Merge branch 'master' into 4927-refactor-tls

Pull request: 4927-imp-ui
Updates #4927. Squashed commit of the following: commit 510143325805133e379ebc207cdc6bff59c94ade Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Tue Nov 22 15:00:13 2022 +0300 home: imp err commit fd65a9914494b6dccdee7c0f0aa08bce80ce0945 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Mon Nov 21 18:53:39 2022 +0300 client: imp validation ui
2022-11-22 17:10:40 +03:00 · 2022-11-22 17:07:49 +03:00 · 2022-11-21 19:45:18 +03:00 · 2022-11-21 19:05:49 +03:00 · 2022-11-15 17:44:50 +03:00 · 2022-11-09 14:37:07 +03:00
37 changed files with 859 additions and 645 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,12 +18,34 @@ and this project adheres to


 <!--
-## [v0.107.18] - 2022-11-16 (APPROX.)
+## [v0.107.19] - 2022-11-23 (APPROX.)
+
+See also the [v0.107.19 GitHub milestone][ms-v0.107.19].
+
+[ms-v0.107.19]: https://github.com/AdguardTeam/AdGuardHome/milestone/55?closed=1
+-->
+
+### Added
+
+- The new `--update` command-line option, which allows updating AdGuard Home
+  silently ([#4223]).
+
+[#4223]: https://github.com/AdguardTeam/AdGuardHome/issues/4223
+
+
+
+## [v0.107.18] - 2022-11-08

 See also the [v0.107.18 GitHub milestone][ms-v0.107.18].

-[ms-v0.107.18]: https://github.com/AdguardTeam/AdGuardHome/milestone/52?closed=1
-->
+### Fixed
+
+- Crash on some systems when domains from system hosts files are processed
+  ([#5089]).
+
+[#5089]: https://github.com/AdguardTeam/AdGuardHome/issues/5089
+
+[ms-v0.107.18]: https://github.com/AdguardTeam/AdGuardHome/milestone/54?closed=1



@@ -830,7 +852,7 @@ See also the [v0.107.0 GitHub milestone][ms-v0.107.0].
 - Query log search now supports internationalized domains ([#3012]).
 - Internationalized domains are now shown decoded in the query log with the
  original encoded version shown in request details ([#3013]).
- When /etc/hosts-type rules have several IPs for one host, all IPs are now
+- When `/etc/hosts`-type rules have several IPs for one host, all IPs are now
  returned instead of only the first one ([#1381]).
 - Property `rlimit_nofile` is now in the `os` object of the configuration
  file, together with the new `group` and `user` properties ([#2763]).
@@ -1088,7 +1110,7 @@ See also the [v0.106.0 GitHub milestone][ms-v0.106.0].
 - Hostname uniqueness validation in the DHCP server ([#2952]).
 - Hostname generating for DHCP clients which don't provide their own ([#2723]).
 - New flag `--no-etc-hosts` to disable client domain name lookups in the
-  operating system's /etc/hosts files ([#1947]).
+  operating system's `/etc/hosts` files ([#1947]).
 - The ability to set up custom upstreams to resolve PTR queries for local
  addresses and to disable the automatic resolving of clients' addresses
  ([#2704]).
@@ -1405,11 +1427,12 @@ See also the [v0.104.2 GitHub milestone][ms-v0.104.2].


 <!--
-[Unreleased]: https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.18...HEAD
-[v0.107.18]:  https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.17...v0.107.18
+[Unreleased]: https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.19...HEAD
+[v0.107.19]:  https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.18...v0.107.19
 -->

-[Unreleased]: https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.17...HEAD
+[Unreleased]: https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.18...HEAD
+[v0.107.18]:  https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.17...v0.107.18
 [v0.107.17]:  https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.16...v0.107.17
 [v0.107.16]:  https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.15...v0.107.16
 [v0.107.15]:  https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.14...v0.107.15
--- a/client/src/__locales/en.json
+++ b/client/src/__locales/en.json
@@ -393,6 +393,7 @@
    "encryption_issuer": "Issuer",
    "encryption_hostnames": "Hostnames",
    "encryption_reset": "Are you sure you want to reset encryption settings?",
+    "encryption_warning": "Warning",
    "topline_expiring_certificate": "Your SSL certificate is about to expire. Update <0>Encryption settings</0>.",
    "topline_expired_certificate": "Your SSL certificate is expired. Update <0>Encryption settings</0>.",
    "form_error_port_range": "Enter port number in the range of 80-65535",
--- a/client/src/components/Settings/Encryption/Form.js
+++ b/client/src/components/Settings/Encryption/Form.js
@@ -56,6 +56,26 @@ const clearFields = (change, setTlsConfig, t) => {
    }
 };

+const validationMessage = (warningValidation, isWarning) => {
+    if (!warningValidation) {
+        return null;
+    }
+
+    if (isWarning) {
+        return (
+            <div className="col-12">
+                <p><Trans>encryption_warning</Trans>: {warningValidation}</p>
+            </div>
+        );
+    }
+
+    return (
+        <div className="col-12">
+            <p className="text-danger">{warningValidation}</p>
+        </div>
+    );
+};
+
 let Form = (props) => {
    const {
        t,
@@ -95,6 +115,8 @@ let Form = (props) => {
        || !valid_cert
        || !valid_pair;

+    const isWarning = valid_key && valid_cert && valid_pair;
+
    return (
        <form onSubmit={handleSubmit}>
            <div className="row">
@@ -382,11 +404,7 @@ let Form = (props) => {
                        )}
                    </div>
                </div>
-                {warning_validation && (
-                    <div className="col-12">
-                        <p className="text-danger">{warning_validation}</p>
-                    </div>
-                )}
+                {validationMessage(warning_validation, isWarning)}
            </div>

            <div className="btn-list mt-2">
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.18

 require (
 	github.com/AdguardTeam/dnsproxy v0.46.2
-	github.com/AdguardTeam/golibs v0.11.2
+	github.com/AdguardTeam/golibs v0.11.3
 	github.com/AdguardTeam/urlfilter v0.16.0
 	github.com/NYTimes/gziphandler v1.1.1
 	github.com/ameshkov/dnscrypt/v2 v2.2.5
@@ -29,9 +29,9 @@ require (
 	github.com/ti-mo/netfilter v0.4.0
 	go.etcd.io/bbolt v1.3.6
 	golang.org/x/crypto v0.1.0
-	golang.org/x/exp v0.0.0-20221026153819-32f3d567a233
+	golang.org/x/exp v0.0.0-20221106115401-f9659909a136
 	golang.org/x/net v0.1.0
-	golang.org/x/sys v0.1.0
+	golang.org/x/sys v0.2.0
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 	gopkg.in/yaml.v3 v3.0.1
 	howett.net/plist v1.0.0
@@ -55,8 +55,8 @@ require (
 	github.com/mdlayher/socket v0.2.3 // indirect
 	github.com/nxadm/tail v1.4.8 // indirect
 	github.com/onsi/ginkgo v1.16.5 // indirect
-	github.com/onsi/ginkgo/v2 v2.4.0 // indirect
-	github.com/onsi/gomega v1.22.1 // indirect
+	github.com/onsi/ginkgo/v2 v2.5.0 // indirect
+	github.com/onsi/gomega v1.24.0 // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
--- a/go.sum
+++ b/go.sum
@@ -2,8 +2,8 @@ github.com/AdguardTeam/dnsproxy v0.46.2 h1:ZUKM713Ts5meYQqk6cJkUBMCFSWqFPXTgjXkN
 github.com/AdguardTeam/dnsproxy v0.46.2/go.mod h1:PAmRzFqls0E92XTglyY2ESAqMAzZJhHKErG1ZpRnpjA=
 github.com/AdguardTeam/golibs v0.4.0/go.mod h1:skKsDKIBB7kkFflLJBpfGX+G8QFTx0WKUzB6TIgtUj4=
 github.com/AdguardTeam/golibs v0.10.4/go.mod h1:rSfQRGHIdgfxriDDNgNJ7HmE5zRoURq8R+VdR81Zuzw=
-github.com/AdguardTeam/golibs v0.11.2 h1:JbQB1Dg2JWStXgHh1QqBbOLWnP4t9oDjppoBH6TVXSE=
-github.com/AdguardTeam/golibs v0.11.2/go.mod h1:87bN2x4VsTritptE3XZg9l8T6gznWsIxHBcQ1DeRIXA=
+github.com/AdguardTeam/golibs v0.11.3 h1:Oif+REq2WLycQ2Xm3ZPmJdfftptss0HbGWbxdFaC310=
+github.com/AdguardTeam/golibs v0.11.3/go.mod h1:87bN2x4VsTritptE3XZg9l8T6gznWsIxHBcQ1DeRIXA=
 github.com/AdguardTeam/gomitmproxy v0.2.0/go.mod h1:Qdv0Mktnzer5zpdpi5rAwixNJzW2FN91LjKJCkVbYGU=
 github.com/AdguardTeam/urlfilter v0.16.0 h1:IO29m+ZyQuuOnPLTzHuXj35V1DZOp1Dcryl576P2syg=
 github.com/AdguardTeam/urlfilter v0.16.0/go.mod h1:46YZDOV1+qtdRDuhZKVPSSp7JWWes0KayqHrKAFBdEI=
@@ -131,12 +131,12 @@ github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+W
 github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108oapk=
 github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
 github.com/onsi/ginkgo v1.16.5/go.mod h1:+E8gABHa3K6zRBolWtd+ROzc/U5bkGt0FwiG042wbpU=
-github.com/onsi/ginkgo/v2 v2.4.0 h1:+Ig9nvqgS5OBSACXNk15PLdp0U9XPYROt9CFzVdFGIs=
-github.com/onsi/ginkgo/v2 v2.4.0/go.mod h1:iHkDK1fKGcBoEHT5W7YBq4RFWaQulw+caOMkAt4OrFo=
+github.com/onsi/ginkgo/v2 v2.5.0 h1:TRtrvv2vdQqzkwrQ1ke6vtXf7IK34RBUJafIy1wMwls=
+github.com/onsi/ginkgo/v2 v2.5.0/go.mod h1:Luc4sArBICYCS8THh8v3i3i5CuSZO+RaQRaJoeNwomw=
 github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY=
 github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
-github.com/onsi/gomega v1.22.1 h1:pY8O4lBfsHKZHM/6nrxkhVPUznOlIu3quZcKP/M20KI=
-github.com/onsi/gomega v1.22.1/go.mod h1:x6n7VNe4hw0vkyYUM4mjIXx3JbLiPaBPNgB7PRQ1tuM=
+github.com/onsi/gomega v1.24.0 h1:+0glovB9Jd6z3VR+ScSwQqXVTIfJcGA9UBM8yzQxhqg=
+github.com/onsi/gomega v1.24.0/go.mod h1:Z/NWtiqwBrwUt4/2loMmHL63EDLnYHmVbuBpDr2vQAg=
 github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaRUnok+kx1WdO15EQc=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -177,8 +177,8 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.1.0 h1:MDRAIl0xIo9Io2xV565hzXHw3zVseKrJKodhohM5CjU=
 golang.org/x/crypto v0.1.0/go.mod h1:RecgLatLF4+eUMCP1PoPZQb+cVrJcOPbHkTkbkB9sbw=
-golang.org/x/exp v0.0.0-20221026153819-32f3d567a233 h1:9bNbSKT4RPLEzne0Xh1v3NaNecsa1DKjkOuTbY6V9rI=
-golang.org/x/exp v0.0.0-20221026153819-32f3d567a233/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
+golang.org/x/exp v0.0.0-20221106115401-f9659909a136 h1:Fq7F/w7MAa1KJ5bt2aJ62ihqp9HDcRuyILskkpIAurw=
+golang.org/x/exp v0.0.0-20221106115401-f9659909a136/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
@@ -254,8 +254,8 @@ golang.org/x/sys v0.0.0-20220209214540-3681064d5158/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
-golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
--- a/internal/aghnet/hostscontainer.go
+++ b/internal/aghnet/hostscontainer.go
@@ -139,6 +139,8 @@ type HostsRecord struct {
 func (rec *HostsRecord) equal(other *HostsRecord) (ok bool) {
 	if rec == nil {
 		return other == nil
+	} else if other == nil {
+		return false
 	}

 	return rec.Canonical == other.Canonical && rec.Aliases.Equal(other.Aliases)
@@ -478,7 +480,11 @@ func (hc *HostsContainer) refresh() (err error) {
 		return fmt.Errorf("refreshing : %w", err)
 	}

-	if maps.EqualFunc(hp.table, hc.last, (*HostsRecord).equal) {
+	// hc.last is nil on the first refresh, so let that one through.
+	//
+	// TODO(a.garipov): Once https://github.com/golang/go/issues/56621 is
+	// resolved, remove the first condition.
+	if hc.last != nil && maps.EqualFunc(hp.table, hc.last, (*HostsRecord).equal) {
 		log.Debug("%s: no changes detected", hostsContainerPref)

 		return nil
--- a/internal/aghnet/net.go
+++ b/internal/aghnet/net.go
@@ -31,12 +31,6 @@ var (
 // the IP being static is available.
 const ErrNoStaticIPInfo errors.Error = "no information about static ip"

-// IPv4Localhost returns 127.0.0.1, which returns true for [netip.Addr.Is4].
-func IPv4Localhost() (ip netip.Addr) { return netip.AddrFrom4([4]byte{127, 0, 0, 1}) }
-
-// IPv6Localhost returns ::1, which returns true for [netip.Addr.Is6].
-func IPv6Localhost() (ip netip.Addr) { return netip.AddrFrom16([16]byte{15: 1}) }
-
 // IfaceHasStaticIP checks if interface is configured to have static IP address.
 // If it can't give a definitive answer, it returns false and an error for which
 // errors.Is(err, ErrNoStaticIPInfo) is true.
--- a/internal/aghnet/net_test.go
+++ b/internal/aghnet/net_test.go
@@ -188,7 +188,7 @@ func TestBroadcastFromIPNet(t *testing.T) {
 }

 func TestCheckPort(t *testing.T) {
-	laddr := netip.AddrPortFrom(IPv4Localhost(), 0)
+	laddr := netip.AddrPortFrom(netutil.IPv4Localhost(), 0)

 	t.Run("tcp_bound", func(t *testing.T) {
 		l, err := net.Listen("tcp", laddr.String())
--- a/internal/dnsforward/clientid.go
+++ b/internal/dnsforward/clientid.go
@@ -23,16 +23,6 @@ func ValidateClientID(id string) (err error) {
 	return nil
 }

-// hasLabelSuffix returns true if s ends with suffix preceded by a dot.  It's
-// a helper function to prevent unnecessary allocations in code like:
-//
-// if strings.HasSuffix(s, "." + suffix) { /* … */ }
-//
-// s must be longer than suffix.
-func hasLabelSuffix(s, suffix string) (ok bool) {
-	return strings.HasSuffix(s, suffix) && s[len(s)-len(suffix)-1] == '.'
-}
-
 // clientIDFromClientServerName extracts and validates a ClientID.  hostSrvName
 // is the server name of the host.  cliSrvName is the server name as sent by the
 // client.  When strict is true, and client and host server name don't match,
@@ -46,7 +36,7 @@ func clientIDFromClientServerName(
 		return "", nil
 	}

-	if !hasLabelSuffix(cliSrvName, hostSrvName) {
+	if !netutil.IsImmediateSubdomain(cliSrvName, hostSrvName) {
 		if !strict {
 			return "", nil
 		}
--- a/internal/dnsforward/config.go
+++ b/internal/dnsforward/config.go
@@ -145,7 +145,8 @@ type FilteringConfig struct {
 	IpsetListFileName string `yaml:"ipset_file"`
 }

-// TLSConfig is the TLS configuration for HTTPS, DNS-over-HTTPS, and DNS-over-TLS
+// TLSConfig is the TLS configuration for HTTPS, DNS-over-HTTPS, DNS-over-TLS,
+// and DNS-over-QUIC.
 type TLSConfig struct {
 	cert tls.Certificate

--- a/internal/dnsforward/dnsforward.go
+++ b/internal/dnsforward/dnsforward.go
@@ -246,6 +246,7 @@ type RDNSExchanger interface {
 	// Exchange tries to resolve the ip in a suitable way, e.g. either as
 	// local or as external.
 	Exchange(ip net.IP) (host string, err error)
+
 	// ResolvesPrivatePTR returns true if the RDNSExchanger is able to
 	// resolve PTR requests for locally-served addresses.
 	ResolvesPrivatePTR() (ok bool)
@@ -261,6 +262,9 @@ const (
 	rDNSNotPTRErr errors.Error = "the response is not a ptr"
 )

