWatcher.SetOnExpireListener(s.onSessionExpire)
 	}
 
-	go func() {
-		if err := internal.RunClient(ctx, config, s.statusRecorder); err != nil {
-			log.Errorf("init connections: %v", err)
-		}
-	}()
+	if !config.DisableAutoConnect {
+		go func() {
+			if err := internal.RunClientWithProbes(ctx, config, s.statusRecorder, s.mgmProbe, s.signalProbe, s.relayProbe, s.wgProbe); err != nil {
+				log.Errorf("init connections: %v", err)
+			}
+		}()
+	}
 
 	return nil
 }
@@ -192,6 +214,21 @@ func (s *Server) Login(callerCtx context.Context, msg *proto.LoginRequest) (*pro
 		s.latestConfigInput.RosenpassEnabled = msg.RosenpassEnabled
 	}
 
+	if msg.RosenpassPermissive != nil {
+		inputConfig.RosenpassPermissive = msg.RosenpassPermissive
+		s.latestConfigInput.RosenpassPermissive = msg.RosenpassPermissive
+	}
+
+	if msg.ServerSSHAllowed != nil {
+		inputConfig.ServerSSHAllowed = msg.ServerSSHAllowed
+		s.latestConfigInput.ServerSSHAllowed = msg.ServerSSHAllowed
+	}
+
+	if msg.DisableAutoConnect != nil {
+		inputConfig.DisableAutoConnect = msg.DisableAutoConnect
+		s.latestConfigInput.DisableAutoConnect = msg.DisableAutoConnect
+	}
+
 	if msg.InterfaceName != nil {
 		inputConfig.InterfaceName = msg.InterfaceName
 		s.latestConfigInput.InterfaceName = msg.InterfaceName
@@ -205,7 +242,9 @@ func (s *Server) Login(callerCtx context.Context, msg *proto.LoginRequest) (*pro
 
 	s.mutex.Unlock()
 
-	inputConfig.PreSharedKey = &msg.PreSharedKey
+	if msg.OptionalPreSharedKey != nil {
+		inputConfig.PreSharedKey = msg.OptionalPreSharedKey
+	}
 
 	config, err := internal.UpdateOrCreateConfig(inputConfig)
 	if err != nil {
@@ -402,12 +441,12 @@ func (s *Server) Up(callerCtx context.Context, _ *proto.UpRequest) (*proto.UpRes
 
 	if s.statusRecorder == nil {
 		s.statusRecorder = peer.NewRecorder(s.config.ManagementURL.String())
-	} else {
-		s.statusRecorder.UpdateManagementAddress(s.config.ManagementURL.String())
 	}
+	s.statusRecorder.UpdateManagementAddress(s.config.ManagementURL.String())
+	s.statusRecorder.UpdateRosenpass(s.config.RosenpassEnabled, s.config.RosenpassPermissive)
 
 	go func() {
-		if err := internal.RunClient(ctx, s.config, s.statusRecorder); err != nil {
+		if err := internal.RunClientWithProbes(ctx, s.config, s.statusRecorder, s.mgmProbe, s.signalProbe, s.relayProbe, s.wgProbe); err != nil {
 			log.Errorf("run client connection: %v", err)
 			return
 		}
@@ -431,7 +470,7 @@ func (s *Server) Down(_ context.Context, _ *proto.DownRequest) (*proto.DownRespo
 	return &proto.DownResponse{}, nil
 }
 
-// Status starts engine work in the daemon.
+// Status returns the daemon status
 func (s *Server) Status(
 	_ context.Context,
 	msg *proto.StatusRequest,
@@ -448,11 +487,13 @@ func (s *Server) Status(
 
 	if s.statusRecorder == nil {
 		s.statusRecorder = peer.NewRecorder(s.config.ManagementURL.String())
-	} else {
-		s.statusRecorder.UpdateManagementAddress(s.config.ManagementURL.String())
 	}
+	s.statusRecorder.UpdateManagementAddress(s.config.ManagementURL.String())
+	s.statusRecorder.UpdateRosenpass(s.config.RosenpassEnabled, s.config.RosenpassPermissive)
 
 	if msg.GetFullPeerStatus {
+		s.runProbes()
+
 		fullStatus := s.statusRecorder.GetFullStatus()
 		pbFullStatus := toProtoFullStatus(fullStatus)
 		statusResponse.FullStatus = pbFullStatus
@@ -461,6 +502,20 @@ func (s *Server) Status(
 	return &statusResponse, nil
 }
 
