merge main

client/android/client.go

@@ -8,8 +8,8 @@ import (
 
 	"github.com/netbirdio/netbird/client/internal"
 	"github.com/netbirdio/netbird/client/internal/dns"
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/peer"
-	"github.com/netbirdio/netbird/client/internal/routemanager"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
 	"github.com/netbirdio/netbird/client/system"
 	"github.com/netbirdio/netbird/formatter"
@@ -31,9 +31,9 @@ type IFaceDiscover interface {
 	stdnet.ExternalIFaceDiscover
 }
 
-// RouteListener export internal RouteListener for mobile
-type RouteListener interface {
-	routemanager.RouteListener
+// NetworkChangeListener export internal NetworkChangeListener for mobile
+type NetworkChangeListener interface {
+	listener.NetworkChangeListener
 }
 
 // DnsReadyListener export internal dns ReadyListener for mobile
@@ -47,26 +47,26 @@ func init() {
 
 // Client struct manage the life circle of background service
 type Client struct {
-	cfgFile       string
-	tunAdapter    iface.TunAdapter
-	iFaceDiscover IFaceDiscover
-	recorder      *peer.Status
-	ctxCancel     context.CancelFunc
-	ctxCancelLock *sync.Mutex
-	deviceName    string
-	routeListener routemanager.RouteListener
+	cfgFile               string
+	tunAdapter            iface.TunAdapter
+	iFaceDiscover         IFaceDiscover
+	recorder              *peer.Status
+	ctxCancel             context.CancelFunc
+	ctxCancelLock         *sync.Mutex
+	deviceName            string
+	networkChangeListener listener.NetworkChangeListener
 }
 
 // NewClient instantiate a new Client
-func NewClient(cfgFile, deviceName string, tunAdapter TunAdapter, iFaceDiscover IFaceDiscover, routeListener RouteListener) *Client {
+func NewClient(cfgFile, deviceName string, tunAdapter TunAdapter, iFaceDiscover IFaceDiscover, networkChangeListener NetworkChangeListener) *Client {
 	return &Client{
-		cfgFile:       cfgFile,
-		deviceName:    deviceName,
-		tunAdapter:    tunAdapter,
-		iFaceDiscover: iFaceDiscover,
-		recorder:      peer.NewRecorder(""),
-		ctxCancelLock: &sync.Mutex{},
-		routeListener: routeListener,
+		cfgFile:               cfgFile,
+		deviceName:            deviceName,
+		tunAdapter:            tunAdapter,
+		iFaceDiscover:         iFaceDiscover,
+		recorder:              peer.NewRecorder(""),
+		ctxCancelLock:         &sync.Mutex{},
+		networkChangeListener: networkChangeListener,
 	}
 }
 
@@ -96,7 +96,7 @@ func (c *Client) Run(urlOpener URLOpener, dns *DNSList, dnsReadyListener DnsRead
 
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.routeListener, dns.items, dnsReadyListener)
+	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, dns.items, dnsReadyListener)
 }
 
 // RunWithoutLogin we apply this type of run function when the backed has been started without UI (i.e. after reboot).
@@ -120,7 +120,7 @@ func (c *Client) RunWithoutLogin(dns *DNSList, dnsReadyListener DnsReadyListener
 
 	// todo do not throw error in case of cancelled context
 	ctx = internal.CtxInitState(ctx)
-	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.routeListener, dns.items, dnsReadyListener)
+	return internal.RunClientMobile(ctx, cfg, c.recorder, c.tunAdapter, c.iFaceDiscover, c.networkChangeListener, dns.items, dnsReadyListener)
 }
 
 // Stop the internal client and free the resources

client/android/preferences_test.go

@@ -57,11 +57,11 @@ func TestPreferences_ReadUncommitedValues(t *testing.T) {
 	p.SetManagementURL(exampleString)
 	resp, err = p.GetManagementURL()
 	if err != nil {
-		t.Fatalf("failed to read managmenet url: %s", err)
+		t.Fatalf("failed to read management url: %s", err)
 	}
 
 	if resp != exampleString {
-		t.Errorf("unexpected managemenet url: %s", resp)
+		t.Errorf("unexpected management url: %s", resp)
 	}
 
 	p.SetPreSharedKey(exampleString)
@@ -102,11 +102,11 @@ func TestPreferences_Commit(t *testing.T) {
 
 	resp, err = p.GetManagementURL()
 	if err != nil {
-		t.Fatalf("failed to read managmenet url: %s", err)
+		t.Fatalf("failed to read management url: %s", err)
 	}
 
 	if resp != exampleURL {
-		t.Errorf("unexpected managemenet url: %s", resp)
+		t.Errorf("unexpected management url: %s", resp)
 	}
 
 	resp, err = p.GetPreSharedKey()

client/cmd/testutil.go

@@ -65,7 +65,7 @@ func startManagement(t *testing.T, config *mgmt.Config) (*grpc.Server, net.Liste
 		t.Fatal(err)
 	}
 	s := grpc.NewServer()
-	store, err := mgmt.NewFileStore(config.Datadir, nil)
+	store, err := mgmt.NewStoreFromJson(config.Datadir, nil)
 	if err != nil {
 		t.Fatal(err)
 	}

client/cmd/up.go

@@ -123,7 +123,7 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command) error {
 	defer func() {
 		err := conn.Close()
 		if err != nil {
-			log.Warnf("failed closing dameon gRPC client connection %v", err)
+			log.Warnf("failed closing daemon gRPC client connection %v", err)
 			return
 		}
 	}()
@@ -200,11 +200,11 @@ func validateNATExternalIPs(list []string) error {
 
 		subElements := strings.Split(element, "/")
 		if len(subElements) > 2 {
-			return fmt.Errorf("%s is not a valid input for %s. it should be formated as \"String\" or \"String/String\"", element, externalIPMapFlag)
+			return fmt.Errorf("%s is not a valid input for %s. it should be formatted as \"String\" or \"String/String\"", element, externalIPMapFlag)
 		}
 
 		if len(subElements) == 1 && !isValidIP(subElements[0]) {
-			return fmt.Errorf("%s is not a valid input for %s. it should be formated as \"IP\" or \"IP/IP\", or \"IP/Interface Name\"", element, externalIPMapFlag)
+			return fmt.Errorf("%s is not a valid input for %s. it should be formatted as \"IP\" or \"IP/IP\", or \"IP/Interface Name\"", element, externalIPMapFlag)
 		}
 
 		last := 0
@@ -259,7 +259,7 @@ func parseCustomDNSAddress(modified bool) ([]byte, error) {
 	var parsed []byte
 	if modified {
 		if !isValidAddrPort(customDNSAddress) {
-			return nil, fmt.Errorf("%s is invalid, it should be formated as IP:Port string or as an empty string like \"\"", customDNSAddress)
+			return nil, fmt.Errorf("%s is invalid, it should be formatted as IP:Port string or as an empty string like \"\"", customDNSAddress)
 		}
 		if customDNSAddress == "" && logFile != "console" {
 			parsed = []byte("empty")

client/firewall/iptables/manager_linux.go

@@ -192,7 +192,7 @@ func (m *Manager) AddFiltering(
 	}
 	if ipsetName != "" {
 		// ipset name is defined and it means that this rule was created
-		// for it, need to assosiate it with ruleset
+		// for it, need to associate it with ruleset
 		m.rulesets[ipsetName] = ruleset{
 			rule: rule,
 			ips:  map[string]string{rule.ip: ruleID},
@@ -236,7 +236,7 @@ func (m *Manager) DeleteRule(rule fw.Rule) error {
 		}
 