+// type check
+var _ RDNSExchanger = (*Server)(nil)
+
 // Exchange implements the RDNSExchanger interface for *Server.
 func (s *Server) Exchange(ip net.IP) (host string, err error) {
 	s.serverLock.RLock()
@@ -675,21 +679,13 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {

 // IsBlockedClient returns true if the client is blocked by the current access
 // settings.
-func (s *Server) IsBlockedClient(ip net.IP, clientID string) (blocked bool, rule string) {
+func (s *Server) IsBlockedClient(ip netip.Addr, clientID string) (blocked bool, rule string) {
 	s.serverLock.RLock()
 	defer s.serverLock.RUnlock()

 	blockedByIP := false
-	if ip != nil {
-		// TODO(a.garipov):  Remove once we switch to netip.Addr more fully.
-		ipAddr, err := netutil.IPToAddrNoMapped(ip)
-		if err != nil {
-			log.Error("dnsforward: bad client ip %v: %s", ip, err)
-
-			return false, ""
-		}
-
-		blockedByIP, rule = s.access.isBlockedIP(ipAddr)
+	if ip != (netip.Addr{}) {
+		blockedByIP, rule = s.access.isBlockedIP(ip)
 	}

 	allowlistMode := s.access.allowlistMode()
--- a/internal/dnsforward/filter.go
+++ b/internal/dnsforward/filter.go
@@ -19,13 +19,13 @@ func (s *Server) beforeRequestHandler(
 	_ *proxy.Proxy,
 	pctx *proxy.DNSContext,
 ) (reply bool, err error) {
-	ip, _ := netutil.IPAndPortFromAddr(pctx.Addr)
 	clientID, err := s.clientIDFromDNSContext(pctx)
 	if err != nil {
 		return false, fmt.Errorf("getting clientid: %w", err)
 	}

-	blocked, _ := s.IsBlockedClient(ip, clientID)
+	addrPort := netutil.NetAddrToAddrPort(pctx.Addr)
+	blocked, _ := s.IsBlockedClient(addrPort.Addr(), clientID)
 	if blocked {
 		return s.preBlockedResponse(pctx)
 	}
--- a/internal/filtering/filter_test.go
+++ b/internal/filtering/filter_test.go
@@ -11,7 +11,7 @@ import (
 	"testing"
 	"time"

-	"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
+	"github.com/AdguardTeam/golibs/netutil"
 	"github.com/AdguardTeam/golibs/testutil"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -40,7 +40,7 @@ func serveFiltersLocally(t *testing.T, fltContent []byte) (ipp netip.AddrPort) {
 	addr := l.Addr()
 	require.IsType(t, new(net.TCPAddr), addr)

-	return netip.AddrPortFrom(aghnet.IPv4Localhost(), uint16(addr.(*net.TCPAddr).Port))
+	return netip.AddrPortFrom(netutil.IPv4Localhost(), uint16(addr.(*net.TCPAddr).Port))
 }

 func TestFilters(t *testing.T) {
--- a/internal/filtering/servicelist.go
+++ b/internal/filtering/servicelist.go
@@ -34,6 +34,7 @@ var blockedServices = []blockedService{{
 		"||amazon.com.au^",
 		"||amazon.com.br^",
 		"||amazon.com.mx^",
+		"||amazon.com.tr^",
 		"||amazon.com^",
 		"||amazon.de^",
 		"||amazon.es^",
@@ -73,19 +74,29 @@ var blockedServices = []blockedService{{
 	IconSVG: []byte("<svg xmlns=\"http://www.w3.org/2000/svg\" fill=\"currentColor\" viewBox=\"0 0 50 50\"><path d=\"M38 10.813l-.906 3.78-1.907-3.405v1.718c2.899 2.301 4.926 5.79 5.126 9.688.699-.2 1.3-.188 2-.188 1.374 0 2.667.297 3.812.875l-1.031-.593 3.812-.875-3.812-.907L48.5 19h-3.813l2.813-2.688-3.688 1.094 2-3.312-3.312 2 1.094-3.688-2.688 2.781.094-3.874-2 3.28zM27 11c-5 0-9.414 2.992-11.313 7.594-.699-.399-1.687-.688-2.687-.688-3.2 0-5.906 2.606-5.906 5.907v.5c-3.899.3-7.094 3.68-7.094 7.78 0 .802.113 1.52.313 2.22.101.398.5.687 1 .687h47c.398 0 .675-.195.874-.594.5-1.101.813-2.207.813-3.406 0-4.2-3.488-7.594-7.688-7.594-.8 0-1.511.082-2.312.282l4.906 6.625-5.5-4.5L22 29.593l15.094-4.905L28.5 21.5l10.688 1.813v-.125C39.188 16.488 33.699 11 27 11zm19.781 12.656c.434.274.844.586 1.219.938h.5z\" /></svg>"),
 	Rules: []string{
 		"||1.1.1.1^",
+		"||argotunnel.com^",
 		"||cloudflare-dns.com^",
+		"||cloudflare-ipfs.com^",
+		"||cloudflare-quic.com^",
 		"||cloudflare.cn^",
 		"||cloudflare.com^",
 		"||cloudflare.net^",
+		"||cloudflareaccess.com^",
+		"||cloudflareapps.com^",
 		"||cloudflarebolt.com^",
 		"||cloudflareclient.com^",
 		"||cloudflareinsights.com^",
 		"||cloudflareresolve.com^",
 		"||cloudflarestatus.com^",
 		"||cloudflarestream.com^",
+		"||cloudflarewarp.com^",
 		"||dns4torpnlfs2ifuz2s2yf3fc7rdmsbhm6rw75euj35pac6ap25zgqad.onion^",
 		"||one.one^",
+		"||pages.dev^",
+		"||trycloudflare.com^",
+		"||videodelivery.net^",
 		"||warp.plus^",
+		"||workers.dev^",
 	},
 }, {
 	ID:      "dailymotion",
@@ -111,6 +122,7 @@ var blockedServices = []blockedService{{
 	Rules: []string{
 		"||discord.com^",
 		"||discord.gg^",
+		"||discord.gift",
 		"||discord.media^",
 		"||discordapp.com^",
 		"||discordapp.net^",
@@ -122,8 +134,20 @@ var blockedServices = []blockedService{{
 	Rules: []string{
 		"||disney-plus.net^",
 		"||disney.playback.edge.bamgrid.com^",
+		"||disneynow.com^",
 		"||disneyplus.com^",
+		"||hotstar.com^",
 		"||media.dssott.com^",
+		"||star.playback.edge.bamgrid.com^",
+		"||starplus.com^",
+	},
+}, {
+	ID:      "douban",
+	Name:    "Douban",
+	IconSVG: []byte("<svg xmlns=\"http://www.w3.org/2000/svg\" fill=\"currentColor\" viewBox=\"0 0 50 50\"><path d=\"M36.54 18.51H13.315v8.012H36.54zM8.58 14.32h32.643v16.39H8.581zM5.146 5.754h39.516v4.193H5.145zm11.051 25.652c1.73 2.416 3.28 5.336 4.647 8.748h8.263c1.637-2.632 3.076-5.552 4.31-8.748l4.75 1.631c-1.241 2.694-2.581 5.07-4.003 7.117h11.615v4.147H4.028v-4.147h12.168c-1.117-2.203-2.568-4.574-4.371-7.117z\" /></svg>"),
+	Rules: []string{
+		"||douban.com^",
+		"||doubanio.com^",
 	},
 }, {
 	ID:      "ebay",
@@ -176,11 +200,13 @@ var blockedServices = []blockedService{{
 		"||facebook.net^",
 		"||facebookcorewwwi.onion^",
 		"||fb.com^",
+		"||fb.gg^",
 		"||fb.me^",
 		"||fb.watch^",
 		"||fbcdn.com^",
 		"||fbcdn.net^",
 		"||fbsbx.com^",
+		"||fbwat.ch^",
 		"||messenger.com^",
 	},
 }, {
@@ -269,8 +295,9 @@ var blockedServices = []blockedService{{
 	Name:    "QQ",
 	IconSVG: []byte("<svg xmlns=\"http://www.w3.org/2000/svg\" fill=\"currentColor\" viewBox=\"0 0 32 32\"><g fill=\"none\" fillRule=\"evenodd\"><path d=\"M0 0h32v32H0z\" /><g fill=\"currentColor\" fillRule=\"nonzero\"><path d=\"M11.25 32C8.342 32 6 30.74 6 29.242c0-1.497 2.342-2.757 5.25-2.757s5.25 1.26 5.25 2.757S14.158 32 11.25 32zM27 29.242c0-1.497-2.342-2.757-5.25-2.757s-5.25 1.26-5.25 2.757S18.842 32 21.75 32 27 30.74 27 29.242zM14.885 7.182c0 .63-.323 1.182-.808 1.182-.485 0-.808-.552-.808-1.182 0-.63.323-1.182.808-1.182.485 0 .808.552.808 1.182zM18.923 6c-.485 0-.808.552-.808 1.182 0 .63.323-.394.808-.394.485 0 .808 1.024.808.394S19.408 6 18.923 6z\" /><path d=\"M6.653 12.638s4.685 2.465 9.926 2.465c5.242 0 9.927-2.465 9.927-2.465.112-.09.217-.161.316-.212-.002-1.088-.078-2.026-.078-2.808C26.744 4.292 22.138 0 16.5 0S6.176 4.292 6.176 9.618v2.78c.146.042.3.113.477.24zm12.626-8.664c1.112 0 1.986 1.272 1.986 2.782s-.874 2.782-1.986 2.782c-1.111 0-1.985-1.271-1.985-2.782 0-1.51.874-2.782 1.985-2.782zm-5.558 0c1.111 0 1.985 1.272 1.985 2.782s-.874 2.782-1.985 2.782c-1.112 0-1.986-1.271-1.986-2.782 0-1.51.874-2.782 1.986-2.782zm2.779 6.624c2.912 0 5.294.464 5.294.994s-2.382 1.656-5.294 1.656c-2.912 0-5.294-1.126-5.294-1.656s2.382-.994 5.294-.994zm11.374 5.182c-.058.038-.108.076-.177.117-.159.08-5.241 3.18-11.038 3.18-1.43 0-2.7-.239-3.97-.477-.239 1.67-.239 3.259-.239 3.974 0 1.272-1.032 1.193-2.303 1.272-1.27 0-2.223.16-2.303-1.033 0-.16-.08-2.782.397-5.564-1.588-.716-2.62-1.272-2.7-1.352a3.293 3.293 0 01-.335-.216C4.012 17.55 3 19.598 3 21.223c0 3.815 1.112 3.418 1.112 3.418.476 0 1.27-.795 1.985-1.67C7.765 27.662 11.735 31 16.5 31c4.765 0 8.735-3.338 10.403-8.028.715.874 1.509 1.669 1.985 1.669 0 0 1.112.397 1.112-3.418 0-1.588-.968-3.631-2.126-5.443z\" /></g></g></svg>"),
 	Rules: []string{
-		"^(?!weixin|wx)([^.]+\\.)?qq\\.com$",
-		"||qqzaixian.com^",
+		"||qq-video.cdn-go.cn^",
+		"||qq.com^$denyallow=wx.qq.com|weixin.qq.com",
+		"||url.cn^",
 	},
 }, {
 	ID:      "reddit",
@@ -297,8 +324,11 @@ var blockedServices = []blockedService{{
 	Name:    "Skype",
 	IconSVG: []byte("<svg xmlns=\"http://www.w3.org/2000/svg\" fill=\"currentColor\" viewBox=\"0 0 26 26\"><path d=\"M23.363 14.387c.153-.739.23-1.5.23-2.266C23.594 5.883 18.45.805 12.122.805c-.594 0-1.191.047-1.781.136A6.891 6.891 0 0 0 6.852 0C3.074 0 0 3.035 0 6.762c0 1.144.293 2.27.852 3.265-.133.688-.2 1.391-.2 2.094 0 6.238 5.149 11.316 11.47 11.316.648 0 1.3-.054 1.94-.164.95.477 2.012.727 3.086.727C20.926 24 24 20.969 24 17.238c0-1.004-.215-1.96-.637-2.851zM17.758 17.3c-.508.707-1.258 1.27-2.23 1.668-.966.394-2.122.593-3.434.593-1.578 0-2.903-.273-3.934-.812a5.074 5.074 0 0 1-1.808-1.582c-.47-.664-.707-1.324-.707-1.961 0-.395.156-.738.457-1.023.304-.278.687-.418 1.148-.418.379 0 .703.109.969.332.254.21.469.523.644.93.192.437.407.808.633 1.1.211.282.524.52.918.704.399.188.938.281 1.598.281.91 0 1.652-.191 2.215-.57.546-.367.812-.813.812-1.352 0-.43-.14-.765-.422-1.027-.3-.277-.699-.492-1.176-.637-.5-.152-1.18-.32-2.015-.496-1.14-.238-2.11-.523-2.88-.847-.788-.332-1.425-.79-1.89-1.364-.472-.582-.71-1.312-.71-2.172 0-.816.253-1.554.75-2.191.488-.633 1.206-1.125 2.132-1.46.91-.333 1.996-.5 3.223-.5.98 0 1.844.108 2.566.331.723.223 1.336.524 1.813.89.484.376.843.774 1.07 1.188.227.418.344.832.344 1.235 0 .386-.153.738-.453 1.046-.297.31-.68.465-1.125.465-.41 0-.727-.097-.95-.289-.207-.18-.418-.46-.656-.863-.273-.516-.605-.918-.984-1.203-.371-.277-.989-.418-1.836-.418-.79 0-1.43.156-1.902.465-.461.293-.684.633-.684 1.039 0 .246.07.449.219.629.156.187.379.351.656.488.289.145.586.258.883.34.308.082.82.207 1.523.367.887.191 1.707.398 2.43.625.73.234 1.363.516 1.879.848.527.34.941.773 1.238 1.293.297.52.445 1.16.445 1.91a4.07 4.07 0 0 1-.77 2.418zm0 0\" /></svg>"),
 	Rules: []string{
+		"||edge-skype-com.s-0001.s-msedge.net^",
+		"||skype-edf.akadns.net^",
 		"||skype.com^",
 		"||skypeassets.com^",
+		"||skypedata.akadns.net^",
 	},
 }, {
 	ID:      "snapchat",
@@ -359,10 +389,14 @@ var blockedServices = []blockedService{{
 		"||bdurl.com^",
 		"||bytecdn.cn^",
 		"||bytedance.map.fastly.net^",
+		"||bytedapm.com^",
 		"||byteimg.com^",
+		"||byteoversea.com^",
 		"||douyin.com^",
 		"||douyincdn.com^",
-		"||ixigua.com^",
+		"||douyinpic.com^",
+		"||douyinstatic.com^",
+		"||douyinvod.com^",
 		"||ixigua.com^",
 		"||ixiguavideo.com^",
 		"||muscdn.com^",
@@ -375,6 +409,7 @@ var blockedServices = []blockedService{{
 		"||toutiao.com^",
 		"||toutiaocloud.com^",
 		"||toutiaocloud.net^",
+		"||toutiaovod.com^",
 	},
 }, {
 	ID:      "tinder",
@@ -437,7 +472,9 @@ var blockedServices = []blockedService{{
 	IconSVG: []byte("<svg xmlns=\"http://www.w3.org/2000/svg\" fill=\"currentColor\" viewBox=\"0 0 50 50\"><path d=\"M 19 6 C 9.625 6 2 12.503906 2 20.5 C 2 24.769531 4.058594 28.609375 7.816406 31.390625 L 5.179688 39.304688 L 13.425781 34.199219 C 15.714844 34.917969 18.507813 35.171875 21.203125 34.875 C 23.390625 39.109375 28.332031 42 34 42 C 35.722656 42 37.316406 41.675781 38.796875 41.234375 L 45.644531 45.066406 L 43.734375 38.515625 C 46.3125 36.375 48 33.394531 48 30 C 48 23.789063 42.597656 18.835938 35.75 18.105469 C 34.40625 11.152344 27.367188 6 19 6 Z M 13 14 C 14.101563 14 15 14.898438 15 16 C 15 17.101563 14.101563 18 13 18 C 11.898438 18 11 17.101563 11 16 C 11 14.898438 11.898438 14 13 14 Z M 25 14 C 26.101563 14 27 14.898438 27 16 C 27 17.101563 26.101563 18 25 18 C 23.898438 18 23 17.101563 23 16 C 23 14.898438 23.898438 14 25 14 Z M 34 20 C 40.746094 20 46 24.535156 46 30 C 46 32.957031 44.492188 35.550781 42.003906 37.394531 L 41.445313 37.8125 L 42.355469 40.933594 L 39.105469 39.109375 L 38.683594 39.25 C 37.285156 39.71875 35.6875 40 34 40 C 27.253906 40 22 35.464844 22 30 C 22 24.535156 27.253906 20 34 20 Z M 29.5 26 C 28.699219 26 28 26.699219 28 27.5 C 28 28.300781 28.699219 29 29.5 29 C 30.300781 29 31 28.300781 31 27.5 C 31 26.699219 30.300781 26 29.5 26 Z M 38.5 26 C 37.699219 26 37 26.699219 37 27.5 C 37 28.300781 37.699219 29 38.5 29 C 39.300781 29 40 28.300781 40 27.5 C 40 26.699219 39.300781 26 38.5 26 Z\" /></svg>"),
 	Rules: []string{
 		"||wechat.com^",
+		"||weixin.qq.com.cn^",
 		"||weixin.qq.com^",
+		"||weixinbridge.com^",
 		"||wx.qq.com^",
 	},
 }, {
@@ -445,7 +482,9 @@ var blockedServices = []blockedService{{
 	Name:    "Weibo",
 	IconSVG: []byte("<svg xmlns=\"http://www.w3.org/2000/svg\" fill=\"currentColor\" viewBox=\"0 0 50 50\"><path d=\"M 35 6 C 34.222656 6 33.472656 6.078125 32.75 6.207031 C 32.207031 6.300781 31.84375 6.820313 31.9375 7.363281 C 32.03125 7.910156 32.550781 8.273438 33.09375 8.179688 C 33.726563 8.066406 34.359375 8 35 8 C 41.085938 8 46 12.914063 46 19 C 46 20.316406 45.757813 21.574219 45.328125 22.753906 C 45.195313 23.09375 45.253906 23.476563 45.484375 23.757813 C 45.71875 24.039063 46.082031 24.171875 46.441406 24.105469 C 46.800781 24.039063 47.09375 23.78125 47.207031 23.4375 C 47.710938 22.054688 48 20.566406 48 19 C 48 11.832031 42.167969 6 35 6 Z M 35 12 C 34.574219 12 34.171875 12.042969 33.789063 12.109375 C 33.246094 12.207031 32.878906 12.722656 32.976563 13.269531 C 33.070313 13.8125 33.589844 14.175781 34.132813 14.082031 C 34.425781 14.03125 34.714844 14 35 14 C 37.773438 14 40 16.226563 40 19 C 40 19.597656 39.890625 20.167969 39.691406 20.707031 C 39.503906 21.226563 39.773438 21.800781 40.292969 21.988281 C 40.8125 22.175781 41.386719 21.910156 41.574219 21.390625 C 41.84375 20.648438 42 19.84375 42 19 C 42 15.144531 38.855469 12 35 12 Z M 21.175781 12.40625 C 17.964844 12.34375 13.121094 14.878906 8.804688 19.113281 C 4.511719 23.40625 2 27.90625 2 31.78125 C 2 39.3125 11.628906 43.8125 21.152344 43.8125 C 33.5 43.8125 41.765625 36.699219 41.765625 31.046875 C 41.765625 27.59375 38.835938 25.707031 36.21875 24.871094 C 35.59375 24.660156 35.175781 24.558594 35.488281 23.71875 C 35.695313 23.21875 36 22.265625 36 21 C 36 19.5625 35 18.316406 33 18.09375 C 32.007813 17.984375 28 18 25.339844 19.113281 C 25.339844 19.113281 23.871094 19.746094 24.289063 18.59375 C 25.023438 16.292969 24.917969 14.40625 23.765625 13.359375 C 23.140625 12.730469 22.25 12.425781 21.175781 12.40625 Z M 20.3125 23.933594 C 28.117188 23.933594 34.441406 27.914063 34.441406 32.828125 C 34.441406 37.738281 28.117188 41.71875 20.3125 41.71875 C 12.511719 41.71875 6.1875 37.738281 6.1875 32.828125 C 6.1875 27.914063 12.511719 23.933594 20.3125 23.933594 Z M 19.265625 26.023438 C 16.246094 26.046875 13.3125 27.699219 12.039063 30.246094 C 10.46875 33.484375 11.933594 37.042969 15.699219 38.191406 C 19.464844 39.445313 23.960938 37.5625 25.53125 34.113281 C 27.097656 30.769531 25.113281 27.214844 21.347656 26.277344 C 20.660156 26.097656 19.960938 26.019531 19.265625 26.023438 Z M 20.824219 30.25 C 21.402344 30.25 21.871094 30.714844 21.871094 31.292969 C 21.871094 31.871094 21.402344 32.339844 20.824219 32.339844 C 20.246094 32.339844 19.777344 31.871094 19.777344 31.292969 C 19.777344 30.714844 20.246094 30.25 20.824219 30.25 Z M 16.417969 31.292969 C 16.746094 31.296875 17.074219 31.347656 17.382813 31.453125 C 18.722656 31.878906 19.132813 33.148438 18.308594 34.207031 C 17.589844 35.265625 15.945313 35.792969 14.707031 35.265625 C 13.476563 34.738281 13.167969 33.464844 13.886719 32.515625 C 14.425781 31.71875 15.429688 31.28125 16.417969 31.292969 Z\" /></svg>"),
 	Rules: []string{
+		"||weibo.cn^",
 		"||weibo.com^",
+		"||weibocdn.com^",
 	},
 }, {
 	ID:      "whatsapp",
@@ -461,11 +500,21 @@ var blockedServices = []blockedService{{
 	IconSVG: []byte("<svg xmlns=\"http://www.w3.org/2000/svg\" fill=\"currentColor\" viewBox=\"0 0 24 24\"><path d=\"M19.695 4.04S15.348 3.2 12 3.2s-7.695.84-7.695.84L1.602 7.2v9.6l2.703 3.16s4.347.84 7.695.84 7.695-.84 7.695-.84l2.703-3.16V12 7.2zM9.602 15.68V8.32L16 12zm0 0\" /><path d=\"M19.2 4a3.198 3.198 0 1 0 0 6.398c1.769 0 3.198-1.43 3.198-3.199C22.398 5.434 20.968 4 19.2 4zm0 9.602a3.198 3.198 0 1 0 0 6.398c1.769 0 3.198-1.434 3.198-3.2 0-1.769-1.43-3.198-3.199-3.198zM1.601 7.199c0 1.77 1.43 3.2 3.199 3.2 1.765 0 2.398-1.43 2.398-3.2C7.2 5.434 6.566 4 4.801 4 3.03 4 1.6 5.434 1.6 7.2zM4.8 13.602c-1.77 0-3.2 1.43-3.2 3.199A3.198 3.198 0 1 0 8 16.8c0-1.77-1.434-3.2-3.2-3.2zm0 0\" /></svg>"),
 	Rules: []string{
 		"||googlevideo.com^",
+		"||wide-youtube.l.google.com^",
 		"||youtu.be^",
 		"||youtube",
 		"||youtube-nocookie.com^",
 		"||youtube.com^",
 		"||youtubei.googleapis.com^",
+		"||youtubekids.com^",
 		"||ytimg.com^",
 	},
+}, {
+	ID:      "zhihu",
+	Name:    "Zhihu",
+	IconSVG: []byte("<svg xmlns=\"http://www.w3.org/2000/svg\" fill=\"currentColor\" viewBox=\"0 0 30 30\"><path d=\"M14.46 14.191H9.982c0-.471.033-.954.039-1.458v-5.5h5.106V5.935a1.352 1.352 0 00-.404-.957 1.378 1.378 0 00-.968-.396H5.783c.028-.088.056-.177.084-.255.274-.82 1.153-3.326 1.153-3.326a4.262 4.262 0 00-2.413.698c-.57.4-.912.682-1.371 1.946-.532 1.453-.997 2.856-1.31 3.693C1.444 8.674.28 11.025.28 11.025a5.85 5.85 0 002.52-.61c1.119-.593 1.679-1.502 2.054-2.883l.09-.3h2.334v5.5c0 .5-.045.982-.073 1.46h-4.12c-.71 0-1.39.278-1.893.775a2.638 2.638 0 00-.783 1.874h6.527a17.717 17.717 0 01-.778 3.649 16.796 16.796 0 01-3.012 5.273A33.104 33.104 0 010 28.74s3.13 1.175 5.425-.954c1.388-1.292 2.631-3.814 3.23-5.727a28.09 28.09 0 001.12-5.229h5.967v-1.37a1.254 1.254 0 00-.373-.899 1.279 1.279 0 00-.909-.37zm-3.19 5.484l-2.312 1.491 5.038 7.458a6.905 6.905 0 00.672-2.218 3.15 3.15 0 00-.28-2.168l-3.118-4.563zM29.05 4.582H16.733V25.94h3.018l.403 2.572 4.081-2.572h4.815V4.582zm-5.207 18.69l-2.396 1.509-.235-1.508h-1.724V7.233h6.78v16.04h-2.425z\" /></svg>"),
+	Rules: []string{
+		"||zhihu.com^",
+		"||zhimg.com^",
+	},
 }}
--- a/internal/home/clients.go
+++ b/internal/home/clients.go
@@ -129,7 +129,7 @@ type RuntimeClientWHOISInfo struct {