+func (s *Server) runProbes() {
+	if time.Since(s.lastProbe) > probeThreshold {
+		managementHealthy := s.mgmProbe.Probe()
+		signalHealthy := s.signalProbe.Probe()
+		relayHealthy := s.relayProbe.Probe()
+		wgProbe := s.wgProbe.Probe()
+
+		// Update last time only if all probes were successful
+		if managementHealthy && signalHealthy && relayHealthy && wgProbe {
+			s.lastProbe = time.Now()
+		}
+	}
+}
+
 // GetConfig of the daemon.
 func (s *Server) GetConfig(_ context.Context, _ *proto.GetConfigRequest) (*proto.GetConfigResponse, error) {
 	s.mutex.Lock()
@@ -495,38 +550,104 @@ func (s *Server) GetConfig(_ context.Context, _ *proto.GetConfigRequest) (*proto
 	}, nil
 }
 
+func (s *Server) onSessionExpire() {
+	if runtime.GOOS != "windows" {
+		isUIActive := internal.CheckUIApp()
+		if !isUIActive {
+			if err := sendTerminalNotification(); err != nil {
+				log.Errorf("send session expire terminal notification: %v", err)
+			}
+		}
+	}
+}
+
 func toProtoFullStatus(fullStatus peer.FullStatus) *proto.FullStatus {
 	pbFullStatus := proto.FullStatus{
 		ManagementState: &proto.ManagementState{},
 		SignalState:     &proto.SignalState{},
 		LocalPeerState:  &proto.LocalPeerState{},
 		Peers:           []*proto.PeerState{},
+		Relays:          []*proto.RelayState{},
 	}
 
 	pbFullStatus.ManagementState.URL = fullStatus.ManagementState.URL
 	pbFullStatus.ManagementState.Connected = fullStatus.ManagementState.Connected
+	if err := fullStatus.ManagementState.Error; err != nil {
+		pbFullStatus.ManagementState.Error = err.Error()
+	}
 
 	pbFullStatus.SignalState.URL = fullStatus.SignalState.URL
 	pbFullStatus.SignalState.Connected = fullStatus.SignalState.Connected
+	if err := fullStatus.SignalState.Error; err != nil {
+		pbFullStatus.SignalState.Error = err.Error()
+	}
 
 	pbFullStatus.LocalPeerState.IP = fullStatus.LocalPeerState.IP
 	pbFullStatus.LocalPeerState.PubKey = fullStatus.LocalPeerState.PubKey
 	pbFullStatus.LocalPeerState.KernelInterface = fullStatus.LocalPeerState.KernelInterface
 	pbFullStatus.LocalPeerState.Fqdn = fullStatus.LocalPeerState.FQDN
+	pbFullStatus.LocalPeerState.RosenpassPermissive = fullStatus.RosenpassState.Permissive
+	pbFullStatus.LocalPeerState.RosenpassEnabled = fullStatus.RosenpassState.Enabled
 
 	for _, peerState := range fullStatus.Peers {
 		pbPeerState := &proto.PeerState{
-			IP:                     peerState.IP,
-			PubKey:                 peerState.PubKey,
-			ConnStatus:             peerState.ConnStatus.String(),
-			ConnStatusUpdate:       timestamppb.New(peerState.ConnStatusUpdate),
-			Relayed:                peerState.Relayed,
-			Direct:                 peerState.Direct,
-			LocalIceCandidateType:  peerState.LocalIceCandidateType,
-			RemoteIceCandidateType: peerState.RemoteIceCandidateType,
-			Fqdn:                   peerState.FQDN,
+			IP:                         peerState.IP,
+			PubKey:                     peerState.PubKey,
+			ConnStatus:                 peerState.ConnStatus.String(),
+			ConnStatusUpdate:           timestamppb.New(peerState.ConnStatusUpdate),
+			Relayed:                    peerState.Relayed,
+			Direct:                     peerState.Direct,
+			LocalIceCandidateType:      peerState.LocalIceCandidateType,
+			RemoteIceCandidateType:     peerState.RemoteIceCandidateType,
+			LocalIceCandidateEndpoint:  peerState.LocalIceCandidateEndpoint,
+			RemoteIceCandidateEndpoint: peerState.RemoteIceCandidateEndpoint,
+			Fqdn:                       peerState.FQDN,
+			LastWireguardHandshake:     timestamppb.New(peerState.LastWireguardHandshake),
+			BytesRx:                    peerState.BytesRx,
+			BytesTx:                    peerState.BytesTx,
+			RosenpassEnabled:           peerState.RosenpassEnabled,
 		}
 		pbFullStatus.Peers = append(pbFullStatus.Peers, pbPeerState)
 	}
+
+	for _, relayState := range fullStatus.Relays {
+		pbRelayState := &proto.RelayState{
+			URI:       relayState.URI.String(),
+			Available: relayState.Err == nil,
+		}
+		if err := relayState.Err; err != nil {
+			pbRelayState.Error = err.Error()
+		}
+		pbFullStatus.Relays = append(pbFullStatus.Relays, pbRelayState)
+	}
+
 	return &pbFullStatus
 }
+
+// sendTerminalNotification sends a terminal notification message
+// to inform the user that the NetBird connection session has expired.
+func sendTerminalNotification() error {
+	message := "NetBird connection session expired\n\nPlease re-authenticate to connect to the network."
+	echoCmd := exec.Command("echo", message)
+	wallCmd := exec.Command("sudo", "wall")
+
+	echoCmdStdout, err := echoCmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+	wallCmd.Stdin = echoCmdStdout
+
+	if err := echoCmd.Start(); err != nil {
+		return err
+	}
+
+	if err := wallCmd.Start(); err != nil {
+		return err
+	}
+
+	if err := echoCmd.Wait(); err != nil {
+		return err
+	}
+
+	return wallCmd.Wait()
+}