 		// we delete last IP from the set, that means we need to delete
-		// set itself and assosiated firewall rule too
+		// set itself and associated firewall rule too
 		delete(m.rulesets, r.ipsetName)
 
 		if err := ipset.Destroy(r.ipsetName); err != nil {

client/firewall/nftables/manager_linux.go

@@ -754,7 +754,7 @@ func (m *Manager) AllowNetbird() error {
 	}
 
 	if chain == nil {
-		log.Debugf("chain INPUT not found. Skiping add allow netbird rule")
+		log.Debugf("chain INPUT not found. Skipping add allow netbird rule")
 		return nil
 	}
 

client/firewall/nftables/manager_linux_test.go

@@ -148,7 +148,7 @@ func TestNftablesManager(t *testing.T) {
 	// test expectations:
 	// 1) "accept extra routed traffic rule" for the interface
 	// 2) "drop all rule" for the interface
-	require.Len(t, rules, 2, "expected 2 rules after deleteion")
+	require.Len(t, rules, 2, "expected 2 rules after deletion")
 
 	err = manager.Reset()
 	require.NoError(t, err, "failed to reset")

client/firewall/uspfilter/allow_netbird_windows.go

@@ -1,21 +1,19 @@
 package uspfilter
 
 import (
-	"errors"
 	"fmt"
 	"os/exec"
-	"strings"
 	"syscall"
+
+	log "github.com/sirupsen/logrus"
 )
 
 type action string
 
 const (
-	addRule    action = "add"
-	deleteRule action = "delete"
-
-	firewallRuleName     = "Netbird"
-	noRulesMatchCriteria = "No rules match the specified criteria"
+	addRule          action = "add"
+	deleteRule       action = "delete"
+	firewallRuleName        = "Netbird"
 )
 
 // Reset firewall to the default state
@@ -26,6 +24,14 @@ func (m *Manager) Reset() error {
 	m.outgoingRules = make(map[string]RuleSet)
 	m.incomingRules = make(map[string]RuleSet)
 
+	if !isWindowsFirewallReachable() {
+		return nil
+	}
+
+	if !isFirewallRuleActive(firewallRuleName) {
+		return nil
+	}
+
 	if err := manageFirewallRule(firewallRuleName, deleteRule); err != nil {
 		return fmt.Errorf("couldn't remove windows firewall: %w", err)
 	}
@@ -35,6 +41,13 @@ func (m *Manager) Reset() error {
 
 // AllowNetbird allows netbird interface traffic
 func (m *Manager) AllowNetbird() error {
+	if !isWindowsFirewallReachable() {
+		return nil
+	}
+
+	if isFirewallRuleActive(firewallRuleName) {
+		return nil
+	}
 	return manageFirewallRule(firewallRuleName,
 		addRule,
 		"dir=in",
@@ -45,47 +58,37 @@ func (m *Manager) AllowNetbird() error {
 	)
 }
 
-func manageFirewallRule(ruleName string, action action, args ...string) error {
-	active, err := isFirewallRuleActive(ruleName)
-	if err != nil {
-		return err
+func manageFirewallRule(ruleName string, action action, extraArgs ...string) error {
+
+	args := []string{"advfirewall", "firewall", string(action), "rule", "name=" + ruleName}
+	if action == addRule {
+		args = append(args, extraArgs...)
 	}
 
-	if (action == addRule && !active) || (action == deleteRule && active) {
-		baseArgs := []string{"advfirewall", "firewall", string(action), "rule", "name=" + ruleName}
-		args := append(baseArgs, args...)
-
-		cmd := exec.Command("netsh", args...)
-		cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
-		return cmd.Run()
-	}
-
-	return nil
+	cmd := exec.Command("netsh", args...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
+	return cmd.Run()
 }
 
-func isFirewallRuleActive(ruleName string) (bool, error) {
+func isWindowsFirewallReachable() bool {
+	args := []string{"advfirewall", "show", "allprofiles", "state"}
+	cmd := exec.Command("netsh", args...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
+
+	_, err := cmd.Output()
+	if err != nil {
+		log.Infof("Windows firewall is not reachable, skipping default rule management. Using only user space rules. Error: %s", err)
+		return false
+	}
+
+	return true
+}
+
+func isFirewallRuleActive(ruleName string) bool {
 	args := []string{"advfirewall", "firewall", "show", "rule", "name=" + ruleName}
 
 	cmd := exec.Command("netsh", args...)
 	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true}
-	output, err := cmd.Output()
-	if err != nil {
-		var exitError *exec.ExitError
-		if errors.As(err, &exitError) {
-			// if the firewall rule is not active, we expect last exit code to be 1
-			exitStatus := exitError.Sys().(syscall.WaitStatus).ExitStatus()
-			if exitStatus == 1 {
-				if strings.Contains(string(output), noRulesMatchCriteria) {
-					return false, nil
-				}
-			}
-		}
-		return false, err
-	}
-
-	if strings.Contains(string(output), noRulesMatchCriteria) {
-		return false, nil
-	}
-
-	return true, nil
+	_, err := cmd.Output()
+	return err == nil
 }

client/firewall/uspfilter/uspfilter.go

@@ -32,7 +32,7 @@ type Manager struct {
 	wgNetwork     *net.IPNet
 	decoders      sync.Pool
 	wgIface       IFaceMapper
-	resetHook func() error
+	resetHook     func() error
 
 	mutex sync.RWMutex
 }
@@ -188,7 +188,7 @@ func (m *Manager) DropIncoming(packetData []byte) bool {
 	return m.dropFilter(packetData, m.incomingRules, true)
 }
 
-// dropFilter imlements same logic for booth direction of the traffic
+// dropFilter implements same logic for booth direction of the traffic
 func (m *Manager) dropFilter(packetData []byte, rules map[string]RuleSet, isIncomingPacket bool) bool {
 	m.mutex.RLock()
 	defer m.mutex.RUnlock()

client/internal/acl/manager.go

@@ -53,7 +53,7 @@ func newDefaultManager(fm firewall.Manager) *DefaultManager {
 
 // ApplyFiltering firewall rules to the local firewall manager processed by ACL policy.
 //
-// If allowByDefault is ture it appends allow ALL traffic rules to input and output chains.
+// If allowByDefault is true it appends allow ALL traffic rules to input and output chains.
 func (d *DefaultManager) ApplyFiltering(networkMap *mgmProto.NetworkMap) {
 	d.mutex.Lock()
 	defer d.mutex.Unlock()
@@ -366,7 +366,7 @@ func (d *DefaultManager) squashAcceptRules(
 			protocols[r.Protocol] = map[string]int{}
 		}
 
-		// special case, when we recieve this all network IP address
+		// special case, when we receive this all network IP address
 		// it means that rules for that protocol was already optimized on the
 		// management side
 		if r.PeerIP == "0.0.0.0" {
@@ -393,7 +393,7 @@ func (d *DefaultManager) squashAcceptRules(
 	}
 
 	// order of squashing by protocol is important
-	// only for ther first element ALL, it must be done first
+	// only for their first element ALL, it must be done first
 	protocolOrders := []mgmProto.FirewallRuleProtocol{
 		mgmProto.FirewallRule_ALL,
 		mgmProto.FirewallRule_ICMP,

client/internal/acl/manager_create.go

@@ -20,7 +20,7 @@ func Create(iface IFaceMapper) (manager *DefaultManager, err error) {
 			return nil, err
 		}
 		if err := fm.AllowNetbird(); err != nil {
-			log.Errorf("failed to allow netbird interface traffic: %v", err)
+			log.Warnf("failed to allow netbird interface traffic: %v", err)
 		}
 		return newDefaultManager(fm), nil
 	}

client/internal/connect.go

@@ -13,8 +13,8 @@ import (
 	gstatus "google.golang.org/grpc/status"
 
 	"github.com/netbirdio/netbird/client/internal/dns"
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/peer"
-	"github.com/netbirdio/netbird/client/internal/routemanager"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
 	"github.com/netbirdio/netbird/client/ssh"
 	"github.com/netbirdio/netbird/client/system"
@@ -22,6 +22,7 @@ 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/version"
 )
 
 // RunClient with main logic.
@@ -30,14 +31,14 @@ func RunClient(ctx context.Context, config *Config, statusRecorder *peer.Status)
 }
 