 type clientsContainer struct {
 	// TODO(a.garipov): Perhaps use a number of separate indices for
-	// different types (string, net.IP, and so on).
+	// different types (string, netip.Addr, and so on).
 	list    map[string]*Client // name -> client
 	idIndex map[string]*Client // ID -> client

@@ -333,7 +333,7 @@ func (clients *clientsContainer) onDHCPLeaseChanged(flags int) {
 }

 // exists checks if client with this IP address already exists.
-func (clients *clientsContainer) exists(ip net.IP, source clientSource) (ok bool) {
+func (clients *clientsContainer) exists(ip netip.Addr, source clientSource) (ok bool) {
 	clients.lock.Lock()
 	defer clients.lock.Unlock()

@@ -342,7 +342,7 @@ func (clients *clientsContainer) exists(ip net.IP, source clientSource) (ok bool
 		return true
 	}

-	rc, ok := clients.findRuntimeClientLocked(ip)
+	rc, ok := clients.ipToRC[ip]
 	if !ok {
 		return false
 	}
@@ -371,7 +371,8 @@ func (clients *clientsContainer) findMultiple(ids []string) (c *querylog.Client,
 	var artClient *querylog.Client
 	var art bool
 	for _, id := range ids {
-		c, art = clients.clientOrArtificial(net.ParseIP(id), id)
+		ip, _ := netip.ParseAddr(id)
+		c, art = clients.clientOrArtificial(ip, id)
 		if art {
 			artClient = c

@@ -389,7 +390,7 @@ func (clients *clientsContainer) findMultiple(ids []string) (c *querylog.Client,
 // records about this client besides maybe whether or not it is blocked.  c is
 // never nil.
 func (clients *clientsContainer) clientOrArtificial(
-	ip net.IP,
+	ip netip.Addr,
 	id string,
 ) (c *querylog.Client, art bool) {
 	defer func() {
@@ -406,13 +407,6 @@ func (clients *clientsContainer) clientOrArtificial(
 		}, false
 	}

-	if ip == nil {
-		// Technically should never happen, but still.
-		return &querylog.Client{
-			Name: "",
-		}, true
-	}
-
 	var rc *RuntimeClient
 	rc, ok = clients.findRuntimeClient(ip)
 	if ok {
@@ -492,19 +486,20 @@ func (clients *clientsContainer) findLocked(id string) (c *Client, ok bool) {
 		return c, true
 	}

-	ip := net.ParseIP(id)
-	if ip == nil {
+	ip, err := netip.ParseAddr(id)
+	if err != nil {
 		return nil, false
 	}

 	for _, c = range clients.list {
 		for _, id := range c.IDs {
-			_, ipnet, err := net.ParseCIDR(id)
+			var n netip.Prefix
+			n, err = netip.ParsePrefix(id)
 			if err != nil {
 				continue
 			}

-			if ipnet.Contains(ip) {
+			if n.Contains(ip) {
 				return c, true
 			}
 		}
@@ -514,19 +509,20 @@ func (clients *clientsContainer) findLocked(id string) (c *Client, ok bool) {
 		return nil, false
 	}

-	macFound := clients.dhcpServer.FindMACbyIP(ip)
+	macFound := clients.dhcpServer.FindMACbyIP(ip.AsSlice())
 	if macFound == nil {
 		return nil, false
 	}

 	for _, c = range clients.list {
 		for _, id := range c.IDs {
-			hwAddr, err := net.ParseMAC(id)
+			var mac net.HardwareAddr
+			mac, err = net.ParseMAC(id)
 			if err != nil {
 				continue
 			}

-			if bytes.Equal(hwAddr, macFound) {
+			if bytes.Equal(mac, macFound) {
 				return c, true
 			}
 		}
@@ -535,32 +531,18 @@ func (clients *clientsContainer) findLocked(id string) (c *Client, ok bool) {
 	return nil, false
 }

-// findRuntimeClientLocked finds a runtime client by their IP address.  For
-// internal use only.
-func (clients *clientsContainer) findRuntimeClientLocked(ip net.IP) (rc *RuntimeClient, ok bool) {
-	// TODO(a.garipov):  Remove once we switch to netip.Addr more fully.
-	ipAddr, err := netutil.IPToAddrNoMapped(ip)
-	if err != nil {
-		log.Error("clients: bad client ip %v: %s", ip, err)
-
-		return nil, false
-	}
-
-	rc, ok = clients.ipToRC[ipAddr]
-
-	return rc, ok
-}
-
 // findRuntimeClient finds a runtime client by their IP.
-func (clients *clientsContainer) findRuntimeClient(ip net.IP) (rc *RuntimeClient, ok bool) {
-	if ip == nil {
+func (clients *clientsContainer) findRuntimeClient(ip netip.Addr) (rc *RuntimeClient, ok bool) {
+	if ip == (netip.Addr{}) {
 		return nil, false
 	}

 	clients.lock.Lock()
 	defer clients.lock.Unlock()

-	return clients.findRuntimeClientLocked(ip)
+	rc, ok = clients.ipToRC[ip]
+
+	return rc, ok
 }

 // check validates the client.
@@ -578,14 +560,16 @@ func (clients *clientsContainer) check(c *Client) (err error) {

 	for i, id := range c.IDs {
 		// Normalize structured data.
-		var ip net.IP
-		var ipnet *net.IPNet
-		var mac net.HardwareAddr
-		if ip = net.ParseIP(id); ip != nil {
+		var (
+			ip  netip.Addr
+			n   netip.Prefix
+			mac net.HardwareAddr
+		)
+
+		if ip, err = netip.ParseAddr(id); err == nil {
 			c.IDs[i] = ip.String()
-		} else if ip, ipnet, err = net.ParseCIDR(id); err == nil {
-			ipnet.IP = ip
-			c.IDs[i] = ipnet.String()
+		} else if n, err = netip.ParsePrefix(id); err == nil {
+			c.IDs[i] = n.String()
 		} else if mac, err = net.ParseMAC(id); err == nil {
 			c.IDs[i] = mac.String()
 		} else if err = dnsforward.ValidateClientID(id); err == nil {
@@ -750,7 +734,7 @@ func (clients *clientsContainer) Update(name string, c *Client) (err error) {
 }

 // setWHOISInfo sets the WHOIS information for a client.
-func (clients *clientsContainer) setWHOISInfo(ip net.IP, wi *RuntimeClientWHOISInfo) {
+func (clients *clientsContainer) setWHOISInfo(ip netip.Addr, wi *RuntimeClientWHOISInfo) {
 	clients.lock.Lock()
 	defer clients.lock.Unlock()

@@ -760,7 +744,7 @@ func (clients *clientsContainer) setWHOISInfo(ip net.IP, wi *RuntimeClientWHOISI
 		return
 	}

-	rc, ok := clients.findRuntimeClientLocked(ip)
+	rc, ok := clients.ipToRC[ip]
 	if ok {
 		rc.WHOISInfo = wi
 		log.Debug("clients: set whois info for runtime client %s: %+v", rc.Host, wi)
@@ -776,32 +760,22 @@ func (clients *clientsContainer) setWHOISInfo(ip net.IP, wi *RuntimeClientWHOISI

 	rc.WHOISInfo = wi

-	// TODO(a.garipov):  Remove once we switch to netip.Addr more fully.
-	ipAddr, err := netutil.IPToAddrNoMapped(ip)
-	if err != nil {
-		log.Error("clients: bad client ip %v: %s", ip, err)
-
-		return
-	}
-
-	clients.ipToRC[ipAddr] = rc
+	clients.ipToRC[ip] = rc

 	log.Debug("clients: set whois info for runtime client with ip %s: %+v", ip, wi)
 }