client/system/detect_cloud/alibabacloud.go

@@ -0,0 +1,24 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectAlibabaCloud(ctx context.Context) string {
+	req, err := http.NewRequestWithContext(ctx, "GET", "http://100.100.100.200/latest/", nil)
+	if err != nil {
+		return ""
+	}
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusOK {
+		return "Alibaba Cloud"
+	}
+	return ""
+}

client/system/detect_cloud/aws.go

@@ -0,0 +1,57 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectAWS(ctx context.Context) string {
+	v1ResultChan := make(chan bool, 1)
+	v2ResultChan := make(chan bool, 1)
+
+	go func() {
+		v1ResultChan <- detectAWSIDMSv1(ctx)
+	}()
+
+	go func() {
+		v2ResultChan <- detectAWSIDMSv2(ctx)
+	}()
+
+	v1Result, v2Result := <-v1ResultChan, <-v2ResultChan
+
+	if v1Result || v2Result {
+		return "Amazon Web Services"
+	}
+	return ""
+}
+
+func detectAWSIDMSv1(ctx context.Context) bool {
+	req, err := http.NewRequestWithContext(ctx, "GET", "http://169.254.169.254/latest/", nil)
+	if err != nil {
+		return false
+	}
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return false
+	}
+	defer resp.Body.Close()
+
+	return resp.StatusCode == http.StatusOK
+}
+
+func detectAWSIDMSv2(ctx context.Context) bool {
+	req, err := http.NewRequestWithContext(ctx, "PUT", "http://169.254.169.254/latest/api/token", nil)
+	if err != nil {
+		return false
+	}
+	req.Header.Set("X-aws-ec2-metadata-token-ttl-seconds", "21600")
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return false
+	}
+	defer resp.Body.Close()
+
+	return resp.StatusCode == http.StatusOK
+}

client/system/detect_cloud/azure.go

@@ -0,0 +1,25 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectAzure(ctx context.Context) string {
+	req, err := http.NewRequestWithContext(ctx, "GET", "http://169.254.169.254/metadata/instance?api-version=2021-02-01", nil)
+	if err != nil {
+		return ""
+	}
+	req.Header.Set("Metadata", "true")
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusOK {
+		return "Microsoft Azure"
+	}
+	return ""
+}

client/system/detect_cloud/detect.go

@@ -0,0 +1,65 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+	"sync"
+	"time"
+)
+
+/*
+	This packages is inspired by the work of the original author (https://github.com/perlogix), but it has been modified to fit the needs of the project.
+	Original project: https://github.com/perlogix/libdetectcloud
+*/
+
+var hc = &http.Client{Timeout: 300 * time.Millisecond}
+
+func Detect(ctx context.Context) string {
+	subCtx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	funcs := []func(context.Context) string{
+		detectAlibabaCloud,
+		detectAWS,
+		detectAzure,
+		detectDigitalOcean,
+		detectGCP,
+		detectOracle,
+		detectIBMCloud,
+		detectSoftlayer,
+		detectVultr,
+	}
+
+	results := make(chan string, len(funcs))
+
+	var wg sync.WaitGroup
+
+	for _, fn := range funcs {
+		wg.Add(1)
+		go func(f func(context.Context) string) {
+			defer wg.Done()
+			select {
+			case <-subCtx.Done():
+				return
+			default:
+				if result := f(ctx); result != "" {
+					results <- result
+					cancel()
+				}
+			}
+		}(fn)
+	}
+
+	go func() {
+		wg.Wait()
+		close(results)
+	}()
+
+	for result := range results {
+		if result != "" {
+			return result
+		}
+	}
+
+	return ""
+}