 // RunClientMobile with main logic on mobile system
-func RunClientMobile(ctx context.Context, config *Config, statusRecorder *peer.Status, tunAdapter iface.TunAdapter, iFaceDiscover stdnet.ExternalIFaceDiscover, routeListener routemanager.RouteListener, 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,
-		IFaceDiscover:    iFaceDiscover,
-		RouteListener:    routeListener,
-		HostDNSAddresses: dnsAddresses,
-		DnsReadyListener: dnsReadyListener,
+		TunAdapter:            tunAdapter,
+		IFaceDiscover:         iFaceDiscover,
+		NetworkChangeListener: networkChangeListener,
+		HostDNSAddresses:      dnsAddresses,
+		DnsReadyListener:      dnsReadyListener,
 	}
 	return runClient(ctx, config, statusRecorder, mobileDependency)
 }
@@ -53,6 +54,8 @@ func RunClientiOS(ctx context.Context, config *Config, statusRecorder *peer.Stat
 }
 
 func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status, mobileDependency MobileDependency) error {
+	log.Infof("starting NetBird client version %s", version.NetbirdVersion())
+
 	backOff := &backoff.ExponentialBackOff{
 		InitialInterval:     time.Second,
 		RandomizationFactor: 1,
@@ -106,7 +109,7 @@ func runClient(ctx context.Context, config *Config, statusRecorder *peer.Status,
 			cancel()
 		}()
 
-		log.Debugf("conecting to the Management service %s", config.ManagementURL.Host)
+		log.Debugf("connecting to the Management service %s", config.ManagementURL.Host)
 		mgmClient, err := mgm.NewClient(engineCtx, config.ManagementURL.Host, myPrivateKey, mgmTlsEnabled)
 		if err != nil {
 			return wrapErr(gstatus.Errorf(codes.FailedPrecondition, "failed connecting to Management Service : %s", err))

client/internal/dns/file_linux.go

@@ -3,29 +3,25 @@
 package dns
 
 import (
+	"bufio"
 	"bytes"
 	"fmt"
 	"os"
+	"strings"
 
 	log "github.com/sirupsen/logrus"
 )
 
 const (
-	fileGeneratedResolvConfContentHeader      = "# Generated by NetBird"
-	fileGeneratedResolvConfSearchBeginContent = "search "
-	fileGeneratedResolvConfContentFormat      = fileGeneratedResolvConfContentHeader +
-		"\n# If needed you can restore the original file by copying back %s\n\nnameserver %s\n" +
-		fileGeneratedResolvConfSearchBeginContent + "%s\n\n" +
-		"%s\n"
-)
+	fileGeneratedResolvConfContentHeader         = "# Generated by NetBird"
+	fileGeneratedResolvConfContentHeaderNextLine = fileGeneratedResolvConfContentHeader + `
+# If needed you can restore the original file by copying back ` + fileDefaultResolvConfBackupLocation + "\n\n"
 
-const (
 	fileDefaultResolvConfBackupLocation = defaultResolvConfPath + ".original.netbird"
-	fileMaxLineCharsLimit               = 256
-	fileMaxNumberOfSearchDomains        = 6
-)
 
-var fileSearchLineBeginCharCount = len(fileGeneratedResolvConfSearchBeginContent)
+	fileMaxLineCharsLimit        = 256
+	fileMaxNumberOfSearchDomains = 6
+)
 
 type fileConfigurator struct {
 	originalPerms os.FileMode
@@ -55,58 +51,39 @@ func (f *fileConfigurator) applyDNSConfig(config HostDNSConfig) error {
 		}
 		return fmt.Errorf("unable to configure DNS for this peer using file manager without a nameserver group with all domains configured")
 	}
-	managerType, err := getOSDNSManagerType()
-	if err != nil {
-		return err
-	}
-	switch managerType {
-	case fileManager, netbirdManager:
-		if !backupFileExist {
-			err = f.backup()
-			if err != nil {
-				return fmt.Errorf("unable to backup the resolv.conf file")
-			}
-		}
-	default:
-		// todo improve this and maybe restart DNS manager from scratch
-		return fmt.Errorf("something happened and file manager is not your prefered host dns configurator, restart the agent")
-	}
 
-	var searchDomains string
-	appendedDomains := 0
-	for _, dConf := range config.domains {
-		if dConf.matchOnly || dConf.disabled {
-			continue
-		}
-		if appendedDomains >= fileMaxNumberOfSearchDomains {
-			// lets log all skipped domains
-			log.Infof("already appended %d domains to search list. Skipping append of %s domain", fileMaxNumberOfSearchDomains, dConf.domain)
-			continue
-		}
-		if fileSearchLineBeginCharCount+len(searchDomains) > fileMaxLineCharsLimit {
-			// lets log all skipped domains
-			log.Infof("search list line is larger than %d characters. Skipping append of %s domain", fileMaxLineCharsLimit, dConf.domain)
-			continue
-		}
-
-		searchDomains += " " + dConf.domain
-		appendedDomains++
-	}
-
-	originalContent, err := os.ReadFile(fileDefaultResolvConfBackupLocation)
-	if err != nil {
-		log.Errorf("Could not read existing resolv.conf")
-	}
-	content := fmt.Sprintf(fileGeneratedResolvConfContentFormat, fileDefaultResolvConfBackupLocation, config.serverIP, searchDomains, string(originalContent))
-	err = writeDNSConfig(content, defaultResolvConfPath, f.originalPerms)
-	if err != nil {
-		err = f.restore()
+	if !backupFileExist {
+		err = f.backup()
 		if err != nil {
+			return fmt.Errorf("unable to backup the resolv.conf file")
+		}
+	}
+
+	searchDomainList := searchDomains(config)
+
+	originalSearchDomains, nameServers, others, err := originalDNSConfigs(fileDefaultResolvConfBackupLocation)
+	if err != nil {
+		log.Error(err)
+	}
+
+	searchDomainList = mergeSearchDomains(searchDomainList, originalSearchDomains)
+
+	buf := prepareResolvConfContent(
+		searchDomainList,
+		append([]string{config.serverIP}, nameServers...),
+		others)
+
+	log.Debugf("creating managed file %s", defaultResolvConfPath)
+	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 err
+		return fmt.Errorf("got an creating resolver file %s. Error: %s", defaultResolvConfPath, err)
 	}
-	log.Infof("created a NetBird managed %s file with your DNS settings. Added %d search domains. Search list: %s", defaultResolvConfPath, appendedDomains, searchDomains)
+
+	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
 }
 
@@ -138,15 +115,138 @@ func (f *fileConfigurator) restore() error {
 	return os.RemoveAll(fileDefaultResolvConfBackupLocation)
 }
 
-func writeDNSConfig(content, fileName string, permissions os.FileMode) error {
-	log.Debugf("creating managed file %s", fileName)
+func prepareResolvConfContent(searchDomains, nameServers, others []string) bytes.Buffer {
 	var buf bytes.Buffer
-	buf.WriteString(content)
-	err := os.WriteFile(fileName, buf.Bytes(), permissions)
-	if err != nil {
-		return fmt.Errorf("got an creating resolver file %s. Error: %s", fileName, err)
+	buf.WriteString(fileGeneratedResolvConfContentHeaderNextLine)
+
+	for _, cfgLine := range others {
+		buf.WriteString(cfgLine)
+		buf.WriteString("\n")
 	}
-	return nil
+
+	if len(searchDomains) > 0 {
+		buf.WriteString("search ")
+		buf.WriteString(strings.Join(searchDomains, " "))
+		buf.WriteString("\n")
+	}
+
+	for _, ns := range nameServers {
+		buf.WriteString("nameserver ")
+		buf.WriteString(ns)
+		buf.WriteString("\n")
+	}
+	return buf
+}
+
+func searchDomains(config hostDNSConfig) []string {
+	listOfDomains := make([]string, 0)
+	for _, dConf := range config.domains {
+		if dConf.matchOnly || dConf.disabled {
+			continue
+		}
+
+		listOfDomains = append(listOfDomains, dConf.domain)
+	}
+	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")
+	searchDomainsList := make([]string, 0, len(searchDomains)+len(originalSearchDomains))
+
+	lineSize = validateAndFillSearchDomains(lineSize, &searchDomainsList, searchDomains)
+	_ = validateAndFillSearchDomains(lineSize, &searchDomainsList, originalSearchDomains)
+
+	return searchDomainsList
+}
+
+// validateAndFillSearchDomains checks if the search domains list is not too long and if the line is not too long
+// extend s slice with vs elements
+// return with the number of characters in the searchDomains line
+func validateAndFillSearchDomains(initialLineChars int, s *[]string, vs []string) int {
+	for _, sd := range vs {
+		tmpCharsNumber := initialLineChars + 1 + len(sd)
+		if tmpCharsNumber > fileMaxLineCharsLimit {
+			// lets log all skipped domains
+			log.Infof("search list line is larger than %d characters. Skipping append of %s domain", fileMaxLineCharsLimit, sd)
+			continue
+		}
+
+		initialLineChars = tmpCharsNumber
+
+		if len(*s) >= fileMaxNumberOfSearchDomains {
+			// lets log all skipped domains
+			log.Infof("already appended %d domains to search list. Skipping append of %s domain", fileMaxNumberOfSearchDomains, sd)
+			continue
+		}
+		*s = append(*s, sd)
+	}
+	return initialLineChars
 }
 