 // AddHost adds a new IP-hostname pairing.  The priorities of the sources are
 // taken into account.  ok is true if the pairing was added.
-func (clients *clientsContainer) AddHost(ip net.IP, host string, src clientSource) (ok bool, err error) {
+func (clients *clientsContainer) AddHost(
+	ip netip.Addr,
+	host string,
+	src clientSource,
+) (ok bool) {
 	clients.lock.Lock()
 	defer clients.lock.Unlock()

-	// TODO(a.garipov):  Remove once we switch to netip.Addr more fully.
-	ipAddr, err := netutil.IPToAddrNoMapped(ip)
-	if err != nil {
-		return false, fmt.Errorf("adding host: %w", err)
-	}
-
-	return clients.addHostLocked(ipAddr, host, src), nil
+	return clients.addHostLocked(ip, host, src)
 }

 // addHostLocked adds a new IP-hostname pairing.  clients.lock is expected to be
--- a/internal/home/clients_test.go
+++ b/internal/home/clients_test.go
@@ -22,8 +22,18 @@ func TestClients(t *testing.T) {
 	clients.Init(nil, nil, nil, nil)

 	t.Run("add_success", func(t *testing.T) {
+		var (
+			cliNone = "1.2.3.4"
+			cli1    = "1.1.1.1"
+			cli2    = "2.2.2.2"
+
+			cliNoneIP = netip.MustParseAddr(cliNone)
+			cli1IP    = netip.MustParseAddr(cli1)
+			cli2IP    = netip.MustParseAddr(cli2)
+		)
+
 		c := &Client{
-			IDs:  []string{"1.1.1.1", "1:2:3::4", "aa:aa:aa:aa:aa:aa"},
+			IDs:  []string{cli1, "1:2:3::4", "aa:aa:aa:aa:aa:aa"},
 			Name: "client1",
 		}

@@ -33,7 +43,7 @@ func TestClients(t *testing.T) {
 		assert.True(t, ok)

 		c = &Client{
-			IDs:  []string{"2.2.2.2"},
+			IDs:  []string{cli2},
 			Name: "client2",
 		}

@@ -42,7 +52,7 @@ func TestClients(t *testing.T) {

 		assert.True(t, ok)

-		c, ok = clients.Find("1.1.1.1")
+		c, ok = clients.Find(cli1)
 		require.True(t, ok)

 		assert.Equal(t, "client1", c.Name)
@@ -52,14 +62,14 @@ func TestClients(t *testing.T) {

 		assert.Equal(t, "client1", c.Name)

-		c, ok = clients.Find("2.2.2.2")
+		c, ok = clients.Find(cli2)
 		require.True(t, ok)

 		assert.Equal(t, "client2", c.Name)

-		assert.False(t, clients.exists(net.IP{1, 2, 3, 4}, ClientSourceHostsFile))
-		assert.True(t, clients.exists(net.IP{1, 1, 1, 1}, ClientSourceHostsFile))
-		assert.True(t, clients.exists(net.IP{2, 2, 2, 2}, ClientSourceHostsFile))
+		assert.False(t, clients.exists(cliNoneIP, ClientSourceHostsFile))
+		assert.True(t, clients.exists(cli1IP, ClientSourceHostsFile))
+		assert.True(t, clients.exists(cli2IP, ClientSourceHostsFile))
 	})

 	t.Run("add_fail_name", func(t *testing.T) {
@@ -103,23 +113,31 @@ func TestClients(t *testing.T) {
 	})

 	t.Run("update_success", func(t *testing.T) {
+		var (
+			cliOld = "1.1.1.1"
+			cliNew = "1.1.1.2"
+
+			cliOldIP = netip.MustParseAddr(cliOld)
+			cliNewIP = netip.MustParseAddr(cliNew)
+		)
+
 		err := clients.Update("client1", &Client{
-			IDs:  []string{"1.1.1.2"},
+			IDs:  []string{cliNew},
 			Name: "client1",
 		})
 		require.NoError(t, err)

-		assert.False(t, clients.exists(net.IP{1, 1, 1, 1}, ClientSourceHostsFile))
-		assert.True(t, clients.exists(net.IP{1, 1, 1, 2}, ClientSourceHostsFile))
+		assert.False(t, clients.exists(cliOldIP, ClientSourceHostsFile))
+		assert.True(t, clients.exists(cliNewIP, ClientSourceHostsFile))

 		err = clients.Update("client1", &Client{
-			IDs:            []string{"1.1.1.2"},
+			IDs:            []string{cliNew},
 			Name:           "client1-renamed",
 			UseOwnSettings: true,
 		})
 		require.NoError(t, err)

-		c, ok := clients.Find("1.1.1.2")
+		c, ok := clients.Find(cliNew)
 		require.True(t, ok)

 		assert.Equal(t, "client1-renamed", c.Name)
@@ -132,14 +150,14 @@ func TestClients(t *testing.T) {

 		require.Len(t, c.IDs, 1)

-		assert.Equal(t, "1.1.1.2", c.IDs[0])
+		assert.Equal(t, cliNew, c.IDs[0])
 	})

 	t.Run("del_success", func(t *testing.T) {
 		ok := clients.Del("client1-renamed")
 		require.True(t, ok)

-		assert.False(t, clients.exists(net.IP{1, 1, 1, 2}, ClientSourceHostsFile))
+		assert.False(t, clients.exists(netip.MustParseAddr("1.1.1.2"), ClientSourceHostsFile))
 	})

 	t.Run("del_fail", func(t *testing.T) {
@@ -148,45 +166,33 @@ func TestClients(t *testing.T) {
 	})

 	t.Run("addhost_success", func(t *testing.T) {
-		ip := net.IP{1, 1, 1, 1}
-
-		ok, err := clients.AddHost(ip, "host", ClientSourceARP)
-		require.NoError(t, err)
-
+		ip := netip.MustParseAddr("1.1.1.1")
+		ok := clients.AddHost(ip, "host", ClientSourceARP)
 		assert.True(t, ok)

-		ok, err = clients.AddHost(ip, "host2", ClientSourceARP)
-		require.NoError(t, err)
-
+		ok = clients.AddHost(ip, "host2", ClientSourceARP)
 		assert.True(t, ok)

-		ok, err = clients.AddHost(ip, "host3", ClientSourceHostsFile)
-		require.NoError(t, err)
-
+		ok = clients.AddHost(ip, "host3", ClientSourceHostsFile)
 		assert.True(t, ok)

 		assert.True(t, clients.exists(ip, ClientSourceHostsFile))
 	})

 	t.Run("dhcp_replaces_arp", func(t *testing.T) {
-		ip := net.IP{1, 2, 3, 4}
-
-		ok, err := clients.AddHost(ip, "from_arp", ClientSourceARP)
-		require.NoError(t, err)
-
+		ip := netip.MustParseAddr("1.2.3.4")
+		ok := clients.AddHost(ip, "from_arp", ClientSourceARP)
 		assert.True(t, ok)
 		assert.True(t, clients.exists(ip, ClientSourceARP))

-		ok, err = clients.AddHost(ip, "from_dhcp", ClientSourceDHCP)
-		require.NoError(t, err)
-
+		ok = clients.AddHost(ip, "from_dhcp", ClientSourceDHCP)
 		assert.True(t, ok)
 		assert.True(t, clients.exists(ip, ClientSourceDHCP))
 	})

 	t.Run("addhost_fail", func(t *testing.T) {
-		ok, err := clients.AddHost(net.IP{1, 1, 1, 1}, "host1", ClientSourceRDNS)
-		require.NoError(t, err)
+		ip := netip.MustParseAddr("1.1.1.1")
+		ok := clients.AddHost(ip, "host1", ClientSourceRDNS)
 		assert.False(t, ok)
 	})
 }
@@ -203,7 +209,7 @@ func TestClientsWHOIS(t *testing.T) {

 	t.Run("new_client", func(t *testing.T) {
 		ip := netip.MustParseAddr("1.1.1.255")
-		clients.setWHOISInfo(ip.AsSlice(), whois)
+		clients.setWHOISInfo(ip, whois)
 		rc := clients.ipToRC[ip]
 		require.NotNil(t, rc)

@@ -212,12 +218,10 @@ func TestClientsWHOIS(t *testing.T) {

 	t.Run("existing_auto-client", func(t *testing.T) {
 		ip := netip.MustParseAddr("1.1.1.1")
-		ok, err := clients.AddHost(ip.AsSlice(), "host", ClientSourceRDNS)
-		require.NoError(t, err)
-
+		ok := clients.AddHost(ip, "host", ClientSourceRDNS)
 		assert.True(t, ok)

-		clients.setWHOISInfo(ip.AsSlice(), whois)
+		clients.setWHOISInfo(ip, whois)
 		rc := clients.ipToRC[ip]
 		require.NotNil(t, rc)

@@ -234,7 +238,7 @@ func TestClientsWHOIS(t *testing.T) {
 		require.NoError(t, err)
 		assert.True(t, ok)

-		clients.setWHOISInfo(ip.AsSlice(), whois)
+		clients.setWHOISInfo(ip, whois)
 		rc := clients.ipToRC[ip]
 		require.Nil(t, rc)

@@ -249,7 +253,7 @@ func TestClientsAddExisting(t *testing.T) {
 	clients.Init(nil, nil, nil, nil)

 	t.Run("simple", func(t *testing.T) {
-		ip := net.IP{1, 1, 1, 1}
+		ip := netip.MustParseAddr("1.1.1.1")

 		// Add a client.
 		ok, err := clients.Add(&Client{
@@ -260,8 +264,7 @@ func TestClientsAddExisting(t *testing.T) {
 		assert.True(t, ok)

 		// Now add an auto-client with the same IP.
-		ok, err = clients.AddHost(ip, "test", ClientSourceRDNS)
-		require.NoError(t, err)
+		ok = clients.AddHost(ip, "test", ClientSourceRDNS)
 		assert.True(t, ok)
 	})

--- a/internal/home/clientshttp.go
+++ b/internal/home/clientshttp.go
@@ -3,8 +3,8 @@ package home
 import (
 	"encoding/json"
 	"fmt"
-	"net"
 	"net/http"
+	"net/netip"

 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 )
@@ -47,8 +47,8 @@ type runtimeClientJSON struct {
 	WHOISInfo *RuntimeClientWHOISInfo `json:"whois_info"`

 	Name   string       `json:"name"`
+	IP     netip.Addr   `json:"ip"`
 	Source clientSource `json:"source"`
-	IP     net.IP       `json:"ip"`
 }

 type clientListJSON struct {
@@ -75,7 +75,7 @@ func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, r *http

 			Name:   rc.Host,
 			Source: rc.Source,
-			IP:     ip.AsSlice(),
+			IP:     ip,
 		}

 		data.RuntimeClients = append(data.RuntimeClients, cj)
@@ -218,7 +218,7 @@ func (clients *clientsContainer) handleFindClient(w http.ResponseWriter, r *http
 			break
 		}

-		ip := net.ParseIP(idStr)
+		ip, _ := netip.ParseAddr(idStr)
 		c, ok := clients.Find(idStr)
 		var cj *clientJSON
 		if !ok {
@@ -240,7 +240,7 @@ func (clients *clientsContainer) handleFindClient(w http.ResponseWriter, r *http
 // findRuntime looks up the IP in runtime and temporary storages, like
 // /etc/hosts tables, DHCP leases, or blocklists.  cj is guaranteed to be
 // non-nil.
-func (clients *clientsContainer) findRuntime(ip net.IP, idStr string) (cj *clientJSON) {
+func (clients *clientsContainer) findRuntime(ip netip.Addr, idStr string) (cj *clientJSON) {
 	rc, ok := clients.findRuntimeClient(ip)
 	if !ok {
 		// It is still possible that the IP used to be in the runtime clients
--- a/internal/home/config.go
+++ b/internal/home/config.go
@@ -20,6 +20,7 @@ import (
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/AdguardTeam/golibs/timeutil"
 	"github.com/google/renameio/maybe"
+	"golang.org/x/exp/slices"
 	yaml "gopkg.in/yaml.v3"
 )

@@ -113,8 +114,8 @@ type configuration struct {
 	// An active session is automatically refreshed once a day.
 	WebSessionTTLHours uint32 `yaml:"web_session_ttl"`

-	DNS dnsConfig         `yaml:"dns"`
-	TLS tlsConfigSettings `yaml:"tls"`
+	DNS dnsConfig        `yaml:"dns"`
+	TLS tlsConfiguration `yaml:"tls"`

 	// Filters reflects the filters from [filtering.Config].  It's cloned to the
 	// config used in the filtering module at the startup.  Afterwards it's
@@ -199,7 +200,8 @@ type dnsConfig struct {
 	UseHTTP3Upstreams bool `yaml:"use_http3_upstreams"`
 }

-type tlsConfigSettings struct {
+// tlsConfiguration is the on-disk TLS configuration.
+type tlsConfiguration struct {
 	Enabled         bool   `yaml:"enabled" json:"enabled"`                                 // Enabled is the encryption (DoT/DoH/HTTPS) status
 	ServerName      string `yaml:"server_name" json:"server_name,omitempty"`               // ServerName is the hostname of your HTTPS/TLS server
 	ForceHTTPS      bool   `yaml:"force_https" json:"force_https"`                         // ForceHTTPS: if true, forces HTTP->HTTPS redirect
@@ -223,6 +225,29 @@ type tlsConfigSettings struct {
 	dnsforward.TLSConfig `yaml:",inline" json:",inline"`
 }

+// cloneForEncoding returns a clone of c with all top-level fields of c and all
+// exported and YAML-encoded fields of c.TLSConfig cloned.
+//
+// TODO(a.garipov): This is better than races, but still not good enough.
+func (c *tlsConfiguration) cloneForEncoding() (cloned *tlsConfiguration) {
+	if c == nil {
+		return nil
+	}
+
+	v := *c
+	cloned = &v
+	cloned.TLSConfig = dnsforward.TLSConfig{
+		CertificateChain:   c.CertificateChain,
+		PrivateKey:         c.PrivateKey,
+		CertificatePath:    c.CertificatePath,
+		PrivateKeyPath:     c.PrivateKeyPath,
+		OverrideTLSCiphers: slices.Clone(c.OverrideTLSCiphers),
+		StrictSNICheck:     c.StrictSNICheck,
+	}
+
+	return cloned
+}
+
 // config is the global configuration structure.
 //
 // TODO(a.garipov, e.burkov): This global is awful and must be removed.
@@ -273,7 +298,7 @@ var config = &configuration{
 		UpstreamTimeout: timeutil.Duration{Duration: dnsforward.DefaultTimeout},
 		UsePrivateRDNS:  true,
 	},
-	TLS: tlsConfigSettings{
+	TLS: tlsConfiguration{
 		PortHTTPS:       defaultPortHTTPS,
 		PortDNSOverTLS:  defaultPortTLS, // needs to be passed through to dnsproxy
 		PortDNSOverQUIC: defaultPortQUIC,
@@ -442,7 +467,7 @@ func (c *configuration) write() (err error) {
 	}

 	if Context.tls != nil {
-		tlsConf := tlsConfigSettings{}
+		tlsConf := tlsConfiguration{}
 		Context.tls.WriteDiskConfig(&tlsConf)
 		config.TLS = tlsConf
 	}
--- a/internal/home/control.go
+++ b/internal/home/control.go
@@ -71,9 +71,7 @@ func appendDNSAddrsWithIfaces(dst []string, src []netip.Addr) (res []string, err
 // on, including the addresses on all interfaces in cases of unspecified IPs.
 func collectDNSAddresses() (addrs []string, err error) {
 	if hosts := config.DNS.BindHosts; len(hosts) == 0 {
-		addr := aghnet.IPv4Localhost()
-
-		addrs = appendDNSAddrs(addrs, addr)
+		addrs = appendDNSAddrs(addrs, netutil.IPv4Localhost())
 	} else {
 		addrs, err = appendDNSAddrsWithIfaces(addrs, hosts)
 		if err != nil {
--- a/internal/home/controlupdate.go
+++ b/internal/home/controlupdate.go
@@ -154,7 +154,7 @@ func (vr *versionResponse) setAllowedToAutoUpdate() (err error) {
 		return nil
 	}