client/system/detect_cloud/digitalocean.go

@@ -0,0 +1,24 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectDigitalOcean(ctx context.Context) string {
+	req, err := http.NewRequestWithContext(ctx, "GET", "http://169.254.169.254/metadata/v1/", nil)
+	if err != nil {
+		return ""
+	}
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusOK {
+		return "Digital Ocean"
+	}
+	return ""
+}

client/system/detect_cloud/gcp.go

@@ -0,0 +1,25 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectGCP(ctx context.Context) string {
+	req, err := http.NewRequestWithContext(ctx, "GET", "http://metadata.google.internal", nil)
+	if err != nil {
+		return ""
+	}
+	req.Header.Add("Metadata-Flavor", "Google")
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusOK {
+		return "Google Cloud Platform"
+	}
+	return ""
+}

client/system/detect_cloud/ibmcloud.go

@@ -0,0 +1,54 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectIBMCloud(ctx context.Context) string {
+	v1ResultChan := make(chan bool, 1)
+	v2ResultChan := make(chan bool, 1)
+
+	go func() {
+		v1ResultChan <- detectIBMSecure(ctx)
+	}()
+
+	go func() {
+		v2ResultChan <- detectIBM(ctx)
+	}()
+
+	v1Result, v2Result := <-v1ResultChan, <-v2ResultChan
+
+	if v1Result || v2Result {
+		return "IBM Cloud"
+	}
+	return ""
+}
+
+func detectIBMSecure(ctx context.Context) bool {
+	req, err := http.NewRequestWithContext(ctx, "PUT", "https://api.metadata.cloud.ibm.com/instance_identity/v1/token", nil)
+	if err != nil {
+		return false
+	}
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return false
+	}
+	defer resp.Body.Close()
+	return resp.StatusCode == http.StatusOK
+}
+
+func detectIBM(ctx context.Context) bool {
+	req, err := http.NewRequestWithContext(ctx, "PUT", "http://api.metadata.cloud.ibm.com/instance_identity/v1/token", nil)
+	if err != nil {
+		return false
+	}
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return false
+	}
+	defer resp.Body.Close()
+	return resp.StatusCode == http.StatusOK
+}

client/system/detect_cloud/oracle.go

@@ -0,0 +1,56 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectOracle(ctx context.Context) string {
+	v1ResultChan := make(chan bool, 1)
+	v2ResultChan := make(chan bool, 1)
+
+	go func() {
+		v1ResultChan <- detectOracleIDMSv1(ctx)
+	}()
+
+	go func() {
+		v2ResultChan <- detectOracleIDMSv2(ctx)
+	}()
+
+	v1Result, v2Result := <-v1ResultChan, <-v2ResultChan
+
+	if v1Result || v2Result {
+		return "Oracle"
+	}
+	return ""
+}
+
+func detectOracleIDMSv1(ctx context.Context) bool {
+	req, err := http.NewRequestWithContext(ctx, "GET", "http://169.254.169.254/opc/v1/instance/", nil)
+	if err != nil {
+		return false
+	}
+	req.Header.Add("Authorization", "Bearer Oracle")
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return false
+	}
+	defer resp.Body.Close()
+	return resp.StatusCode == http.StatusOK
+}
+
+func detectOracleIDMSv2(ctx context.Context) bool {
+	req, err := http.NewRequestWithContext(ctx, "GET", "http://169.254.169.254/opc/v2/instance/", nil)
+	if err != nil {
+		return false
+	}
+	req.Header.Add("Authorization", "Bearer Oracle")
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return false
+	}
+	defer resp.Body.Close()
+	return resp.StatusCode == http.StatusOK
+}

client/system/detect_cloud/softlayer.go

@@ -0,0 +1,25 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectSoftlayer(ctx context.Context) string {
+	req, err := http.NewRequestWithContext(ctx, "GET", "https://api.service.softlayer.com/rest/v3/SoftLayer_Resource_Metadata/UserMetadata.txt", nil)
+	if err != nil {
+		return ""
+	}
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusOK {
+		// Since SoftLayer was acquired by IBM, we should return "IBM Cloud"
+		return "IBM Cloud"
+	}
+	return ""
+}

client/system/detect_cloud/vultr.go

@@ -0,0 +1,24 @@
+package detect_cloud
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectVultr(ctx context.Context) string {
+	req, err := http.NewRequestWithContext(ctx, "GET", "http://169.254.169.254/v1.json", nil)
+	if err != nil {
+		return ""
+	}
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusOK {
+		return "Vultr"
+	}
+	return ""
+}