 func copyFile(src, dest string) error {

client/internal/dns/file_linux_test.go

@@ -0,0 +1,62 @@
+package dns
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Test_mergeSearchDomains(t *testing.T) {
+	searchDomains := []string{"a", "b"}
+	originDomains := []string{"a", "b"}
+	mergedDomains := mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 4 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 4)
+	}
+}
+
+func Test_mergeSearchTooMuchDomains(t *testing.T) {
+	searchDomains := []string{"a", "b", "c", "d", "e", "f", "g"}
+	originDomains := []string{"h", "i"}
+	mergedDomains := mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 6 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 6)
+	}
+}
+
+func Test_mergeSearchTooMuchDomainsInOrigin(t *testing.T) {
+	searchDomains := []string{"a", "b"}
+	originDomains := []string{"c", "d", "e", "f", "g"}
+	mergedDomains := mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 6 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 6)
+	}
+}
+
+func Test_mergeSearchTooLongDomain(t *testing.T) {
+	searchDomains := []string{getLongLine()}
+	originDomains := []string{"b"}
+	mergedDomains := mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 1 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 1)
+	}
+
+	searchDomains = []string{"b"}
+	originDomains = []string{getLongLine()}
+
+	mergedDomains = mergeSearchDomains(searchDomains, originDomains)
+	if len(mergedDomains) != 1 {
+		t.Errorf("invalid len of result domains: %d, want: %d", len(mergedDomains), 1)
+	}
+}
+
+func getLongLine() string {
+	x := "search "
+	for {
+		for i := 0; i <= 9; i++ {
+			if len(x) > fileMaxLineCharsLimit {
+				return x
+			}
+			x = fmt.Sprintf("%s%d", x, i)
+		}
+	}
+}

client/internal/dns/host.go

@@ -78,7 +78,7 @@ func dnsConfigToHostDNSConfig(dnsConfig nbdns.Config, ip string, port int) HostD
 		for _, domain := range nsConfig.Domains {
 			config.domains = append(config.domains, domainConfig{
 				domain:    strings.TrimSuffix(domain, "."),
-				matchOnly: true,
+				matchOnly: !nsConfig.SearchDomainsEnabled,
 			})
 		}
 	}

client/internal/dns/host_windows.go

@@ -22,13 +22,11 @@ const (
 	interfaceConfigPath          = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces"
 	interfaceConfigNameServerKey = "NameServer"
 	interfaceConfigSearchListKey = "SearchList"
-	tcpipParametersPath          = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters"
 )
 
 type registryConfigurator struct {
-	guid                  string
-	routingAll            bool
-	existingSearchDomains []string
+	guid       string
+	routingAll bool
 }
 
 func newHostManager(wgInterface WGIface) (hostManager, error) {
@@ -148,30 +146,11 @@ func (r *registryConfigurator) restoreHostDNS() error {
 		log.Error(err)
 	}
 
-	return r.updateSearchDomains([]string{})
+	return r.deleteInterfaceRegistryKeyProperty(interfaceConfigSearchListKey)
 }
 
 func (r *registryConfigurator) updateSearchDomains(domains []string) error {
-	value, err := getLocalMachineRegistryKeyStringValue(tcpipParametersPath, interfaceConfigSearchListKey)
-	if err != nil {
-		return fmt.Errorf("unable to get current search domains failed with error: %s", err)
-	}
-
-	valueList := strings.Split(value, ",")
-	setExisting := false
-	if len(r.existingSearchDomains) == 0 {
-		r.existingSearchDomains = valueList
-		setExisting = true
-	}
-
-	if len(domains) == 0 && setExisting {
-		log.Infof("added %d search domains to the registry. Domain list: %s", len(domains), domains)
-		return nil
-	}
-
-	newList := append(r.existingSearchDomains, domains...)
-
-	err = setLocalMachineRegistryKeyStringValue(tcpipParametersPath, interfaceConfigSearchListKey, strings.Join(newList, ","))
+	err := r.setInterfaceRegistryKeyStringValue(interfaceConfigSearchListKey, strings.Join(domains, ","))
 	if err != nil {
 		return fmt.Errorf("adding search domain failed with error: %s", err)
 	}
@@ -235,33 +214,3 @@ func removeRegistryKeyFromDNSPolicyConfig(regKeyPath string) error {
 	}
 	return nil
 }
-
-func getLocalMachineRegistryKeyStringValue(keyPath, key string) (string, error) {
-	regKey, err := registry.OpenKey(registry.LOCAL_MACHINE, keyPath, registry.QUERY_VALUE)
-	if err != nil {
-		return "", fmt.Errorf("unable to open existing key from registry, key path: HKEY_LOCAL_MACHINE\\%s, error: %s", keyPath, err)
-	}
-	defer regKey.Close()
-
-	val, _, err := regKey.GetStringValue(key)
-	if err != nil {
-		return "", fmt.Errorf("getting %s value for key path HKEY_LOCAL_MACHINE\\%s failed with error: %s", key, keyPath, err)
-	}
-
-	return val, nil
-}
-
-func setLocalMachineRegistryKeyStringValue(keyPath, key, value string) error {
-	regKey, err := registry.OpenKey(registry.LOCAL_MACHINE, keyPath, registry.SET_VALUE)
-	if err != nil {
-		return fmt.Errorf("unable to open existing key from registry, key path: HKEY_LOCAL_MACHINE\\%s, error: %s", keyPath, err)
-	}
-	defer regKey.Close()
-
-	err = regKey.SetStringValue(key, value)
-	if err != nil {
-		return fmt.Errorf("setting %s value %s for key path HKEY_LOCAL_MACHINE\\%s failed with error: %s", key, value, keyPath, err)
-	}
-
-	return nil
-}

client/internal/dns/mockServer.go

@@ -2,6 +2,7 @@ package dns
 
 import (
 	"fmt"
+
 	nbdns "github.com/netbirdio/netbird/dns"
 )
 
@@ -43,3 +44,7 @@ func (m *MockServer) UpdateDNSServer(serial uint64, update nbdns.Config) error {
 	}
 	return fmt.Errorf("method UpdateDNSServer is not implemented")
 }
+
+func (m *MockServer) SearchDomains() []string {
+	return make([]string, 0)
+}

client/internal/dns/notifier.go

@@ -0,0 +1,57 @@
+package dns
+
+import (
+	"reflect"
+	"sort"
+	"sync"
+
+	"github.com/netbirdio/netbird/client/internal/listener"
+)
+
+type notifier struct {
+	listener      listener.NetworkChangeListener
+	listenerMux   sync.Mutex
+	searchDomains []string
+}
+
+func newNotifier(initialSearchDomains []string) *notifier {
+	sort.Strings(initialSearchDomains)
+	return &notifier{
+		searchDomains: initialSearchDomains,
+	}
+}
+
+func (n *notifier) setListener(listener listener.NetworkChangeListener) {
+	n.listenerMux.Lock()
+	defer n.listenerMux.Unlock()
+	n.listener = listener
+}
+
+func (n *notifier) onNewSearchDomains(searchDomains []string) {
+	sort.Strings(searchDomains)
+
+	if len(n.searchDomains) != len(searchDomains) {
+		n.searchDomains = searchDomains
+		n.notify()
+		return
+	}
+
+	if reflect.DeepEqual(n.searchDomains, searchDomains) {
+		return
+	}
+
+	n.searchDomains = searchDomains
+	n.notify()
+}
+
+func (n *notifier) notify() {
+	n.listenerMux.Lock()
+	defer n.listenerMux.Unlock()
+	if n.listener == nil {
+		return
+	}
+
+	go func(l listener.NetworkChangeListener) {
+		l.OnNetworkChanged()
+	}(n.listener)
+}

client/internal/dns/resolvconf_linux.go

@@ -3,10 +3,9 @@
 package dns
 
 import (
+	"bytes"
 	"fmt"
-	"os"
 	"os/exec"
-	"strings"
 
 	log "github.com/sirupsen/logrus"
 )
@@ -15,11 +14,24 @@ const resolvconfCommand = "resolvconf"
 
 type resolvconf struct {
 	ifaceName string
+
+	originalSearchDomains []string
+	originalNameServers   []string
+	othersConfigs         []string
 }
 