-	tlsConf := &tlsConfigSettings{}
+	tlsConf := &tlsConfiguration{}
 	Context.tls.WriteDiskConfig(tlsConf)

 	canUpdate := true
@@ -172,7 +172,7 @@ func (vr *versionResponse) setAllowedToAutoUpdate() (err error) {

 // tlsConfUsesPrivilegedPorts returns true if the provided TLS configuration
 // indicates that privileged ports are used.
-func tlsConfUsesPrivilegedPorts(c *tlsConfigSettings) (ok bool) {
+func tlsConfUsesPrivilegedPorts(c *tlsConfiguration) (ok bool) {
 	return c.Enabled && (c.PortHTTPS < 1024 || c.PortDNSOverTLS < 1024 || c.PortDNSOverQUIC < 1024)
 }

--- a/internal/home/dns.go
+++ b/internal/home/dns.go
@@ -8,6 +8,7 @@ import (
 	"os"
 	"path/filepath"

+	"github.com/AdguardTeam/AdGuardHome/internal/aghalg"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
 	"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
 	"github.com/AdguardTeam/AdGuardHome/internal/filtering"
@@ -150,8 +151,8 @@ func isRunning() bool {
 }

 func onDNSRequest(pctx *proxy.DNSContext) {
-	ip, _ := netutil.IPAndPortFromAddr(pctx.Addr)
-	if ip == nil {
+	ip := netutil.NetAddrToAddrPort(pctx.Addr).Addr()
+	if ip == (netip.Addr{}) {
 		// This would be quite weird if we get here.
 		return
 	}
@@ -160,7 +161,8 @@ func onDNSRequest(pctx *proxy.DNSContext) {
 	if srcs.RDNS && !ip.IsLoopback() {
 		Context.rdns.Begin(ip)
 	}
-	if srcs.WHOIS && !netutil.IsSpecialPurpose(ip) {
+
+	if srcs.WHOIS && !netutil.IsSpecialPurposeAddr(ip) {
 		Context.whois.Begin(ip)
 	}
 }
@@ -193,11 +195,7 @@ func ipsToUDPAddrs(ips []netip.Addr, port int) (udpAddrs []*net.UDPAddr) {

 func generateServerConfig() (newConf dnsforward.ServerConfig, err error) {
 	dnsConf := config.DNS
-	hosts := dnsConf.BindHosts
-	if len(hosts) == 0 {
-		hosts = []netip.Addr{aghnet.IPv4Localhost()}
-	}
-
+	hosts := aghalg.CoalesceSlice(dnsConf.BindHosts, []netip.Addr{netutil.IPv4Localhost()})
 	newConf = dnsforward.ServerConfig{
 		UDPListenAddrs:  ipsToUDPAddrs(hosts, dnsConf.Port),
 		TCPListenAddrs:  ipsToTCPAddrs(hosts, dnsConf.Port),
@@ -207,7 +205,7 @@ func generateServerConfig() (newConf dnsforward.ServerConfig, err error) {
 		OnDNSRequest:    onDNSRequest,
 	}

-	tlsConf := tlsConfigSettings{}
+	tlsConf := tlsConfiguration{}
 	Context.tls.WriteDiskConfig(&tlsConf)
 	if tlsConf.Enabled {
 		newConf.TLSConfig = tlsConf.TLSConfig
@@ -252,7 +250,7 @@ func generateServerConfig() (newConf dnsforward.ServerConfig, err error) {
 	return newConf, nil
 }

-func newDNSCrypt(hosts []netip.Addr, tlsConf tlsConfigSettings) (dnscc dnsforward.DNSCryptConfig, err error) {
+func newDNSCrypt(hosts []netip.Addr, tlsConf tlsConfiguration) (dnscc dnsforward.DNSCryptConfig, err error) {
 	if tlsConf.DNSCryptConfigFile == "" {
 		return dnscc, errors.Error("no dnscrypt_config_file")
 	}
@@ -290,7 +288,7 @@ type dnsEncryption struct {
 }

 func getDNSEncryption() (de dnsEncryption) {
-	tlsConf := tlsConfigSettings{}
+	tlsConf := tlsConfiguration{}

 	Context.tls.WriteDiskConfig(&tlsConf)

@@ -400,15 +398,12 @@ func startDNSServer() error {

 	const topClientsNumber = 100 // the number of clients to get
 	for _, ip := range Context.stats.TopClientsIP(topClientsNumber) {
-		if ip == nil {
-			continue
-		}
-
 		srcs := config.Clients.Sources
 		if srcs.RDNS && !ip.IsLoopback() {
 			Context.rdns.Begin(ip)
 		}
-		if srcs.WHOIS && !netutil.IsSpecialPurpose(ip) {
+
+		if srcs.WHOIS && !netutil.IsSpecialPurposeAddr(ip) {
 			Context.whois.Begin(ip)
 		}
 	}
--- a/internal/home/home.go
+++ b/internal/home/home.go
@@ -76,9 +76,7 @@ type homeContext struct {

 	configFilename   string // Config filename (can be overridden via the command line arguments)
 	workDir          string // Location of our directory, used to protect against CWD being somewhere else
-	firstRun         bool   // if set to true, don't run any services except HTTP web interface, and serve only first-run html
 	pidFileName      string // PID file name.  Empty if no PID file was created.
-	disableUpdate    bool   // If set, don't check for updates
 	controlLock      sync.Mutex
 	tlsRoots         *x509.CertPool // list of root CAs for TLSv1.2
 	transport        *http.Transport
@@ -88,6 +86,13 @@ type homeContext struct {
 	// tlsCipherIDs are the ID of the cipher suites that AdGuard Home must use.
 	tlsCipherIDs []uint16

+	// disableUpdate, if true, tells AdGuard Home to not check for updates.
+	disableUpdate bool
+
+	// firstRun, if true, tells AdGuard Home to only start the web interface
+	// service, and only serve the first-run APIs.
+	firstRun bool
+
 	// runningAsService flag is set to true when options are passed from the service runner
 	runningAsService bool
 }
@@ -462,6 +467,15 @@ func run(opts options, clientBuildFS fs.FS) {
 			mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
 			mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
 			mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
+
+			// See profileSupportsDelta in src/net/http/pprof/pprof.go.
+			mux.Handle("/debug/pprof/allocs", pprof.Handler("allocs"))
+			mux.Handle("/debug/pprof/block", pprof.Handler("block"))
+			mux.Handle("/debug/pprof/goroutine", pprof.Handler("goroutine"))
+			mux.Handle("/debug/pprof/heap", pprof.Handler("heap"))
+			mux.Handle("/debug/pprof/mutex", pprof.Handler("mutex"))
+			mux.Handle("/debug/pprof/threadcreate", pprof.Handler("threadcreate"))
+
 			go func() {
 				log.Info("pprof: listening on localhost:6060")
 				lerr := http.ListenAndServe("localhost:6060", mux)
@@ -498,7 +512,7 @@ func run(opts options, clientBuildFS fs.FS) {
 	}
 	config.Users = nil

-	Context.tls, err = newTLSManager(config.TLS)
+	Context.tls, err = newTLSManager(&config.TLS)
 	if err != nil {
 		log.Fatalf("initializing tls: %s", err)
 	}
@@ -528,6 +542,11 @@ func run(opts options, clientBuildFS fs.FS) {
 		}
 	}

+	// TODO(a.garipov): This could be made much earlier and could be done on
+	// the first run as well, but to achieve this we need to bypass requests
+	// over dnsforward resolver.
+	cmdlineUpdate(opts)
+
 	Context.web.Start()

 	// wait indefinitely for other go-routines to complete their job
@@ -562,7 +581,7 @@ func checkPermissions() {
 	}

 	// We should check if AdGuard Home is able to bind to port 53
-	err := aghnet.CheckPort("tcp", netip.AddrPortFrom(aghnet.IPv4Localhost(), defaultPortDNS))
+	err := aghnet.CheckPort("tcp", netip.AddrPortFrom(netutil.IPv4Localhost(), defaultPortDNS))
 	if err != nil {
 		if errors.Is(err, os.ErrPermission) {
 			log.Fatal(`Permission check failed.
@@ -798,7 +817,7 @@ func printWebAddrs(proto, addr string, port, betaPort int) {
 // printHTTPAddresses prints the IP addresses which user can use to access the
 // admin interface.  proto is either schemeHTTP or schemeHTTPS.
 func printHTTPAddresses(proto string) {
-	tlsConf := tlsConfigSettings{}
+	tlsConf := tlsConfiguration{}
 	if Context.tls != nil {
 		Context.tls.WriteDiskConfig(&tlsConf)
 	}
@@ -913,3 +932,37 @@ type jsonError struct {
 	// Message is the error message, an opaque string.
 	Message string `json:"message"`
 }
+
+// cmdlineUpdate updates current application and exits.
+func cmdlineUpdate(opts options) {
+	if !opts.performUpdate {
+		return
+	}
+
+	log.Info("starting update")
+
+	if Context.firstRun {
+		log.Info("update not allowed on first run")
+
+		os.Exit(0)
+	}
+
+	_, err := Context.updater.VersionInfo(true)
+	if err != nil {
+		vcu := Context.updater.VersionCheckURL()
+		log.Error("getting version info from %s: %s", vcu, err)
+
+		os.Exit(0)
+	}
+
+	if Context.updater.NewVersion() == "" {
+		log.Info("no updates available")
+
+		os.Exit(0)
+	}
+
+	err = Context.updater.Update()
+	fatalOnError(err)
+
+	os.Exit(0)
+}
--- a/internal/home/mobileconfig_test.go
+++ b/internal/home/mobileconfig_test.go
@@ -32,7 +32,11 @@ func setupDNSIPs(t testing.TB) {
 		},
 	}

-	Context.tls = &tlsManager{}
+	var err error
+	Context.tls, err = newTLSManager(&tlsConfiguration{
+		Enabled: true,
+	})
+	require.NoError(t, err)
 }

 func TestHandleMobileConfigDoH(t *testing.T) {
@@ -65,7 +69,11 @@ func TestHandleMobileConfigDoH(t *testing.T) {
 		oldTLSConf := Context.tls
 		t.Cleanup(func() { Context.tls = oldTLSConf })

-		Context.tls = &tlsManager{conf: tlsConfigSettings{}}
+		var err error
+		Context.tls, err = newTLSManager(&tlsConfiguration{
+			Enabled: true,
+		})
+		require.NoError(t, err)

 		r, err := http.NewRequest(http.MethodGet, "https://example.com:12345/apple/doh.mobileconfig", nil)
 		require.NoError(t, err)
@@ -137,7 +145,11 @@ func TestHandleMobileConfigDoT(t *testing.T) {
 		oldTLSConf := Context.tls
 		t.Cleanup(func() { Context.tls = oldTLSConf })

-		Context.tls = &tlsManager{conf: tlsConfigSettings{}}
+		var err error
+		Context.tls, err = newTLSManager(&tlsConfiguration{
+			Enabled: true,
+		})
+		require.NoError(t, err)

 		r, err := http.NewRequest(http.MethodGet, "https://example.com:12345/apple/dot.mobileconfig", nil)
 		require.NoError(t, err)
--- a/internal/home/options.go
+++ b/internal/home/options.go
@@ -47,6 +47,9 @@ type options struct {
 	// disableUpdate, if set, makes AdGuard Home not check for updates.
 	disableUpdate bool

+	// performUpdate, if set, updates AdGuard Home without GUI and exits.
+	performUpdate bool
+
 	// verbose shows if verbose logging is enabled.
 	verbose bool

@@ -221,6 +224,14 @@ var cmdLineOpts = []cmdLineOpt{{
 	description:     "Don't check for updates.",
 	longName:        "no-check-update",
 	shortName:       "",
+}, {
+	updateWithValue: nil,
+	updateNoValue:   func(o options) (options, error) { o.performUpdate = true; return o, nil },
+	effect:          nil,
+	serialize:       func(o options) (val string, ok bool) { return "", o.performUpdate },
+	description:     "Update application and exit.",
+	longName:        "update",
+	shortName:       "",
 }, {
 	updateWithValue: nil,
 	updateNoValue:   nil,
--- a/internal/home/options_test.go
+++ b/internal/home/options_test.go
@@ -103,6 +103,11 @@ func TestParseDisableUpdate(t *testing.T) {
 	assert.True(t, testParseOK(t, "--no-check-update").disableUpdate, "--no-check-update is disable update")
 }

+func TestParsePerformUpdate(t *testing.T) {
+	assert.False(t, testParseOK(t).performUpdate, "empty is not perform update")
+	assert.True(t, testParseOK(t, "--update").performUpdate, "--update is perform update")
+}
+
 // TODO(e.burkov):  Remove after v0.108.0.
 func TestParseDisableMemoryOptimization(t *testing.T) {
 	o, eff, err := parseCmdOpts("", []string{"--no-mem-optimization"})
@@ -169,6 +174,10 @@ func TestOptsToArgs(t *testing.T) {
 		name: "disable_update",
 		args: []string{"--no-check-update"},
 		opts: options{disableUpdate: true},
+	}, {
+		name: "perform_update",
+		args: []string{"--update"},
+		opts: options{performUpdate: true},
 	}, {
 		name: "control_action",
 		args: []string{"-s", "run"},
--- a/internal/home/rdns.go
+++ b/internal/home/rdns.go
@@ -2,7 +2,7 @@ package home

 import (
 	"encoding/binary"
-	"net"
+	"net/netip"
 	"sync/atomic"
 	"time"

@@ -21,7 +21,7 @@ type RDNS struct {
 	usePrivate uint32

 	// ipCh used to pass client's IP to rDNS workerLoop.
-	ipCh chan net.IP
+	ipCh chan netip.Addr

 	// ipCache caches the IP addresses to be resolved by rDNS.  The resolved
 	// address stays here while it's inside clients.  After leaving clients the
@@ -50,7 +50,7 @@ func NewRDNS(
 			EnableLRU: true,
 			MaxCount:  defaultRDNSCacheSize,
 		}),
-		ipCh: make(chan net.IP, defaultRDNSIPChSize),
+		ipCh: make(chan netip.Addr, defaultRDNSIPChSize),
 	}
 	if usePrivate {
 		rDNS.usePrivate = 1
@@ -80,9 +80,10 @@ func (r *RDNS) ensurePrivateCache() {

 // isCached returns true if ip is already cached and not expired yet.  It also
 // caches it otherwise.
-func (r *RDNS) isCached(ip net.IP) (ok bool) {
+func (r *RDNS) isCached(ip netip.Addr) (ok bool) {
+	ipBytes := ip.AsSlice()
 	now := uint64(time.Now().Unix())
-	if expire := r.ipCache.Get(ip); len(expire) != 0 {
+	if expire := r.ipCache.Get(ipBytes); len(expire) != 0 {
 		if binary.BigEndian.Uint64(expire) > now {
 			return true
 		}
@@ -91,14 +92,14 @@ func (r *RDNS) isCached(ip net.IP) (ok bool) {
 	// The cache entry either expired or doesn't exist.
 	ttl := make([]byte, 8)
 	binary.BigEndian.PutUint64(ttl, now+defaultRDNSCacheTTL)
-	r.ipCache.Set(ip, ttl)
+	r.ipCache.Set(ipBytes, ttl)

 	return false
 }

 // Begin adds the ip to the resolving queue if it is not cached or already
 // resolved.
-func (r *RDNS) Begin(ip net.IP) {
+func (r *RDNS) Begin(ip netip.Addr) {
 	r.ensurePrivateCache()

 	if r.isCached(ip) || r.clients.exists(ip, ClientSourceRDNS) {
@@ -107,9 +108,9 @@ func (r *RDNS) Begin(ip net.IP) {

 	select {
 	case r.ipCh <- ip:
-		log.Tracef("rdns: %q added to queue", ip)
+		log.Debug("rdns: %q added to queue", ip)
 	default:
-		log.Tracef("rdns: queue is full")
+		log.Debug("rdns: queue is full")
 	}
 }

@@ -119,7 +120,7 @@ func (r *RDNS) workerLoop() {
 	defer log.OnPanic("rdns")

 	for ip := range r.ipCh {
-		host, err := r.exchanger.Exchange(ip)
+		host, err := r.exchanger.Exchange(ip.AsSlice())
 		if err != nil {
 			log.Debug("rdns: resolving %q: %s", ip, err)