client/system/detect_platform/detect.go

@@ -0,0 +1,53 @@
+package detect_platform
+
+import (
+	"context"
+	"net/http"
+	"sync"
+	"time"
+)
+
+var hc = &http.Client{Timeout: 300 * time.Millisecond}
+
+func Detect(ctx context.Context) string {
+	subCtx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	funcs := []func(context.Context) string{
+		detectOpenStack,
+		detectContainer,
+	}
+
+	results := make(chan string, len(funcs))
+
+	var wg sync.WaitGroup
+
+	for _, fn := range funcs {
+		wg.Add(1)
+		go func(f func(context.Context) string) {
+			defer wg.Done()
+			select {
+			case <-subCtx.Done():
+				return
+			default:
+				if result := f(ctx); result != "" {
+					results <- result
+					cancel()
+				}
+			}
+		}(fn)
+	}
+
+	go func() {
+		wg.Wait()
+		close(results)
+	}()
+
+	for result := range results {
+		if result != "" {
+			return result
+		}
+	}
+
+	return ""
+}

client/system/detect_platform/kube.go

@@ -0,0 +1,17 @@
+package detect_platform
+
+import (
+	"context"
+	"os"
+)
+
+func detectContainer(ctx context.Context) string {
+	if _, exists := os.LookupEnv("KUBERNETES_SERVICE_HOST"); exists {
+		return "Kubernetes"
+	}
+
+	if _, err := os.Stat("/.dockerenv"); err == nil {
+		return "Docker"
+	}
+	return ""
+}

client/system/detect_platform/openstack.go

@@ -0,0 +1,24 @@
+package detect_platform
+
+import (
+	"context"
+	"net/http"
+)
+
+func detectOpenStack(ctx context.Context) string {
+	req, err := http.NewRequestWithContext(ctx, "GET", "http://169.254.169.254/openstack", nil)
+	if err != nil {
+		return ""
+	}
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return ""
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusOK {
+		return "OpenStack"
+	}
+	return ""
+}

client/system/info.go

@@ -2,6 +2,8 @@ package system
 
 import (
 	"context"
+	"net"
+	"net/netip"
 	"strings"
 
 	"google.golang.org/grpc/metadata"
@@ -18,12 +20,21 @@ const OsVersionCtxKey = "OsVersion"
 // OsNameCtxKey context key for operating system name
 const OsNameCtxKey = "OsName"
 
+type NetworkAddress struct {
+	NetIP netip.Prefix
+	Mac   string
+}
+
+type Environment struct {
+	Cloud    string
+	Platform string
+}
+
 // Info is an object that contains machine information
 // Most of the code is taken from https://github.com/matishsiao/goInfo
 type Info struct {
 	GoOS               string
 	Kernel             string
-	Core               string
 	Platform           string
 	OS                 string
 	OSVersion          string
@@ -31,6 +42,12 @@ type Info struct {
 	CPUs               int
 	WiretrusteeVersion string
 	UIVersion          string
+	KernelVersion      string
+	NetworkAddresses   []NetworkAddress
+	SystemSerialNumber string
+	SystemProductName  string
+	SystemManufacturer string
+	Environment        Environment
 }
 
 // extractUserAgent extracts Netbird's agent (client) name and version from the outgoing context
@@ -62,3 +79,53 @@ func extractDeviceName(ctx context.Context, defaultName string) string {
 func GetDesktopUIUserAgent() string {
 	return "netbird-desktop-ui/" + version.NetbirdVersion()
 }
+
+func networkAddresses() ([]NetworkAddress, error) {
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return nil, err
+	}
+
+	var netAddresses []NetworkAddress
+	for _, iface := range interfaces {
+		if iface.HardwareAddr.String() == "" {
+			continue
+		}
+		addrs, err := iface.Addrs()
+		if err != nil {
+			continue
+		}
+
+		for _, address := range addrs {
+			ipNet, ok := address.(*net.IPNet)
+			if !ok {
+				continue
+			}
+
+			if ipNet.IP.IsLoopback() {
+				continue
+			}
+
+			netAddr := NetworkAddress{
+				NetIP: netip.MustParsePrefix(ipNet.String()),
+				Mac:   iface.HardwareAddr.String(),
+			}
+
+			if isDuplicated(netAddresses, netAddr) {
+				continue
+			}
+
+			netAddresses = append(netAddresses, netAddr)
+		}
+	}
+	return netAddresses, nil
+}
+
+func isDuplicated(addresses []NetworkAddress, addr NetworkAddress) bool {
+	for _, duplicated := range addresses {
+		if duplicated.NetIP == addr.NetIP {
+			return true
+		}
+	}
+	return false
+}

client/system/info_android.go

@@ -23,7 +23,12 @@ func GetInfo(ctx context.Context) *Info {
 		kernel = osInfo[1]
 	}
 