+// supported "openresolv" only
 func newResolvConfConfigurator(wgInterface WGIface) (hostManager, error) {
+	originalSearchDomains, nameServers, others, err := originalDNSConfigs("/etc/resolv.conf")
+	if err != nil {
+		log.Error(err)
+	}
+
 	return &resolvconf{
-		ifaceName: wgInterface.Name(),
+		ifaceName:             wgInterface.Name(),
+		originalSearchDomains: originalSearchDomains,
+		originalNameServers:   nameServers,
+		othersConfigs:         others,
 	}, nil
 }
 
@@ -37,41 +49,20 @@ func (r *resolvconf) applyDNSConfig(config HostDNSConfig) error {
 		return fmt.Errorf("unable to configure DNS for this peer using resolvconf manager without a nameserver group with all domains configured")
 	}
 
-	var searchDomains string
-	appendedDomains := 0
-	for _, dConf := range config.domains {
-		if dConf.matchOnly || dConf.disabled {
-			continue
-		}
+	searchDomainList := searchDomains(config)
+	searchDomainList = mergeSearchDomains(searchDomainList, r.originalSearchDomains)
 
-		if appendedDomains >= fileMaxNumberOfSearchDomains {
-			// lets log all skipped domains
-			log.Infof("already appended %d domains to search list. Skipping append of %s domain", fileMaxNumberOfSearchDomains, dConf.domain)
-			continue
-		}
+	buf := prepareResolvConfContent(
+		searchDomainList,
+		append([]string{config.serverIP}, r.originalNameServers...),
+		r.othersConfigs)
 
-		if fileSearchLineBeginCharCount+len(searchDomains) > fileMaxLineCharsLimit {
-			// lets log all skipped domains
-			log.Infof("search list line is larger than %d characters. Skipping append of %s domain", fileMaxLineCharsLimit, dConf.domain)
-			continue
-		}
-
-		searchDomains += " " + dConf.domain
-		appendedDomains++
-	}
-
-	originalContent, err := os.ReadFile(fileDefaultResolvConfBackupLocation)
-	if err != nil {
-		log.Errorf("Could not read existing resolv.conf")
-	}
-	content := fmt.Sprintf(fileGeneratedResolvConfContentFormat, fileDefaultResolvConfBackupLocation, config.serverIP, searchDomains, string(originalContent))
-
-	err = r.applyConfig(content)
+	err = r.applyConfig(buf)
 	if err != nil {
 		return err
 	}
 
-	log.Infof("added %d search domains. Search list: %s", appendedDomains, searchDomains)
+	log.Infof("added %d search domains. Search list: %s", len(searchDomainList), searchDomainList)
 	return nil
 }
 
@@ -84,12 +75,12 @@ func (r *resolvconf) restoreHostDNS() error {
 	return nil
 }
 
-func (r *resolvconf) applyConfig(content string) error {
+func (r *resolvconf) applyConfig(content bytes.Buffer) error {
 	cmd := exec.Command(resolvconfCommand, "-x", "-a", r.ifaceName)
-	cmd.Stdin = strings.NewReader(content)
+	cmd.Stdin = &content
 	_, err := cmd.Output()
 	if err != nil {
-		return fmt.Errorf("got an error while appying resolvconf configuration for %s interface, error: %s", r.ifaceName, err)
+		return fmt.Errorf("got an error while applying resolvconf configuration for %s interface, error: %s", r.ifaceName, err)
 	}
 	return nil
 }

client/internal/dns/server.go

@@ -4,13 +4,13 @@ import (
 	"context"
 	"fmt"
 	"net/netip"
-	"runtime"
 	"sync"
 
 	"github.com/miekg/dns"
 	"github.com/mitchellh/hashstructure/v2"
 	log "github.com/sirupsen/logrus"
 
+	"github.com/netbirdio/netbird/client/internal/listener"
 	nbdns "github.com/netbirdio/netbird/dns"
 )
 
@@ -31,6 +31,7 @@ type Server interface {
 	DnsIP() string
 	UpdateDNSServer(serial uint64, update nbdns.Config) error
 	OnUpdatedHostDNSServer(strings []string)
+	SearchDomains() []string
 }
 
 type registeredHandlerMap map[string]handlerWithStop
@@ -56,6 +57,9 @@ type DefaultServer struct {
 
 	interfaceName string
 	wgAddr        string
+
+	// make sense on mobile only
+	searchDomainNotifier *notifier
 }
 
 type handlerWithStop interface {
@@ -90,12 +94,15 @@ func NewDefaultServer(ctx context.Context, wgInterface WGIface, customAddress st
 }
 
 // NewDefaultServerPermanentUpstream returns a new dns server. It optimized for mobile systems
-func NewDefaultServerPermanentUpstream(ctx context.Context, wgInterface WGIface, hostsDnsList []string) *DefaultServer {
+func NewDefaultServerPermanentUpstream(ctx context.Context, wgInterface WGIface, hostsDnsList []string, config nbdns.Config, listener listener.NetworkChangeListener) *DefaultServer {
 	log.Debugf("host dns address list is: %v", hostsDnsList)
 	ds := newDefaultServer(ctx, wgInterface, newServiceViaMemory(wgInterface), "", "")
 	ds.permanent = true
 	ds.hostsDnsList = hostsDnsList
 	ds.addHostRootZone()
+	ds.currentConfig = dnsConfigToHostDNSConfig(config, ds.service.RuntimeIP(), ds.service.RuntimePort())
+	ds.searchDomainNotifier = newNotifier(ds.SearchDomains())
+	ds.searchDomainNotifier.setListener(listener)
 	setServerDns(ds)
 	return ds
 }
@@ -227,6 +234,21 @@ func (s *DefaultServer) UpdateDNSServer(serial uint64, update nbdns.Config) erro
 	}
 }
 
+func (s *DefaultServer) SearchDomains() []string {
+	var searchDomains []string
+
+	for _, dConf := range s.currentConfig.domains {
+		if dConf.disabled {
+			continue
+		}
+		if dConf.matchOnly {
+			continue
+		}
+		searchDomains = append(searchDomains, dConf.domain)
+	}
+	return searchDomains
+}
+
 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
@@ -261,6 +283,10 @@ func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
 		log.Error(err)
 	}
 
+	if s.searchDomainNotifier != nil {
+		s.searchDomainNotifier.onNewSearchDomains(s.SearchDomains())
+	}
+
 	return nil
 }
 