@@ -128,8 +129,6 @@ func (r *RDNS) workerLoop() {
 			continue
 		}

-		// Don't handle any errors since AddHost doesn't return non-nil errors
-		// for now.
-		_, _ = r.clients.AddHost(ip, host, ClientSourceRDNS)
+		_ = r.clients.AddHost(ip, host, ClientSourceRDNS)
 	}
 }
--- a/internal/home/rdns_test.go
+++ b/internal/home/rdns_test.go
@@ -27,14 +27,14 @@ func TestRDNS_Begin(t *testing.T) {
 	w := &bytes.Buffer{}
 	aghtest.ReplaceLogWriter(t, w)

-	ip1234, ip1235 := net.IP{1, 2, 3, 4}, net.IP{1, 2, 3, 5}
+	ip1234, ip1235 := netip.MustParseAddr("1.2.3.4"), netip.MustParseAddr("1.2.3.5")

 	testCases := []struct {
 		cliIDIndex    map[string]*Client
-		customChan    chan net.IP
+		customChan    chan netip.Addr
 		name          string
 		wantLog       string
-		req           net.IP
+		ip            netip.Addr
 		wantCacheHit  int
 		wantCacheMiss int
 	}{{
@@ -42,7 +42,7 @@ func TestRDNS_Begin(t *testing.T) {
 		customChan:    nil,
 		name:          "cached",
 		wantLog:       "",
-		req:           ip1234,
+		ip:            ip1234,
 		wantCacheHit:  1,
 		wantCacheMiss: 0,
 	}, {
@@ -50,7 +50,7 @@ func TestRDNS_Begin(t *testing.T) {
 		customChan:    nil,
 		name:          "not_cached",
 		wantLog:       "rdns: queue is full",
-		req:           ip1235,
+		ip:            ip1235,
 		wantCacheHit:  0,
 		wantCacheMiss: 1,
 	}, {
@@ -58,15 +58,15 @@ func TestRDNS_Begin(t *testing.T) {
 		customChan:    nil,
 		name:          "already_in_clients",
 		wantLog:       "",
-		req:           ip1235,
+		ip:            ip1235,
 		wantCacheHit:  0,
 		wantCacheMiss: 1,
 	}, {
 		cliIDIndex:    map[string]*Client{},
-		customChan:    make(chan net.IP, 1),
+		customChan:    make(chan netip.Addr, 1),
 		name:          "add_to_queue",
 		wantLog:       `rdns: "1.2.3.5" added to queue`,
-		req:           ip1235,
+		ip:            ip1235,
 		wantCacheHit:  0,
 		wantCacheMiss: 1,
 	}}
@@ -102,7 +102,7 @@ func TestRDNS_Begin(t *testing.T) {
 		}

 		t.Run(tc.name, func(t *testing.T) {
-			rdns.Begin(tc.req)
+			rdns.Begin(tc.ip)
 			assert.Equal(t, tc.wantCacheHit, ipCache.Stats().Hit)
 			assert.Equal(t, tc.wantCacheMiss, ipCache.Stats().Miss)
 			assert.Contains(t, w.String(), tc.wantLog)
@@ -179,8 +179,8 @@ func TestRDNS_WorkerLoop(t *testing.T) {
 	w := &bytes.Buffer{}
 	aghtest.ReplaceLogWriter(t, w)

-	localIP := net.IP{192, 168, 1, 1}
-	revIPv4, err := netutil.IPToReversedAddr(localIP)
+	localIP := netip.MustParseAddr("192.168.1.1")
+	revIPv4, err := netutil.IPToReversedAddr(localIP.AsSlice())
 	require.NoError(t, err)

 	revIPv6, err := netutil.IPToReversedAddr(net.ParseIP("2a00:1450:400c:c06::93"))
@@ -201,24 +201,24 @@ func TestRDNS_WorkerLoop(t *testing.T) {

 	testCases := []struct {
 		ups     upstream.Upstream
+		cliIP   netip.Addr
 		wantLog string
 		name    string
-		cliIP   net.IP
 	}{{
 		ups:     locUpstream,
+		cliIP:   localIP,
 		wantLog: "",
 		name:    "all_good",
-		cliIP:   localIP,
 	}, {
 		ups:     errUpstream,
+		cliIP:   netip.MustParseAddr("192.168.1.2"),
 		wantLog: `rdns: resolving "192.168.1.2": test upstream error`,
 		name:    "resolve_error",
-		cliIP:   net.IP{192, 168, 1, 2},
 	}, {
 		ups:     locUpstream,
+		cliIP:   netip.MustParseAddr("2a00:1450:400c:c06::93"),
 		wantLog: "",
 		name:    "ipv6_good",
-		cliIP:   net.ParseIP("2a00:1450:400c:c06::93"),
 	}}

 	for _, tc := range testCases {
@@ -230,7 +230,7 @@ func TestRDNS_WorkerLoop(t *testing.T) {
 			ipToRC:  map[netip.Addr]*RuntimeClient{},
 			allTags: stringutil.NewSet(),
 		}
-		ch := make(chan net.IP)
+		ch := make(chan netip.Addr)
 		rdns := &RDNS{
 			exchanger: &rDNSExchanger{
 				ex: tc.ups,
--- a/internal/home/tls.go
+++ b/internal/home/tls.go
@@ -8,42 +8,39 @@ import (
 	"crypto/rsa"
 	"crypto/tls"
 	"crypto/x509"
-	"encoding/base64"
-	"encoding/json"
 	"encoding/pem"
 	"fmt"
-	"net/http"
 	"os"
 	"strings"
 	"sync"
 	"time"

-	"github.com/AdguardTeam/AdGuardHome/internal/aghalg"
-	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghtls"
-	"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
 	"github.com/AdguardTeam/golibs/errors"
 	"github.com/AdguardTeam/golibs/log"
-	"github.com/google/go-cmp/cmp"
 )

 // tlsManager contains the current configuration and state of AdGuard Home TLS
 // encryption.
 type tlsManager struct {
-	// status is the current status of the configuration.  It is never nil.
-	status *tlsConfigStatus
+	// mu protects all fields.
+	mu *sync.RWMutex

 	// certLastMod is the last modification time of the certificate file.
 	certLastMod time.Time

-	confLock sync.Mutex
-	conf     tlsConfigSettings
+	// status is the current status of the configuration.  It is never nil.
+	status *tlsConfigStatus
+
+	// conf is the current TLS configuration.
+	conf *tlsConfiguration
 }

 // newTLSManager initializes the TLS configuration.
-func newTLSManager(conf tlsConfigSettings) (m *tlsManager, err error) {
+func newTLSManager(conf *tlsConfiguration) (m *tlsManager, err error) {
 	m = &tlsManager{
 		status: &tlsConfigStatus{},
+		mu:     &sync.RWMutex{},
 		conf:   conf,
 	}

@@ -59,9 +56,19 @@ func newTLSManager(conf tlsConfigSettings) (m *tlsManager, err error) {
 	return m, nil
 }

+// confForEncoding returns a partial clone of the current TLS configuration.  It
+// is safe for concurrent use.
+func (m *tlsManager) confForEncoding() (conf *tlsConfiguration) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	return m.conf.cloneForEncoding()
+}
+
 // load reloads the TLS configuration from files or data from the config file.
+// m.mu is expected to be locked for writing.
 func (m *tlsManager) load() (err error) {
-	err = loadTLSConf(&m.conf, m.status)
+	err = loadTLSConf(m.conf, m.status)
 	if err != nil {
 		return fmt.Errorf("loading config: %w", err)
 	}
@@ -70,14 +77,12 @@ func (m *tlsManager) load() (err error) {
 }

 // WriteDiskConfig - write config
-func (m *tlsManager) WriteDiskConfig(conf *tlsConfigSettings) {
-	m.confLock.Lock()
-	*conf = m.conf
-	m.confLock.Unlock()
+func (m *tlsManager) WriteDiskConfig(conf *tlsConfiguration) {
+	*conf = *m.confForEncoding()
 }

 // setCertFileTime sets t.certLastMod from the certificate.  If there are
-// errors, setCertFileTime logs them.
+// errors, setCertFileTime logs them.  mu is expected to be locked for writing.
 func (m *tlsManager) setCertFileTime() {
 	if len(m.conf.CertificatePath) == 0 {
 		return
@@ -97,27 +102,22 @@ func (m *tlsManager) setCertFileTime() {
 func (m *tlsManager) start() {
 	m.registerWebHandlers()

-	m.confLock.Lock()
-	tlsConf := m.conf
-	m.confLock.Unlock()
-
 	// The background context is used because the TLSConfigChanged wraps context
 	// with timeout on its own and shuts down the server, which handles current
 	// request.
-	Context.web.TLSConfigChanged(context.Background(), tlsConf)
+	Context.web.TLSConfigChanged(context.Background(), m.confForEncoding())
 }

-// reload updates the configuration and restarts t.
+// reload updates the configuration and restarts m.
 func (m *tlsManager) reload() {
-	m.confLock.Lock()
-	tlsConf := m.conf
-	m.confLock.Unlock()
+	m.mu.Lock()
+	defer m.mu.Unlock()

-	if !tlsConf.Enabled || len(tlsConf.CertificatePath) == 0 {
+	if !m.conf.Enabled || len(m.conf.CertificatePath) == 0 {
 		return
 	}

-	fi, err := os.Stat(tlsConf.CertificatePath)
+	fi, err := os.Stat(m.conf.CertificatePath)
 	if err != nil {
 		log.Error("tls: %s", err)

@@ -132,9 +132,7 @@ func (m *tlsManager) reload() {

 	log.Debug("tls: certificate file is modified")

-	m.confLock.Lock()
 	err = m.load()
-	m.confLock.Unlock()
 	if err != nil {
 		log.Error("tls: reloading: %s", err)

@@ -145,19 +143,15 @@ func (m *tlsManager) reload() {

 	_ = reconfigureDNSServer()

-	m.confLock.Lock()
-	tlsConf = m.conf
-	m.confLock.Unlock()
-
 	// The background context is used because the TLSConfigChanged wraps context
 	// with timeout on its own and shuts down the server, which handles current
 	// request.
-	Context.web.TLSConfigChanged(context.Background(), tlsConf)
+	Context.web.TLSConfigChanged(context.Background(), m.conf)
 }

 // loadTLSConf loads and validates the TLS configuration.  The returned error is
 // also set in status.WarningValidation.
-func loadTLSConf(tlsConf *tlsConfigSettings, status *tlsConfigStatus) (err error) {
+func loadTLSConf(tlsConf *tlsConfiguration, status *tlsConfigStatus) (err error) {
 	defer func() {
 		if err != nil {
 			status.WarningValidation = err.Error()
@@ -172,13 +166,10 @@ func loadTLSConf(tlsConf *tlsConfigSettings, status *tlsConfigStatus) (err error
 	tlsConf.PrivateKeyData = []byte(tlsConf.PrivateKey)

 	if tlsConf.CertificatePath != "" {
-		if tlsConf.CertificateChain != "" {
-			return errors.Error("certificate data and file can't be set together")
-		}
-
-		tlsConf.CertificateChainData, err = os.ReadFile(tlsConf.CertificatePath)
+		err = loadCert(tlsConf)
 		if err != nil {
-			return fmt.Errorf("reading cert file: %w", err)
+			// Don't wrap the error, since it's informative enough as is.
+			return err
 		}

 		// Set status.ValidCert to true to signal the frontend that the
@@ -187,13 +178,10 @@ func loadTLSConf(tlsConf *tlsConfigSettings, status *tlsConfigStatus) (err error
 	}

 	if tlsConf.PrivateKeyPath != "" {
-		if tlsConf.PrivateKey != "" {
-			return errors.Error("private key data and file can't be set together")
-		}
-
-		tlsConf.PrivateKeyData, err = os.ReadFile(tlsConf.PrivateKeyPath)
+		err = loadPKey(tlsConf)
 		if err != nil {
-			return fmt.Errorf("reading key file: %w", err)
+			// Don't wrap the error, since it's informative enough as is.
+			return err
 		}

 		status.ValidKey = true
@@ -212,278 +200,29 @@ func loadTLSConf(tlsConf *tlsConfigSettings, status *tlsConfigStatus) (err error
 	return nil
 }

-// tlsConfigStatus contains the status of a certificate chain and key pair.
-type tlsConfigStatus struct {
-	// Subject is the subject of the first certificate in the chain.
-	Subject string `json:"subject,omitempty"`
-
-	// Issuer is the issuer of the first certificate in the chain.
-	Issuer string `json:"issuer,omitempty"`
-
-	// KeyType is the type of the private key.
-	KeyType string `json:"key_type,omitempty"`
-
-	// NotBefore is the NotBefore field of the first certificate in the chain.
-	NotBefore time.Time `json:"not_before,omitempty"`
-
-	// NotAfter is the NotAfter field of the first certificate in the chain.
-	NotAfter time.Time `json:"not_after,omitempty"`
-
-	// WarningValidation is a validation warning message with the issue
-	// description.
-	WarningValidation string `json:"warning_validation,omitempty"`
-
-	// DNSNames is the value of SubjectAltNames field of the first certificate
-	// in the chain.
-	DNSNames []string `json:"dns_names"`
-
-	// ValidCert is true if the specified certificate chain is a valid chain of
-	// X509 certificates.
-	ValidCert bool `json:"valid_cert"`
-
-	// ValidChain is true if the specified certificate chain is verified and
-	// issued by a known CA.
-	ValidChain bool `json:"valid_chain"`
-
-	// ValidKey is true if the key is a valid private key.
-	ValidKey bool `json:"valid_key"`
-
-	// ValidPair is true if both certificate and private key are correct for
-	// each other.
-	ValidPair bool `json:"valid_pair"`
-}
-
-// tlsConfig is the TLS configuration and status response.
-type tlsConfig struct {
-	*tlsConfigStatus     `json:",inline"`
-	tlsConfigSettingsExt `json:",inline"`
-}
-
-// tlsConfigSettingsExt is used to (un)marshal the PrivateKeySaved field to
-// ensure that clients don't send and receive previously saved private keys.
-type tlsConfigSettingsExt struct {
-	tlsConfigSettings `json:",inline"`
-
-	// PrivateKeySaved is true if the private key is saved as a string and omit
-	// key from answer.
-	PrivateKeySaved bool `yaml:"-" json:"private_key_saved,inline"`
-}
-
-func (m *tlsManager) handleTLSStatus(w http.ResponseWriter, r *http.Request) {
-	m.confLock.Lock()
-	data := tlsConfig{
-		tlsConfigSettingsExt: tlsConfigSettingsExt{
-			tlsConfigSettings: m.conf,
-		},
-		tlsConfigStatus: m.status,
+// loadCert loads the certificate from file, if necessary.
+func loadCert(tlsConf *tlsConfiguration) (err error) {
+	if tlsConf.CertificateChain != "" {
+		return errors.Error("certificate data and file can't be set together")
 	}
-	m.confLock.Unlock()

-	marshalTLS(w, r, data)
-}
-
-func (m *tlsManager) handleTLSValidate(w http.ResponseWriter, r *http.Request) {
-	setts, err := unmarshalTLS(r)
+	tlsConf.CertificateChainData, err = os.ReadFile(tlsConf.CertificatePath)
 	if err != nil {
-		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
-
-		return
+		return fmt.Errorf("reading cert file: %w", err)
 	}

-	if setts.PrivateKeySaved {
-		setts.PrivateKey = m.conf.PrivateKey
-	}
-
-	if setts.Enabled {
-		err = validatePorts(
-			tcpPort(config.BindPort),
-			tcpPort(config.BetaBindPort),
-			tcpPort(setts.PortHTTPS),
-			tcpPort(setts.PortDNSOverTLS),
-			tcpPort(setts.PortDNSCrypt),
-			udpPort(config.DNS.Port),
-			udpPort(setts.PortDNSOverQUIC),
-		)
-		if err != nil {
-			aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
-
-			return
-		}
-	}
-
-	if !webCheckPortAvailable(setts.PortHTTPS) {
-		aghhttp.Error(
-			r,
-			w,
-			http.StatusBadRequest,
-			"port %d is not available, cannot enable HTTPS on it",
-			setts.PortHTTPS,
-		)
-
-		return
-	}
-
-	// Skip the error check, since we are only interested in the value of
-	// status.WarningValidation.
-	status := &tlsConfigStatus{}
-	_ = loadTLSConf(&setts.tlsConfigSettings, status)
-	resp := tlsConfig{
-		tlsConfigSettingsExt: setts,
-		tlsConfigStatus:      status,
-	}
-
-	marshalTLS(w, r, resp)
+	return nil
 }