-	gio := &Info{Kernel: kernel, Core: osVersion(), Platform: "unknown", OS: "android", OSVersion: osVersion(), GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
+	var kernelVersion string
+	if len(osInfo) > 2 {
+		kernelVersion = osInfo[2]
+	}
+
+	gio := &Info{Kernel: kernel, Platform: "unknown", OS: "android", OSVersion: osVersion(), GoOS: runtime.GOOS, CPUs: runtime.NumCPU(), KernelVersion: kernelVersion}
 	gio.Hostname = extractDeviceName(ctx, "android")
 	gio.WiretrusteeVersion = version.NetbirdVersion()
 	gio.UIVersion = extractUserAgent(ctx)

client/system/info_darwin.go

@@ -15,6 +15,8 @@ import (
 
 	log "github.com/sirupsen/logrus"
 
+	"github.com/netbirdio/netbird/client/system/detect_cloud"
+	"github.com/netbirdio/netbird/client/system/detect_platform"
 	"github.com/netbirdio/netbird/version"
 )
 
@@ -33,7 +35,34 @@ func GetInfo(ctx context.Context) *Info {
 		log.Warnf("got an error while retrieving macOS version with sw_vers, error: %s. Using darwin version instead.\n", err)
 		swVersion = []byte(release)
 	}
-	gio := &Info{Kernel: sysName, OSVersion: strings.TrimSpace(string(swVersion)), Core: release, Platform: machine, OS: sysName, GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
+
+	addrs, err := networkAddresses()
+	if err != nil {
+		log.Warnf("failed to discover network addresses: %s", err)
+	}
+
+	serialNum, prodName, manufacturer := sysInfo()
+
+	env := Environment{
+		Cloud:    detect_cloud.Detect(ctx),
+		Platform: detect_platform.Detect(ctx),
+	}
+
+	gio := &Info{
+		Kernel:             sysName,
+		OSVersion:          strings.TrimSpace(string(swVersion)),
+		Platform:           machine,
+		OS:                 sysName,
+		GoOS:               runtime.GOOS,
+		CPUs:               runtime.NumCPU(),
+		KernelVersion:      release,
+		NetworkAddresses:   addrs,
+		SystemSerialNumber: serialNum,
+		SystemProductName:  prodName,
+		SystemManufacturer: manufacturer,
+		Environment:        env,
+	}
+
 	systemHostname, _ := os.Hostname()
 	gio.Hostname = extractDeviceName(ctx, systemHostname)
 	gio.WiretrusteeVersion = version.NetbirdVersion()
@@ -41,3 +70,31 @@ func GetInfo(ctx context.Context) *Info {
 
 	return gio
 }
+
+func sysInfo() (serialNumber string, productName string, manufacturer string) {
+	out, _ := exec.Command("/usr/sbin/ioreg", "-l").Output() // err ignored for brevity
+	for _, l := range strings.Split(string(out), "\n") {
+		if strings.Contains(l, "IOPlatformSerialNumber") {
+			serialNumber = trimIoRegLine(l)
+		}
+
+		if strings.Contains(l, "ModelNumber") && productName == "" {
+			productName = trimIoRegLine(l)
+		}
+
+		if strings.Contains(l, "device manufacturer") && manufacturer == "" {
+			manufacturer = trimIoRegLine(l)
+		}
+
+	}
+	return
+}
+
+func trimIoRegLine(l string) string {
+	kv := strings.Split(l, "=")
+	if len(kv) != 2 {
+		return ""
+	}
+	s := strings.TrimSpace(kv[1])
+	return strings.Trim(s, `"`)
+}

client/system/info_darwin_test.go

@@ -0,0 +1,23 @@
+package system
+
+import (
+	log "github.com/sirupsen/logrus"
+	"testing"
+)
+
+func Test_sysInfo(t *testing.T) {
+	t.Skip("skipping darwin test")
+	serialNum, prodName, manufacturer := sysInfo()
+	if serialNum == "" {
+		t.Errorf("serialNum is empty")
+	}
+
+	if prodName == "" {
+		t.Errorf("prodName is empty")
+	}
+
+	if manufacturer == "" {
+		t.Errorf("manufacturer is empty")
+	}
+	log.Infof("Mac sys info: %s, %s, %s", serialNum, prodName, manufacturer)
+}

client/system/info_freebsd.go

@@ -10,6 +10,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/netbirdio/netbird/client/system/detect_cloud"
+	"github.com/netbirdio/netbird/client/system/detect_platform"
 	"github.com/netbirdio/netbird/version"
 )
 