@@ -303,7 +329,7 @@ func (s *DefaultServer) buildUpstreamHandlerUpdate(nameServerGroups []*nbdns.Nam
 		handler := newUpstreamResolver(s.ctx, s.interfaceName, s.wgAddr)
 		for _, ns := range nsGroup.NameServers {
 			if ns.NSType != nbdns.UDPNameServerType {
-				log.Warnf("skiping nameserver %s with type %s, this peer supports only %s",
+				log.Warnf("skipping nameserver %s with type %s, this peer supports only %s",
 					ns.IP.String(), ns.NSType.String(), nbdns.UDPNameServerType.String())
 				continue
 			}
@@ -321,7 +347,7 @@ func (s *DefaultServer) buildUpstreamHandlerUpdate(nameServerGroups []*nbdns.Nam
 		// reapply DNS settings, but it not touch the original configuration and serial number
 		// because it is temporal deactivation until next try
 		//
-		// after some period defined by upstream it trys to reactivate self by calling this hook
+		// after some period defined by upstream it tries to reactivate self by calling this hook
 		// everything we need here is just to re-apply current configuration because it already
 		// contains this upstream settings (temporal deactivation not removed it)
 		handler.deactivate, handler.reactivate = s.upstreamCallbacks(nsGroup, handler)

client/internal/dns/server_export_test.go

@@ -19,6 +19,6 @@ func TestGetServerDns(t *testing.T) {
 	}
 
 	if srvB != srv {
-		t.Errorf("missmatch dns instances")
+		t.Errorf("mismatch dns instances")
 	}
 }

client/internal/dns/server_test.go

@@ -593,7 +593,8 @@ func TestDNSPermanent_updateHostDNS_emptyUpstream(t *testing.T) {
 	defer wgIFace.Close()
 
 	var dnsList []string
-	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, dnsList)
+	dnsConfig := nbdns.Config{}
+	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, dnsList, dnsConfig, nil)
 	err = dnsServer.Initialize()
 	if err != nil {
 		t.Errorf("failed to initialize DNS server: %v", err)
@@ -616,8 +617,8 @@ func TestDNSPermanent_updateUpstream(t *testing.T) {
 		t.Fatal("failed to initialize wg interface")
 	}
 	defer wgIFace.Close()
-
-	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"})
+	dnsConfig := nbdns.Config{}
+	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"}, dnsConfig, nil)
 	err = dnsServer.Initialize()
 	if err != nil {
 		t.Errorf("failed to initialize DNS server: %v", err)
@@ -708,8 +709,8 @@ func TestDNSPermanent_matchOnly(t *testing.T) {
 		t.Fatal("failed to initialize wg interface")
 	}
 	defer wgIFace.Close()
-
-	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"})
+	dnsConfig := nbdns.Config{}
+	dnsServer := NewDefaultServerPermanentUpstream(context.Background(), wgIFace, []string{"8.8.8.8"}, dnsConfig, nil)
 	err = dnsServer.Initialize()
 	if err != nil {
 		t.Errorf("failed to initialize DNS server: %v", err)

client/internal/dns/upstream.go

@@ -118,7 +118,7 @@ func (u *upstreamResolver) getClientPrivate() *dns.Client {
 }
 
 func (u *upstreamResolver) stop() {
-	log.Debugf("stoping serving DNS for upstreams %s", u.upstreamServers)
+	log.Debugf("stopping serving DNS for upstreams %s", u.upstreamServers)
 	u.cancel()
 }
 

client/internal/engine.go

@@ -195,12 +195,13 @@ func (e *Engine) Start() error {
 	var routes []*route.Route
 
 	if runtime.GOOS == "android" {
-		routes, err = e.readInitialSettings()
+		var dnsConfig *nbdns.Config
+		routes, dnsConfig, err = e.readInitialSettings()
 		if err != nil {
 			return err
 		}
 		if e.dnsServer == nil {
-			e.dnsServer = dns.NewDefaultServerPermanentUpstream(e.ctx, e.wgInterface, e.mobileDep.HostDNSAddresses)
+			e.dnsServer = dns.NewDefaultServerPermanentUpstream(e.ctx, e.wgInterface, e.mobileDep.HostDNSAddresses, *dnsConfig, e.mobileDep.NetworkChangeListener)
 			go e.mobileDep.DnsReadyListener.OnReady()
 		}
 	} else {
@@ -214,17 +215,16 @@ func (e *Engine) Start() error {
 		}
 	}
 
-	log.Debugf("Initial routes contain %d routes", len(routes))
 	e.routeManager = routemanager.NewManager(e.ctx, e.config.WgPrivateKey.PublicKey().String(), e.wgInterface, e.statusRecorder, routes)
-	e.mobileDep.RouteListener.SetInterfaceIP(wgAddr)
-
-	e.routeManager.SetRouteChangeListener(e.mobileDep.RouteListener)
+	e.mobileDep.NetworkChangeListener.SetInterfaceIP(wgAddr)
+	e.routeManager.SetRouteChangeListener(e.mobileDep.NetworkChangeListener)
 
 	switch runtime.GOOS {
 	case "android":
 		err = e.wgInterface.CreateOnAndroid(iface.MobileIFaceArguments{
-			Routes: e.routeManager.InitialRouteRange(),
-			Dns:    e.dnsServer.DnsIP(),
+			Routes:        e.routeManager.InitialRouteRange(),
+			Dns:           e.dnsServer.DnsIP(),
+			SearchDomains: e.dnsServer.SearchDomains(),
 		})
 	case "ios":
 		err = e.wgInterface.CreateOniOS(e.mobileDep.FileDescriptor)
@@ -724,8 +724,9 @@ func toDNSConfig(protoDNSConfig *mgmProto.DNSConfig) nbdns.Config {
 
 	for _, nsGroup := range protoDNSConfig.GetNameServerGroups() {
 		dnsNSGroup := &nbdns.NameServerGroup{
-			Primary: nsGroup.GetPrimary(),
-			Domains: nsGroup.GetDomains(),
+			Primary:              nsGroup.GetPrimary(),
+			Domains:              nsGroup.GetDomains(),
+			SearchDomainsEnabled: nsGroup.GetSearchDomainsEnabled(),
 		}
 		for _, ns := range nsGroup.GetNameServers() {
 			dnsNS := nbdns.NameServer{
@@ -1060,13 +1061,14 @@ func (e *Engine) close() {
 	}
 }
 
-func (e *Engine) readInitialSettings() ([]*route.Route, error) {
+func (e *Engine) readInitialSettings() ([]*route.Route, *nbdns.Config, error) {
 	netMap, err := e.mgmClient.GetNetworkMap()
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	routes := toRoutes(netMap.GetRoutes())
-	return routes, nil
+	dnsCfg := toDNSConfig(netMap.GetDNSConfig())
+	return routes, &dnsCfg, nil
 }
 
 func findIPFromInterfaceName(ifaceName string) (net.IP, error) {

client/internal/engine_test.go

@@ -1039,10 +1039,11 @@ func startManagement(dataDir string) (*grpc.Server, string, error) {
 		return nil, "", err
 	}
 	s := grpc.NewServer(grpc.KeepaliveEnforcementPolicy(kaep), grpc.KeepaliveParams(kasp))
-	store, err := server.NewFileStore(config.Datadir, nil)
+	store, err := server.NewStoreFromJson(config.Datadir, nil)
 	if err != nil {
-		log.Fatalf("failed creating a store: %s: %v", config.Datadir, err)
+		return nil, "", err
 	}
+
 	peersUpdateManager := server.NewPeersUpdateManager()
 	eventStore := &activity.InMemoryEventStore{}
 	if err != nil {

client/internal/listener/network_change.go

@@ -0,0 +1,7 @@
+package listener
+
+// NetworkChangeListener is a callback interface for mobile system
+type NetworkChangeListener interface {
+	// OnNetworkChanged invoke when network settings has been changed
+	OnNetworkChanged()
+}

client/internal/mobile_dependency.go

@@ -2,19 +2,19 @@ package internal
 
 import (
 	"github.com/netbirdio/netbird/client/internal/dns"
-	"github.com/netbirdio/netbird/client/internal/routemanager"
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
 	"github.com/netbirdio/netbird/iface"
 )
 
 // MobileDependency collect all dependencies for mobile platform
 type MobileDependency struct {
-	TunAdapter       iface.TunAdapter
-	IFaceDiscover    stdnet.ExternalIFaceDiscover
-	RouteListener    routemanager.RouteListener
-	HostDNSAddresses []string
-	DnsReadyListener dns.ReadyListener
-	DnsManager       dns.IosDnsManager
-	FileDescriptor   int32
-	InterfaceName    string
+	TunAdapter            iface.TunAdapter
+	IFaceDiscover         stdnet.ExternalIFaceDiscover
+	NetworkChangeListener listener.NetworkChangeListener
+	HostDNSAddresses      []string
+	DnsReadyListener      dns.ReadyListener
+	DnsManager            dns.IosDnsManager
+	FileDescriptor        int32
+	InterfaceName         string
 }

client/internal/routemanager/client.go

@@ -119,7 +119,7 @@ func (c *clientNetwork) getBestRouteFromStatuses(routePeerStatuses map[string]ro
 		log.Warnf("the network %s has not been assigned a routing peer as no peers from the list %s are currently connected", c.network, peers)
 