-func (m *tlsManager) setConfig(newConf tlsConfigSettings, status *tlsConfigStatus) (restartHTTPS bool) {
-	m.confLock.Lock()
-	defer m.confLock.Unlock()
-
-	// Reset the DNSCrypt data before comparing, since we currently do not
-	// accept these from the frontend.
-	//
-	// TODO(a.garipov): Define a custom comparer for dnsforward.TLSConfig.
-	newConf.DNSCryptConfigFile = m.conf.DNSCryptConfigFile
-	newConf.PortDNSCrypt = m.conf.PortDNSCrypt
-	if !cmp.Equal(m.conf, newConf, cmp.AllowUnexported(dnsforward.TLSConfig{})) {
-		log.Info("tls config has changed, restarting https server")
-		restartHTTPS = true
-	} else {
-		log.Info("tls: config has not changed")
+// loadPKey loads the private key from file, if necessary.
+func loadPKey(tlsConf *tlsConfiguration) (err error) {
+	if tlsConf.PrivateKey != "" {
+		return errors.Error("private key data and file cannot be set together")
 	}

-	// Note: don't do just `t.conf = data` because we must preserve all other members of t.conf
-	m.conf.Enabled = newConf.Enabled
-	m.conf.ServerName = newConf.ServerName
-	m.conf.ForceHTTPS = newConf.ForceHTTPS
-	m.conf.PortHTTPS = newConf.PortHTTPS
-	m.conf.PortDNSOverTLS = newConf.PortDNSOverTLS
-	m.conf.PortDNSOverQUIC = newConf.PortDNSOverQUIC
-	m.conf.CertificateChain = newConf.CertificateChain
-	m.conf.CertificatePath = newConf.CertificatePath
-	m.conf.CertificateChainData = newConf.CertificateChainData
-	m.conf.PrivateKey = newConf.PrivateKey
-	m.conf.PrivateKeyPath = newConf.PrivateKeyPath
-	m.conf.PrivateKeyData = newConf.PrivateKeyData
-	m.status = status
-
-	return restartHTTPS
-}
-
-func (m *tlsManager) handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
-	req, err := unmarshalTLS(r)
+	tlsConf.PrivateKeyData, err = os.ReadFile(tlsConf.PrivateKeyPath)
 	if err != nil {
-		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
-
-		return
-	}
-
-	if req.PrivateKeySaved {
-		req.PrivateKey = m.conf.PrivateKey
-	}
-
-	if req.Enabled {
-		err = validatePorts(
-			tcpPort(config.BindPort),
-			tcpPort(config.BetaBindPort),
-			tcpPort(req.PortHTTPS),
-			tcpPort(req.PortDNSOverTLS),
-			tcpPort(req.PortDNSCrypt),
-			udpPort(config.DNS.Port),
-			udpPort(req.PortDNSOverQUIC),
-		)
-		if err != nil {
-			aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
-
-			return
-		}
-	}
-
-	// TODO(e.burkov):  Investigate and perhaps check other ports.
-	if !webCheckPortAvailable(req.PortHTTPS) {
-		aghhttp.Error(
-			r,
-			w,
-			http.StatusBadRequest,
-			"port %d is not available, cannot enable https on it",
-			req.PortHTTPS,
-		)
-
-		return
-	}
-
-	status := &tlsConfigStatus{}
-	err = loadTLSConf(&req.tlsConfigSettings, status)
-	if err != nil {
-		resp := tlsConfig{
-			tlsConfigSettingsExt: req,
-			tlsConfigStatus:      status,
-		}
-
-		marshalTLS(w, r, resp)
-
-		return
-	}
-
-	restartHTTPS := m.setConfig(req.tlsConfigSettings, status)
-	m.setCertFileTime()
-	onConfigModified()
-
-	err = reconfigureDNSServer()
-	if err != nil {
-		aghhttp.Error(r, w, http.StatusInternalServerError, "%s", err)
-
-		return
-	}
-
-	resp := tlsConfig{
-		tlsConfigSettingsExt: req,
-		tlsConfigStatus:      m.status,
-	}
-
-	marshalTLS(w, r, resp)
-	if f, ok := w.(http.Flusher); ok {
-		f.Flush()
-	}
-
-	// The background context is used because the TLSConfigChanged wraps context
-	// with timeout on its own and shuts down the server, which handles current
-	// request. It is also should be done in a separate goroutine due to the
-	// same reason.
-	if restartHTTPS {
-		go func() {
-			Context.web.TLSConfigChanged(context.Background(), req.tlsConfigSettings)
-		}()
-	}
-}
-
-// validatePorts validates the uniqueness of TCP and UDP ports for AdGuard Home
-// DNS protocols.
-func validatePorts(
-	bindPort, betaBindPort, dohPort, dotPort, dnscryptTCPPort tcpPort,
-	dnsPort, doqPort udpPort,
-) (err error) {
-	tcpPorts := aghalg.UniqChecker[tcpPort]{}
-	addPorts(
-		tcpPorts,
-		tcpPort(bindPort),
-		tcpPort(betaBindPort),
-		tcpPort(dohPort),
-		tcpPort(dotPort),
-		tcpPort(dnscryptTCPPort),
-	)
-
-	err = tcpPorts.Validate()
-	if err != nil {
-		return fmt.Errorf("validating tcp ports: %w", err)
-	}
-
-	udpPorts := aghalg.UniqChecker[udpPort]{}
-	addPorts(udpPorts, udpPort(dnsPort), udpPort(doqPort))
-
-	err = udpPorts.Validate()
-	if err != nil {
-		return fmt.Errorf("validating udp ports: %w", err)
+		return fmt.Errorf("reading key file: %w", err)
 	}

 	return nil
@@ -513,6 +252,11 @@ func validateCertChain(certs []*x509.Certificate, srvName string) (err error) {
 	return nil
 }

+// errNoIPInCert is the error that is returned from [parseCertChain] if the leaf
+// certificate doesn't contain IPs.
+const errNoIPInCert errors.Error = `certificates has no IP addresses; ` +
+	`DNS-over-TLS won't be advertised via DDR`
+
 // parseCertChain parses the certificate chain from raw data, and returns it.
 // If ok is true, the returned error, if any, is not critical.
 func parseCertChain(chain []byte) (parsedCerts []*x509.Certificate, ok bool, err error) {
@@ -535,8 +279,7 @@ func parseCertChain(chain []byte) (parsedCerts []*x509.Certificate, ok bool, err
 	log.Info("tls: number of certs: %d", len(parsedCerts))

 	if !aghtls.CertificateHasIP(parsedCerts[0]) {
-		err = errors.Error(`certificate has no IP addresses` +
-			`, this may cause issues with DNS-over-TLS clients`)
+		err = errNoIPInCert
 	}

 	return parsedCerts, true, err
@@ -696,61 +439,3 @@ func parsePrivateKey(der []byte) (key crypto.PrivateKey, typ string, err error)

 	return nil, "", errors.Error("tls: failed to parse private key")
 }
-
-// unmarshalTLS handles base64-encoded certificates transparently
-func unmarshalTLS(r *http.Request) (tlsConfigSettingsExt, error) {
-	data := tlsConfigSettingsExt{}
-	err := json.NewDecoder(r.Body).Decode(&data)
-	if err != nil {
-		return data, fmt.Errorf("failed to parse new TLS config json: %w", err)
-	}
-
-	if data.CertificateChain != "" {
-		var cert []byte
-		cert, err = base64.StdEncoding.DecodeString(data.CertificateChain)
-		if err != nil {
-			return data, fmt.Errorf("failed to base64-decode certificate chain: %w", err)
-		}
-
-		data.CertificateChain = string(cert)
-		if data.CertificatePath != "" {
-			return data, fmt.Errorf("certificate data and file can't be set together")
-		}
-	}
-
-	if data.PrivateKey != "" {
-		var key []byte
-		key, err = base64.StdEncoding.DecodeString(data.PrivateKey)
-		if err != nil {
-			return data, fmt.Errorf("failed to base64-decode private key: %w", err)
-		}
-
-		data.PrivateKey = string(key)
-		if data.PrivateKeyPath != "" {
-			return data, fmt.Errorf("private key data and file can't be set together")
-		}
-	}
-
-	return data, nil
-}
-
-func marshalTLS(w http.ResponseWriter, r *http.Request, data tlsConfig) {
-	if data.CertificateChain != "" {
-		encoded := base64.StdEncoding.EncodeToString([]byte(data.CertificateChain))
-		data.CertificateChain = encoded
-	}
-
-	if data.PrivateKey != "" {
-		data.PrivateKeySaved = true
-		data.PrivateKey = ""
-	}
-
-	_ = aghhttp.WriteJSONResponse(w, r, data)
-}
-
-// registerWebHandlers registers HTTP handlers for TLS configuration.
-func (m *tlsManager) registerWebHandlers() {
-	httpRegister(http.MethodGet, "/control/tls/status", m.handleTLSStatus)
-	httpRegister(http.MethodPost, "/control/tls/configure", m.handleTLSConfigure)
-	httpRegister(http.MethodPost, "/control/tls/validate", m.handleTLSValidate)
-}
--- a/internal/home/tlshttp.go
+++ b/internal/home/tlshttp.go
@@ -0,0 +1,362 @@
+package home
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/AdguardTeam/AdGuardHome/internal/aghalg"
+	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
+	"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
+	"github.com/AdguardTeam/golibs/log"
+	"github.com/google/go-cmp/cmp"
+)
+
+// Encryption Settings HTTP API
+
+// tlsConfigStatus contains the status of a certificate chain and key pair.
+type tlsConfigStatus struct {
+	// Subject is the subject of the first certificate in the chain.
+	Subject string `json:"subject,omitempty"`
+
+	// Issuer is the issuer of the first certificate in the chain.
+	Issuer string `json:"issuer,omitempty"`
+
+	// KeyType is the type of the private key.
+	KeyType string `json:"key_type,omitempty"`
+
+	// NotBefore is the NotBefore field of the first certificate in the chain.
+	NotBefore time.Time `json:"not_before,omitempty"`
+
+	// NotAfter is the NotAfter field of the first certificate in the chain.
+	NotAfter time.Time `json:"not_after,omitempty"`
+
+	// WarningValidation is a validation warning message with the issue
+	// description.
+	WarningValidation string `json:"warning_validation,omitempty"`
+
+	// DNSNames is the value of SubjectAltNames field of the first certificate
+	// in the chain.
+	DNSNames []string `json:"dns_names"`
+
+	// ValidCert is true if the specified certificate chain is a valid chain of
+	// X509 certificates.
+	ValidCert bool `json:"valid_cert"`
+
+	// ValidChain is true if the specified certificate chain is verified and
+	// issued by a known CA.
+	ValidChain bool `json:"valid_chain"`
+
+	// ValidKey is true if the key is a valid private key.
+	ValidKey bool `json:"valid_key"`
+
+	// ValidPair is true if both certificate and private key are correct for
+	// each other.
+	ValidPair bool `json:"valid_pair"`
+}
+
+// tlsConfigResp is the TLS configuration and status response.
+type tlsConfigResp struct {
+	*tlsConfigStatus
+	*tlsConfiguration
+
+	// PrivateKeySaved is true if the private key is saved as a string and omit
+	// key from answer.
+	PrivateKeySaved bool `yaml:"-" json:"private_key_saved"`
+}
+
+// tlsConfigReq is the TLS configuration request.
+type tlsConfigReq struct {
+	tlsConfiguration
+
+	// PrivateKeySaved is true if the private key is saved as a string and omit
+	// key from answer.
+	PrivateKeySaved bool `yaml:"-" json:"private_key_saved"`
+}
+
+// handleTLSStatus is the handler for the GET /control/tls/status HTTP API.
+func (m *tlsManager) handleTLSStatus(w http.ResponseWriter, r *http.Request) {
+	var resp *tlsConfigResp
+	func() {
+		m.mu.RLock()
+		defer m.mu.RUnlock()
+
+		resp = &tlsConfigResp{
+			tlsConfigStatus:  m.status,
+			tlsConfiguration: m.conf.cloneForEncoding(),
+		}
+	}()
+
+	marshalTLS(w, r, resp)
+}
+
+// handleTLSValidate is the handler for the POST /control/tls/validate HTTP API.
+func (m *tlsManager) handleTLSValidate(w http.ResponseWriter, r *http.Request) {
+	req, err := unmarshalTLS(r)
+	if err != nil {
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
+
+		return
+	}
+
+	if req.PrivateKeySaved {
+		req.PrivateKey = m.confForEncoding().PrivateKey
+	}
+
+	if req.Enabled {
+		err = validatePorts(
+			tcpPort(config.BindPort),
+			tcpPort(config.BetaBindPort),
+			tcpPort(req.PortHTTPS),
+			tcpPort(req.PortDNSOverTLS),
+			tcpPort(req.PortDNSCrypt),
+			udpPort(config.DNS.Port),
+			udpPort(req.PortDNSOverQUIC),
+		)
+		if err != nil {
+			aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
+
+			return
+		}
+	}
+
+	if !webCheckPortAvailable(req.PortHTTPS) {
+		aghhttp.Error(
+			r,
+			w,
+			http.StatusBadRequest,
+			"port %d is not available, cannot enable HTTPS on it",
+			req.PortHTTPS,
+		)
+
+		return
+	}
+
+	resp := &tlsConfigResp{
+		tlsConfigStatus:  &tlsConfigStatus{},
+		tlsConfiguration: &req.tlsConfiguration,
+	}
+
+	// Skip the error check, since we are only interested in the value of
+	// resl.tlsConfigStatus.WarningValidation.
+	_ = loadTLSConf(resp.tlsConfiguration, resp.tlsConfigStatus)
+
+	marshalTLS(w, r, resp)
+}
+
+// validatePorts validates the uniqueness of TCP and UDP ports for AdGuard Home
+// DNS protocols.
+func validatePorts(
+	bindPort, betaBindPort, dohPort, dotPort, dnscryptTCPPort tcpPort,
+	dnsPort, doqPort udpPort,
+) (err error) {
+	tcpPorts := aghalg.UniqChecker[tcpPort]{}
+	addPorts(
+		tcpPorts,
+		tcpPort(bindPort),
+		tcpPort(betaBindPort),
+		tcpPort(dohPort),
+		tcpPort(dotPort),
+		tcpPort(dnscryptTCPPort),
+	)
+
+	err = tcpPorts.Validate()
+	if err != nil {
+		return fmt.Errorf("validating tcp ports: %w", err)
+	}
+
+	udpPorts := aghalg.UniqChecker[udpPort]{}
+	addPorts(udpPorts, udpPort(dnsPort), udpPort(doqPort))
+
+	err = udpPorts.Validate()
+	if err != nil {
+		return fmt.Errorf("validating udp ports: %w", err)
+	}
+
+	return nil
+}
+
+// handleTLSConfigure is the handler for the POST /control/tls/configure HTTP
+// API.
+func (m *tlsManager) handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
+	req, err := unmarshalTLS(r)
+	if err != nil {
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
+
+		return
+	}
+
+	if req.PrivateKeySaved {
+		req.PrivateKey = m.confForEncoding().PrivateKey
+	}
+
+	if req.Enabled {
+		err = validatePorts(
+			tcpPort(config.BindPort),
+			tcpPort(config.BetaBindPort),
+			tcpPort(req.PortHTTPS),
+			tcpPort(req.PortDNSOverTLS),
+			tcpPort(req.PortDNSCrypt),
+			udpPort(config.DNS.Port),
+			udpPort(req.PortDNSOverQUIC),
+		)
+		if err != nil {
+			aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
+
+			return
+		}
+	}
+
+	// TODO(e.burkov):  Investigate and perhaps check other ports.
+	if !webCheckPortAvailable(req.PortHTTPS) {
+		aghhttp.Error(
+			r,
+			w,
+			http.StatusBadRequest,
+			"port %d is not available, cannot enable https on it",
+			req.PortHTTPS,
+		)
+
+		return
+	}
+
+	resp := &tlsConfigResp{
+		tlsConfigStatus:  &tlsConfigStatus{},
+		tlsConfiguration: &req.tlsConfiguration,
+	}
+	err = loadTLSConf(resp.tlsConfiguration, resp.tlsConfigStatus)
+	if err != nil {
+		marshalTLS(w, r, resp)
+
+		return
+	}
+
+	restartRequired := m.setConf(resp)
+	onConfigModified()
+
+	err = reconfigureDNSServer()
+	if err != nil {
+		aghhttp.Error(r, w, http.StatusInternalServerError, "%s", err)
+
+		return
+	}
+
+	resp.tlsConfiguration = m.confForEncoding()
+	marshalTLS(w, r, resp)
+	if f, ok := w.(http.Flusher); ok {
+		f.Flush()
+	}
+
+	// The background context is used because the TLSConfigChanged wraps context
+	// with timeout on its own and shuts down the server, which handles current
+	// request. It is also should be done in a separate goroutine due to the
+	// same reason.
+	if restartRequired {
+		go func() {
+			Context.web.TLSConfigChanged(context.Background(), resp.tlsConfiguration)
+		}()
+	}
+}
+
+// setConf sets the necessary values from the new configuration.
+func (m *tlsManager) setConf(newConf *tlsConfigResp) (restartRequired bool) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	// Reset the DNSCrypt data before comparing, since we currently do not
+	// accept these from the frontend.
+	//
+	// TODO(a.garipov): Define a custom comparer for dnsforward.TLSConfig.
+	newConf.DNSCryptConfigFile = m.conf.DNSCryptConfigFile
+	newConf.PortDNSCrypt = m.conf.PortDNSCrypt
+	if !cmp.Equal(m.conf, newConf, cmp.AllowUnexported(dnsforward.TLSConfig{})) {
+		log.Info("tls: config has changed, restarting https server")
+		restartRequired = true
+	} else {
+		log.Info("tls: config has not changed")
+	}
+
+	// Do not just write "m.conf = *newConf.tlsConfiguration", because all other
+	// members of m.conf must be preserved.
+	m.conf.Enabled = newConf.Enabled
+	m.conf.ServerName = newConf.ServerName
+	m.conf.ForceHTTPS = newConf.ForceHTTPS
+	m.conf.PortHTTPS = newConf.PortHTTPS
+	m.conf.PortDNSOverTLS = newConf.PortDNSOverTLS
+	m.conf.PortDNSOverQUIC = newConf.PortDNSOverQUIC
+
+	m.conf.CertificateChain = newConf.CertificateChain
+	m.conf.CertificatePath = newConf.CertificatePath
+	m.conf.CertificateChainData = newConf.CertificateChainData
+	m.conf.PrivateKey = newConf.PrivateKey
+	m.conf.PrivateKeyPath = newConf.PrivateKeyPath
+	m.conf.PrivateKeyData = newConf.PrivateKeyData
+
+	m.setCertFileTime()
+
+	m.status = newConf.tlsConfigStatus
+
+	return restartRequired
+}
+
+// marshalTLS handles Base64-encoded certificates transparently.
+func marshalTLS(w http.ResponseWriter, r *http.Request, conf *tlsConfigResp) {
+	if conf.CertificateChain != "" {
+		encoded := base64.StdEncoding.EncodeToString([]byte(conf.CertificateChain))
+		conf.CertificateChain = encoded
+	}
+
+	if conf.PrivateKey != "" {
+		conf.PrivateKeySaved = true
+		conf.PrivateKey = ""
+	}
+
+	_ = aghhttp.WriteJSONResponse(w, r, conf)
+}
+
+// unmarshalTLS handles Base64-encoded certificates transparently.
+func unmarshalTLS(r *http.Request) (req *tlsConfigReq, err error) {
+	req = &tlsConfigReq{}
+	err = json.NewDecoder(r.Body).Decode(req)
+	if err != nil {
+		return nil, fmt.Errorf("parsing tls config: %w", err)
+	}
+
+	if req.CertificateChain != "" {
+		var cert []byte
+		cert, err = base64.StdEncoding.DecodeString(req.CertificateChain)
+		if err != nil {
+			return nil, fmt.Errorf("failed to base64-decode certificate chain: %w", err)
+		}
+
+		req.CertificateChain = string(cert)
+		if req.CertificatePath != "" {
+			return nil, fmt.Errorf("certificate data and file can't be set together")
+		}
+	}
+
+	if req.PrivateKey != "" {
+		var key []byte
+		key, err = base64.StdEncoding.DecodeString(req.PrivateKey)
+		if err != nil {
+			return nil, fmt.Errorf("failed to base64-decode private key: %w", err)
+		}
+
+		req.PrivateKey = string(key)
+		if req.PrivateKeyPath != "" {
+			return nil, fmt.Errorf("private key data and file can't be set together")
+		}
+	}
+
+	return req, nil
+}
+
+// registerWebHandlers registers HTTP handlers for TLS configuration.
+func (m *tlsManager) registerWebHandlers() {
+	httpRegister(http.MethodGet, "/control/tls/status", m.handleTLSStatus)
+	httpRegister(http.MethodPost, "/control/tls/configure", m.handleTLSConfigure)
+	httpRegister(http.MethodPost, "/control/tls/validate", m.handleTLSValidate)
+}
--- a/internal/home/web.go
+++ b/internal/home/web.go
@@ -143,7 +143,7 @@ func webCheckPortAvailable(port int) (ok bool) {