@@ -23,7 +25,14 @@ func GetInfo(ctx context.Context) *Info {
 	osStr := strings.Replace(out, "\n", "", -1)
 	osStr = strings.Replace(osStr, "\r\n", "", -1)
 	osInfo := strings.Split(osStr, " ")
-	gio := &Info{Kernel: osInfo[0], Core: osInfo[1], Platform: runtime.GOARCH, OS: osInfo[2], GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
+
+	env := Environment{
+		Cloud:    detect_cloud.Detect(ctx),
+		Platform: detect_platform.Detect(ctx),
+	}
+
+	gio := &Info{Kernel: osInfo[0], Platform: runtime.GOARCH, OS: osInfo[2], GoOS: runtime.GOOS, CPUs: runtime.NumCPU(), KernelVersion: osInfo[1], Environment: env}
+
 	systemHostname, _ := os.Hostname()
 	gio.Hostname = extractDeviceName(ctx, systemHostname)
 	gio.WiretrusteeVersion = version.NetbirdVersion()

client/system/info_ios.go

@@ -17,7 +17,7 @@ func GetInfo(ctx context.Context) *Info {
 	sysName := extractOsName(ctx, "sysName")
 	swVersion := extractOsVersion(ctx, "swVersion")
 
-	gio := &Info{Kernel: sysName, OSVersion: swVersion, Core: swVersion, Platform: "unknown", OS: sysName, GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
+	gio := &Info{Kernel: sysName, OSVersion: swVersion, Platform: "unknown", OS: sysName, GoOS: runtime.GOOS, CPUs: runtime.NumCPU(), KernelVersion: swVersion}
 	gio.Hostname = extractDeviceName(ctx, "hostname")
 	gio.WiretrusteeVersion = version.NetbirdVersion()
 	gio.UIVersion = extractUserAgent(ctx)

client/system/info_linux.go

@@ -13,7 +13,10 @@ import (
 	"time"
 
 	log "github.com/sirupsen/logrus"
+	"github.com/zcalusic/sysinfo"
 
+	"github.com/netbirdio/netbird/client/system/detect_cloud"
+	"github.com/netbirdio/netbird/client/system/detect_platform"
 	"github.com/netbirdio/netbird/version"
 )
 
@@ -50,11 +53,38 @@ func GetInfo(ctx context.Context) *Info {
 	if osName == "" {
 		osName = osInfo[3]
 	}
-	gio := &Info{Kernel: osInfo[0], Core: osInfo[1], Platform: osInfo[2], OS: osName, OSVersion: osVer, GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
+
 	systemHostname, _ := os.Hostname()
-	gio.Hostname = extractDeviceName(ctx, systemHostname)
-	gio.WiretrusteeVersion = version.NetbirdVersion()
-	gio.UIVersion = extractUserAgent(ctx)
+
+	addrs, err := networkAddresses()
+	if err != nil {
+		log.Warnf("failed to discover network addresses: %s", err)
+	}
+
+	serialNum, prodName, manufacturer := sysInfo()
+
+	env := Environment{
+		Cloud:    detect_cloud.Detect(ctx),
+		Platform: detect_platform.Detect(ctx),
+	}
+
+	gio := &Info{
+		Kernel:             osInfo[0],
+		Platform:           osInfo[2],
+		OS:                 osName,
+		OSVersion:          osVer,
+		Hostname:           extractDeviceName(ctx, systemHostname),
+		GoOS:               runtime.GOOS,
+		CPUs:               runtime.NumCPU(),
+		WiretrusteeVersion: version.NetbirdVersion(),
+		UIVersion:          extractUserAgent(ctx),
+		KernelVersion:      osInfo[1],
+		NetworkAddresses:   addrs,
+		SystemSerialNumber: serialNum,
+		SystemProductName:  prodName,
+		SystemManufacturer: manufacturer,
+		Environment:        env,
+	}
 
 	return gio
 }
@@ -86,3 +116,9 @@ func _getReleaseInfo() string {
 	}
 	return out.String()
 }
+
+func sysInfo() (serialNumber string, productName string, manufacturer string) {
+	var si sysinfo.SysInfo
+	si.GetSysInfo()
+	return si.Product.Version, si.Product.Name, si.Product.Vendor
+}

client/system/info_test.go

@@ -33,3 +33,13 @@ func Test_CustomHostname(t *testing.T) {
 	got := GetInfo(ctx)
 	assert.Equal(t, want, got.Hostname)
 }
+
+func Test_NetAddresses(t *testing.T) {
+	addr, err := networkAddresses()
+	if err != nil {
+		t.Errorf("failed to discover network addresses: %s", err)
+	}
+	if len(addr) == 0 {
+		t.Errorf("no network addresses found")
+	}
+}

client/system/info_windows.go

@@ -11,6 +11,8 @@ import (
 	"github.com/yusufpapurcu/wmi"
 	"golang.org/x/sys/windows/registry"
 