 	} else if chosen != currID {
-		log.Infof("new chosen route is %s with peer %s with score %d", chosen, c.routes[chosen].Peer, chosenScore)
+		log.Infof("new chosen route is %s with peer %s with score %d for network %s", chosen, c.routes[chosen].Peer, chosenScore, c.network)
 	}
 
 	return chosen

client/internal/routemanager/manager.go

@@ -7,6 +7,7 @@ import (
 
 	log "github.com/sirupsen/logrus"
 
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/client/internal/peer"
 	"github.com/netbirdio/netbird/iface"
 	"github.com/netbirdio/netbird/route"
@@ -16,7 +17,7 @@ import (
 // Manager is a route manager interface
 type Manager interface {
 	UpdateRoutes(updateSerial uint64, newRoutes []*route.Route) error
-	SetRouteChangeListener(listener RouteListener)
+	SetRouteChangeListener(listener listener.NetworkChangeListener)
 	InitialRouteRange() []string
 	Stop()
 }
@@ -96,7 +97,7 @@ func (m *DefaultManager) UpdateRoutes(updateSerial uint64, newRoutes []*route.Ro
 }
 
 // SetRouteChangeListener set RouteListener for route change notifier
-func (m *DefaultManager) SetRouteChangeListener(listener RouteListener) {
+func (m *DefaultManager) SetRouteChangeListener(listener listener.NetworkChangeListener) {
 	m.notifier.setListener(listener)
 }
 
@@ -155,7 +156,7 @@ func (m *DefaultManager) classifiesRoutes(newRoutes []*route.Route) (map[string]
 			// if prefix is too small, lets assume is a possible default route which is not yet supported
 			// we skip this route management
 			if newRoute.Network.Bits() < 7 {
-				log.Errorf("this agent version: %s, doesn't support default routes, received %s, skiping this route",
+				log.Errorf("this agent version: %s, doesn't support default routes, received %s, skipping this route",
 					version.NetbirdVersion(), newRoute.Network)
 				continue
 			}

client/internal/routemanager/mock.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/netbirdio/netbird/client/internal/listener"
 	"github.com/netbirdio/netbird/iface"
 	"github.com/netbirdio/netbird/route"
 )
@@ -32,7 +33,7 @@ func (m *MockManager) Start(ctx context.Context, iface *iface.WGIface) {
 }
 
 // SetRouteChangeListener mock implementation of SetRouteChangeListener from Manager interface
-func (m *MockManager) SetRouteChangeListener(listener RouteListener) {
+func (m *MockManager) SetRouteChangeListener(listener listener.NetworkChangeListener) {
 
 }
 

client/internal/routemanager/nftables_linux.go

@@ -135,7 +135,8 @@ func (n *nftablesManager) RestoreOrCreateContainers() error {
 	}
 
 	for _, table := range tables {
-		if table.Name == "filter" {
+		if table.Name == "filter" && table.Family == nftables.TableFamilyIPv4 {
+			log.Debugf("nftables: found filter table for ipv4")
 			n.filterTable = table
 			continue
 		}
@@ -486,7 +487,7 @@ func (n *nftablesManager) RemoveRoutingRules(pair routerPair) error {
 	if len(n.rules) == 2 && n.defaultForwardRules[0] != nil {
 		err := n.eraseDefaultForwardRule()
 		if err != nil {
-			log.Errorf("failed to delte default fwd rule: %s", err)
+			log.Errorf("failed to delete default fwd rule: %s", err)
 		}
 	}
 

client/internal/routemanager/notifier.go

@@ -2,37 +2,34 @@ package routemanager
 
 import (
 	"sort"
-	"strings"
 	"sync"
 
-	log "github.com/sirupsen/logrus"
-
 	"github.com/netbirdio/netbird/route"
 )
 
 // RouteListener is a callback interface for mobile system
-type RouteListener interface {
-	// OnNewRouteSetting invoke when new route setting has been arrived
-	OnNewRouteSetting(string)
-	SetInterfaceIP(string)
-}
+// type RouteListener interface {
+// 	// OnNewRouteSetting invoke when new route setting has been arrived
+// 	OnNewRouteSetting(string)
+// 	SetInterfaceIP(string)
+// }
 
 type notifier struct {
 	initialRouteRangers []string
 	routeRangers        []string
 
-	routeListener    RouteListener
-	routeListenerMux sync.Mutex
+	listener    listener.NetworkChangeListener
+	listenerMux sync.Mutex
 }
 
 func newNotifier() *notifier {
 	return &notifier{}
 }
 
-func (n *notifier) setListener(listener RouteListener) {
-	n.routeListenerMux.Lock()
-	defer n.routeListenerMux.Unlock()
-	n.routeListener = listener
+func (n *notifier) setListener(listener listener.NetworkChangeListener) {
+	n.listenerMux.Lock()
+	defer n.listenerMux.Unlock()
+	n.listener = listener
 }
 
 func (n *notifier) setInitialClientRoutes(clientRoutes []*route.Route) {
@@ -63,16 +60,16 @@ func (n *notifier) onNewRoutes(idMap map[string][]*route.Route) {
 }
 
 func (n *notifier) notify() {
-	n.routeListenerMux.Lock()
-	defer n.routeListenerMux.Unlock()
-	if n.routeListener == nil {
+	n.listenerMux.Lock()
+	defer n.listenerMux.Unlock()
+	if n.listener == nil {
 		return
 	}
 
-	go func(l RouteListener) {
+	go func(l listener.NetworkChangeListener) {
 		log.Debugf("notifying route listener with route ranges: %s", strings.Join(n.routeRangers, ","))
-		l.OnNewRouteSetting(strings.Join(n.routeRangers, ","))
-	}(n.routeListener)
+		l.OnNetworkChanged(strings.Join(n.routeRangers, ","))
+	}(n.listener)
 }
 
 func (n *notifier) hasDiff(a []string, b []string) bool {

client/ui/build-ui-linux.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+sudo apt update
+sudo apt remove gir1.2-appindicator3-0.1
+sudo apt install -y libayatana-appindicator3-dev
+go build

client/ui/client_ui.go

@@ -15,8 +15,10 @@ import (
 	"runtime"
 	"strconv"
 	"strings"
+	"sync"
 	"syscall"
 	"time"
+	"unicode"
 
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/app"
@@ -74,18 +76,30 @@ func main() {
 	}
 }
 
-//go:embed connected.ico
+//go:embed netbird-systemtray-connected.ico
 var iconConnectedICO []byte
 
-//go:embed connected.png
+//go:embed netbird-systemtray-connected.png
 var iconConnectedPNG []byte
 
-//go:embed disconnected.ico
+//go:embed netbird-systemtray-default.ico
 var iconDisconnectedICO []byte
 
-//go:embed disconnected.png
+//go:embed netbird-systemtray-default.png
 var iconDisconnectedPNG []byte
 
+//go:embed netbird-systemtray-update.ico
+var iconUpdateICO []byte
+
+//go:embed netbird-systemtray-update.png
+var iconUpdatePNG []byte
+
+//go:embed netbird-systemtray-update-cloud.ico
+var iconUpdateCloudICO []byte
+
+//go:embed netbird-systemtray-update-cloud.png
+var iconUpdateCloudPNG []byte
+
 type serviceClient struct {
 	ctx  context.Context
 	addr string
@@ -93,14 +107,20 @@ type serviceClient struct {
 
 	icConnected    []byte
 	icDisconnected []byte
+	icUpdate       []byte
+	icUpdateCloud  []byte
 
 	// systray menu items
-	mStatus     *systray.MenuItem
-	mUp         *systray.MenuItem
-	mDown       *systray.MenuItem
-	mAdminPanel *systray.MenuItem
-	mSettings   *systray.MenuItem
-	mQuit       *systray.MenuItem
+	mStatus        *systray.MenuItem
+	mUp            *systray.MenuItem
+	mDown          *systray.MenuItem
+	mAdminPanel    *systray.MenuItem
+	mSettings      *systray.MenuItem
+	mAbout         *systray.MenuItem
+	mVersionUI     *systray.MenuItem
+	mVersionDaemon *systray.MenuItem
+	mUpdate        *systray.MenuItem
+	mQuit          *systray.MenuItem
 
 	// application with main windows.
 	app          fyne.App
@@ -118,6 +138,11 @@ type serviceClient struct {
 	managementURL string
 	preSharedKey  string
 	adminURL      string
+
+	update               *version.Update
+	daemonVersion        string
+	updateIndicationLock sync.Mutex
+	isUpdateIconActive   bool
 }
 
 // newServiceClient instance constructor
@@ -130,14 +155,20 @@ func newServiceClient(addr string, a fyne.App, showSettings bool) *serviceClient
 		app:  a,
 
 		showSettings: showSettings,
+		update:       version.NewUpdate(),
 	}
 
 	if runtime.GOOS == "windows" {
 		s.icConnected = iconConnectedICO
 		s.icDisconnected = iconDisconnectedICO
+		s.icUpdate = iconUpdateICO
+		s.icUpdateCloud = iconUpdateCloudICO
+
 	} else {
 		s.icConnected = iconConnectedPNG
 		s.icDisconnected = iconDisconnectedPNG
+		s.icUpdate = iconUpdatePNG
+		s.icUpdateCloud = iconUpdateCloudPNG
 	}
 
 	if showSettings {
@@ -202,9 +233,10 @@ func (s *serviceClient) getSettingsForm() *widget.Form {
 				}
 
 				_, err = client.Login(s.ctx, &proto.LoginRequest{
-					ManagementUrl: s.iMngURL.Text,
-					AdminURL:      s.iAdminURL.Text,
-					PreSharedKey:  s.iPreSharedKey.Text,
+					ManagementUrl:        s.iMngURL.Text,
+					AdminURL:             s.iAdminURL.Text,
+					PreSharedKey:         s.iPreSharedKey.Text,
+					IsLinuxDesktopClient: runtime.GOOS == "linux",
 				})
 				if err != nil {
 					log.Errorf("login to management URL: %v", err)
@@ -233,7 +265,9 @@ func (s *serviceClient) login() error {
 		return err
 	}
 
-	loginResp, err := conn.Login(s.ctx, &proto.LoginRequest{})
+	loginResp, err := conn.Login(s.ctx, &proto.LoginRequest{
+		IsLinuxDesktopClient: runtime.GOOS == "linux",
+	})
 	if err != nil {
 		log.Errorf("login to management URL with: %v", err)
 		return err
@@ -325,19 +359,53 @@ func (s *serviceClient) updateStatus() error {
 			return err
 		}
 
+		s.updateIndicationLock.Lock()
+		defer s.updateIndicationLock.Unlock()
+
+		var systrayIconState bool
 		if status.Status == string(internal.StatusConnected) && !s.mUp.Disabled() {
-			systray.SetIcon(s.icConnected)
+			if !s.isUpdateIconActive {
+				systray.SetIcon(s.icConnected)
+			}
 			systray.SetTooltip("NetBird (Connected)")
 			s.mStatus.SetTitle("Connected")
 			s.mUp.Disable()
 			s.mDown.Enable()
+			systrayIconState = true
 		} else if status.Status != string(internal.StatusConnected) && s.mUp.Disabled() {
-			systray.SetIcon(s.icDisconnected)
+			if !s.isUpdateIconActive {
+				systray.SetIcon(s.icDisconnected)
+			}
 			systray.SetTooltip("NetBird (Disconnected)")
 			s.mStatus.SetTitle("Disconnected")
 			s.mDown.Disable()
 			s.mUp.Enable()
+			systrayIconState = false
 		}
+
+		// the updater struct notify by the upgrades available only, but if meanwhile the daemon has successfully
+		// updated must reset the mUpdate visibility state
+		if s.daemonVersion != status.DaemonVersion {
+			s.mUpdate.Hide()
+			s.daemonVersion = status.DaemonVersion
+
+			s.isUpdateIconActive = s.update.SetDaemonVersion(status.DaemonVersion)
+			if !s.isUpdateIconActive {
+				if systrayIconState {
+					systray.SetIcon(s.icConnected)
+					s.mAbout.SetIcon(s.icConnected)
+				} else {
+					systray.SetIcon(s.icDisconnected)
+					s.mAbout.SetIcon(s.icDisconnected)
+				}
+			}
+
+			daemonVersionTitle := normalizedVersion(s.daemonVersion)
+			s.mVersionDaemon.SetTitle(fmt.Sprintf("Daemon: %s", daemonVersionTitle))
+			s.mVersionDaemon.SetTooltip(fmt.Sprintf("Daemon version: %s", daemonVersionTitle))
+			s.mVersionDaemon.Show()
+		}
+
 		return nil
 	}, &backoff.ExponentialBackOff{
 		InitialInterval:     time.Second,
@@ -371,11 +439,24 @@ func (s *serviceClient) onTrayReady() {
 	systray.AddSeparator()
 	s.mSettings = systray.AddMenuItem("Settings", "Settings of the application")
 	systray.AddSeparator()
-	v := systray.AddMenuItem("v"+version.NetbirdVersion(), "Client Version: "+version.NetbirdVersion())
-	v.Disable()
+
+	s.mAbout = systray.AddMenuItem("About", "About")
+	s.mAbout.SetIcon(s.icDisconnected)
+	versionString := normalizedVersion(version.NetbirdVersion())
+	s.mVersionUI = s.mAbout.AddSubMenuItem(fmt.Sprintf("GUI: %s", versionString), fmt.Sprintf("GUI Version: %s", versionString))
+	s.mVersionUI.Disable()
+
+	s.mVersionDaemon = s.mAbout.AddSubMenuItem("", "")
+	s.mVersionDaemon.Disable()
+	s.mVersionDaemon.Hide()
+
+	s.mUpdate = s.mAbout.AddSubMenuItem("Download latest version", "Download latest version")
+	s.mUpdate.Hide()
+
 	systray.AddSeparator()
 	s.mQuit = systray.AddMenuItem("Quit", "Quit the client app")
 
+	s.update.SetOnUpdateListener(s.onUpdateAvailable)
 	go func() {
 		s.getSrvConfig()
 		for {
@@ -433,6 +514,11 @@ func (s *serviceClient) onTrayReady() {
 			case <-s.mQuit.ClickedCh:
 				systray.Quit()
 				return
+			case <-s.mUpdate.ClickedCh:
+				err := openURL(version.DownloadUrl())
+				if err != nil {
+					log.Errorf("%s", err)
+				}
 			}
 			if err != nil {
 				log.Errorf("process connection: %v", err)
@@ -441,6 +527,14 @@ func (s *serviceClient) onTrayReady() {
 	}()
 }
 
+func normalizedVersion(version string) string {
+	versionString := version
+	if unicode.IsDigit(rune(versionString[0])) {
+		versionString = fmt.Sprintf("v%s", versionString)
+	}
+	return versionString
+}
+
 func (s *serviceClient) onTrayExit() {}
 
 // getSrvClient connection to the service.
@@ -501,6 +595,32 @@ func (s *serviceClient) getSrvConfig() {
 	}
 }
 
+func (s *serviceClient) onUpdateAvailable() {
+	s.updateIndicationLock.Lock()
+	defer s.updateIndicationLock.Unlock()
+
+	s.mUpdate.Show()
+	s.mAbout.SetIcon(s.icUpdateCloud)
+
+	s.isUpdateIconActive = true
+	systray.SetIcon(s.icUpdate)
+}
+
+func openURL(url string) error {
+	var err error
+	switch runtime.GOOS {
+	case "windows":
+		err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
+	case "darwin":
+		err = exec.Command("open", url).Start()
+	case "linux":
+		err = exec.Command("xdg-open", url).Start()
+	default:
+		err = fmt.Errorf("unsupported platform")
+	}
+	return err
+}
+
 // checkPIDFile exists and return error, or write new.
 func checkPIDFile() error {
 	pidFile := path.Join(os.TempDir(), "wiretrustee-ui.pid")