+	"github.com/netbirdio/netbird/client/system/detect_cloud"
+	"github.com/netbirdio/netbird/client/system/detect_platform"
 	"github.com/netbirdio/netbird/version"
 )
 
@@ -18,11 +20,63 @@ type Win32_OperatingSystem struct {
 	Caption string
 }
 
+type Win32_ComputerSystem struct {
+	Manufacturer string
+}
+
+type Win32_ComputerSystemProduct struct {
+	Name string
+}
+
+type Win32_BIOS struct {
+	SerialNumber string
+}
+
 // GetInfo retrieves and parses the system information
 func GetInfo(ctx context.Context) *Info {
 	osName, osVersion := getOSNameAndVersion()
 	buildVersion := getBuildVersion()
-	gio := &Info{Kernel: "windows", OSVersion: osVersion, Core: buildVersion, Platform: "unknown", OS: osName, GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
+
+	addrs, err := networkAddresses()
+	if err != nil {
+		log.Warnf("failed to discover network addresses: %s", err)
+	}
+
+	serialNum, err := sysNumber()
+	if err != nil {
+		log.Warnf("failed to get system serial number: %s", err)
+	}
+
+	prodName, err := sysProductName()
+	if err != nil {
+		log.Warnf("failed to get system product name: %s", err)
+	}
+
+	manufacturer, err := sysManufacturer()
+	if err != nil {
+		log.Warnf("failed to get system manufacturer: %s", err)
+	}
+
+	env := Environment{
+		Cloud:    detect_cloud.Detect(ctx),
+		Platform: detect_platform.Detect(ctx),
+	}
+
+	gio := &Info{
+		Kernel:             "windows",
+		OSVersion:          osVersion,
+		Platform:           "unknown",
+		OS:                 osName,
+		GoOS:               runtime.GOOS,
+		CPUs:               runtime.NumCPU(),
+		KernelVersion:      buildVersion,
+		NetworkAddresses:   addrs,
+		SystemSerialNumber: serialNum,
+		SystemProductName:  prodName,
+		SystemManufacturer: manufacturer,
+		Environment:        env,
+	}
+
 	systemHostname, _ := os.Hostname()
 	gio.Hostname = extractDeviceName(ctx, systemHostname)
 	gio.WiretrusteeVersion = version.NetbirdVersion()
@@ -93,3 +147,37 @@ func getBuildVersion() string {
 	ver := fmt.Sprintf("%d.%d.%s.%d", major, minor, build, ubr)
 	return ver
 }
+
+func sysNumber() (string, error) {
+	var dst []Win32_BIOS
+	query := wmi.CreateQuery(&dst, "")
+	err := wmi.Query(query, &dst)
+	if err != nil {
+		return "", err
+	}
+	return dst[0].SerialNumber, nil
+}
+
+func sysProductName() (string, error) {
+	var dst []Win32_ComputerSystemProduct
+	query := wmi.CreateQuery(&dst, "")
+	err := wmi.Query(query, &dst)
+	if err != nil {
+		return "", err
+	}
+	// `ComputerSystemProduct` could be empty on some virtualized systems
+	if len(dst) < 1 {
+		return "unknown", nil
+	}
+	return dst[0].Name, nil
+}
+
+func sysManufacturer() (string, error) {
+	var dst []Win32_ComputerSystem
+	query := wmi.CreateQuery(&dst, "")
+	err := wmi.Query(query, &dst)
+	if err != nil {
+		return "", err
+	}
+	return dst[0].Manufacturer, nil
+}

client/system/info_windows_test.go

@@ -0,0 +1,25 @@
+package system
+
+import (
+	"testing"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func Test_sysInfo(t *testing.T) {
+	serialNum, err := sysNumber()
+	if err != nil {
+		t.Errorf("failed to get system serial number: %s", err)
+	}
+
+	prodName, err := sysProductName()
+	if err != nil {
+		t.Errorf("failed to get system product name: %s", err)
+	}
+
+	manufacturer, err := sysManufacturer()
+	if err != nil {
+		t.Errorf("failed to get system manufacturer: %s", err)
+	}
+	log.Infof("Windows sys info: %s, %s, %s", serialNum, prodName, manufacturer)
+}