 // TLSConfigChanged updates the TLS configuration and restarts the HTTPS server
 // if necessary.
-func (web *Web) TLSConfigChanged(ctx context.Context, tlsConf tlsConfigSettings) {
+func (web *Web) TLSConfigChanged(ctx context.Context, tlsConf *tlsConfiguration) {
 	log.Debug("web: applying new tls configuration")
 	web.conf.PortHTTPS = tlsConf.PortHTTPS
 	web.forceHTTPS = (tlsConf.ForceHTTPS && tlsConf.Enabled && tlsConf.PortHTTPS != 0)
--- a/internal/home/whois.go
+++ b/internal/home/whois.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"net/netip"
 	"strings"
 	"time"

@@ -26,7 +27,7 @@ const (
 // WHOIS - module context
 type WHOIS struct {
 	clients *clientsContainer
-	ipChan  chan net.IP
+	ipChan  chan netip.Addr

 	// dialContext specifies the dial function for creating unencrypted TCP
 	// connections.
@@ -51,7 +52,7 @@ func initWHOIS(clients *clientsContainer) *WHOIS {
 			MaxCount:  10000,
 		}),
 		dialContext: customDialContext,
-		ipChan:      make(chan net.IP, 255),
+		ipChan:      make(chan netip.Addr, 255),
 	}

 	go w.workerLoop()
@@ -192,7 +193,7 @@ func (w *WHOIS) queryAll(ctx context.Context, target string) (string, error) {
 }

 // Request WHOIS information
-func (w *WHOIS) process(ctx context.Context, ip net.IP) (wi *RuntimeClientWHOISInfo) {
+func (w *WHOIS) process(ctx context.Context, ip netip.Addr) (wi *RuntimeClientWHOISInfo) {
 	resp, err := w.queryAll(ctx, ip.String())
 	if err != nil {
 		log.Debug("whois: error: %s  IP:%s", err, ip)
@@ -220,24 +221,25 @@ func (w *WHOIS) process(ctx context.Context, ip net.IP) (wi *RuntimeClientWHOISI
 }

 // Begin - begin requesting WHOIS info
-func (w *WHOIS) Begin(ip net.IP) {
+func (w *WHOIS) Begin(ip netip.Addr) {
+	ipBytes := ip.AsSlice()
 	now := uint64(time.Now().Unix())
-	expire := w.ipAddrs.Get([]byte(ip))
+	expire := w.ipAddrs.Get(ipBytes)
 	if len(expire) != 0 {
 		exp := binary.BigEndian.Uint64(expire)
 		if exp > now {
 			return
 		}
-		// TTL expired
 	}
+
 	expire = make([]byte, 8)
 	binary.BigEndian.PutUint64(expire, now+whoisTTL)
-	_ = w.ipAddrs.Set([]byte(ip), expire)
+	_ = w.ipAddrs.Set(ipBytes, expire)

 	log.Debug("whois: adding %s", ip)
+
 	select {
 	case w.ipChan <- ip:
-		//
 	default:
 		log.Debug("whois: queue is full")
 	}
--- a/internal/stats/stats.go
+++ b/internal/stats/stats.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"net/netip"
 	"os"
 	"sync"
 	"sync/atomic"
@@ -64,7 +65,7 @@ type Interface interface {

 	// GetTopClientIP returns at most limit IP addresses corresponding to the
 	// clients with the most number of requests.
-	TopClientsIP(limit uint) []net.IP
+	TopClientsIP(limit uint) []netip.Addr

 	// WriteDiskConfig puts the Interface's configuration to the dc.
 	WriteDiskConfig(dc *DiskConfig)
@@ -107,8 +108,6 @@ type StatsCtx struct {
 	filename string
 }

-var _ Interface = &StatsCtx{}
-
 // New creates s from conf and properly initializes it.  Don't use s before
 // calling it's Start method.
 func New(conf Config) (s *StatsCtx, err error) {
@@ -178,6 +177,9 @@ func withRecovered(orig *error) {
 	*orig = errors.WithDeferred(*orig, err)
 }

+// type check
+var _ Interface = (*StatsCtx)(nil)
+
 // Start implements the Interface interface for *StatsCtx.
 func (s *StatsCtx) Start() {
 	s.initWeb()
@@ -250,8 +252,8 @@ func (s *StatsCtx) WriteDiskConfig(dc *DiskConfig) {
 	dc.Interval = atomic.LoadUint32(&s.limitHours) / 24
 }

-// TopClientsIP implements the Interface interface for *StatsCtx.
-func (s *StatsCtx) TopClientsIP(maxCount uint) (ips []net.IP) {
+// TopClientsIP implements the [Interface] interface for *StatsCtx.
+func (s *StatsCtx) TopClientsIP(maxCount uint) (ips []netip.Addr) {
 	limit := atomic.LoadUint32(&s.limitHours)
 	if limit == 0 {
 		return nil
@@ -271,10 +273,10 @@ func (s *StatsCtx) TopClientsIP(maxCount uint) (ips []net.IP) {
 	}

 	a := convertMapToSlice(m, int(maxCount))
-	ips = []net.IP{}
+	ips = []netip.Addr{}
 	for _, it := range a {
-		ip := net.ParseIP(it.Name)
-		if ip != nil {
+		ip, err := netip.ParseAddr(it.Name)
+		if err == nil {
 			ips = append(ips, ip)
 		}
 	}
--- a/internal/stats/stats_test.go
+++ b/internal/stats/stats_test.go
@@ -11,6 +11,7 @@ import (
 	"testing"

 	"github.com/AdguardTeam/AdGuardHome/internal/stats"
+	"github.com/AdguardTeam/golibs/netutil"
 	"github.com/AdguardTeam/golibs/testutil"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -45,7 +46,7 @@ func assertSuccessAndUnmarshal(t *testing.T, to any, handler http.Handler, req *
 }

 func TestStats(t *testing.T) {
-	cliIP := net.IP{127, 0, 0, 1}
+	cliIP := netutil.IPv4Localhost()
 	cliIPStr := cliIP.String()

 	handlers := map[string]http.Handler{}
@@ -123,7 +124,7 @@ func TestStats(t *testing.T) {
 		topClients := s.TopClientsIP(2)
 		require.NotEmpty(t, topClients)

-		assert.True(t, cliIP.Equal(topClients[0]))
+		assert.Equal(t, cliIP, topClients[0])
 	})

 	t.Run("reset", func(t *testing.T) {
--- a/internal/tools/go.mod
+++ b/internal/tools/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/kyoh86/looppointer v0.1.9
 	github.com/securego/gosec/v2 v2.14.0
 	golang.org/x/tools v0.2.0
-	golang.org/x/vuln v0.0.0-20221025230227-995372c58a16
+	golang.org/x/vuln v0.0.0-20221103225512-4f561ca73b59
 	honnef.co/go/tools v0.3.3
 	mvdan.cc/gofumpt v0.4.0
 	mvdan.cc/unparam v0.0.0-20220926085101-66de63301820
@@ -24,10 +24,10 @@ require (
 	github.com/kyoh86/nolint v0.0.1 // indirect
 	github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
-	golang.org/x/exp v0.0.0-20221031165847-c99f073a8326 // indirect
-	golang.org/x/exp/typeparams v0.0.0-20221031165847-c99f073a8326 // indirect
+	golang.org/x/exp v0.0.0-20221106115401-f9659909a136 // indirect
+	golang.org/x/exp/typeparams v0.0.0-20221106115401-f9659909a136 // indirect
 	golang.org/x/mod v0.6.0 // indirect
 	golang.org/x/sync v0.1.0 // indirect
-	golang.org/x/sys v0.1.0 // indirect
+	golang.org/x/sys v0.2.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
--- a/internal/tools/go.sum
+++ b/internal/tools/go.sum
@@ -53,10 +53,10 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/exp v0.0.0-20221031165847-c99f073a8326 h1:QfTh0HpN6hlw6D3vu8DAwC8pBIwikq0AI1evdm+FksE=
-golang.org/x/exp v0.0.0-20221031165847-c99f073a8326/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
-golang.org/x/exp/typeparams v0.0.0-20221031165847-c99f073a8326 h1:fl8k2zg28yA23264d82M4dp+YlJ3ngDcpuB1bewkQi4=
-golang.org/x/exp/typeparams v0.0.0-20221031165847-c99f073a8326/go.mod h1:AbB0pIl9nAr9wVwH+Z2ZpaocVmF5I4GyWCDIsVjR0bk=
+golang.org/x/exp v0.0.0-20221106115401-f9659909a136 h1:Fq7F/w7MAa1KJ5bt2aJ62ihqp9HDcRuyILskkpIAurw=
+golang.org/x/exp v0.0.0-20221106115401-f9659909a136/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
+golang.org/x/exp/typeparams v0.0.0-20221106115401-f9659909a136 h1:962j4VxUJV3GKI6NxKDI9NjATh+tAixlH+9k9MvHSlU=
+golang.org/x/exp/typeparams v0.0.0-20221106115401-f9659909a136/go.mod h1:AbB0pIl9nAr9wVwH+Z2ZpaocVmF5I4GyWCDIsVjR0bk=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3/go.mod h1:3p9vT2HGsQu2K1YbXdKPJLVgG5VJdoTa1poYQBtP1AY=
@@ -83,8 +83,8 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
-golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
@@ -98,8 +98,8 @@ golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.10/go.mod h1:Uh6Zz+xoGYZom868N8YTex3t7RhtHDBrE8Gzo9bV56E=
 golang.org/x/tools v0.2.0 h1:G6AHpWxTMGY1KyEYoAQ5WTtIekUUvDNjan3ugu60JvE=
 golang.org/x/tools v0.2.0/go.mod h1:y4OqIKeOV/fWJetJ8bXPU1sEVniLMIyDAZWeHdV+NTA=
-golang.org/x/vuln v0.0.0-20221025230227-995372c58a16 h1:/H6ddBUaKrFDOBFz0Y3l1/Ppbx19f/rK11jABxiqKFw=
-golang.org/x/vuln v0.0.0-20221025230227-995372c58a16/go.mod h1:F12iebNzxRMpJsm4W7ape+r/KdnXiSy3VC94WsyCG68=
+golang.org/x/vuln v0.0.0-20221103225512-4f561ca73b59 h1:eOOJSuIRc2QwKAgX5qOIhUZJAd2LLKSBfk839dv+Clo=
+golang.org/x/vuln v0.0.0-20221103225512-4f561ca73b59/go.mod h1:F12iebNzxRMpJsm4W7ape+r/KdnXiSy3VC94WsyCG68=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
--- a/scripts/README.md
+++ b/scripts/README.md
@@ -188,6 +188,10 @@ After the download you'll find the output locales in the `client/src/__locales/`
 directory.

 Optional environment:
+
+ *  `SLEEP_TIME`: set the sleep time between downloads for `locales:download`,
+    in milliseconds.  The default is 250 ms.
+
 *  `UPLOAD_LANGUAGE`: set an alternative language for `locales:upload` to
    upload.

--- a/scripts/translations/download.js
+++ b/scripts/translations/download.js
@@ -110,7 +110,8 @@ const download = async () => {

        // Don't request the Crowdin API too aggressively to prevent spurious
        // 400 errors.
-        await sleep(400);
+        const sleepTime = process.env.SLEEP_TIME || 250;
+        await sleep(sleepTime);
    }

    Promise
Author	SHA1	Message	Date
Ainar Garipov	0c7d56dca3	Merge branch 'master' into 4927-refactor-tls	2022-11-22 17:10:40 +03:00
Ainar Garipov	08282dc4d9	Pull request: 4927-imp-ui Updates #4927. Squashed commit of the following: commit 510143325805133e379ebc207cdc6bff59c94ade Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Tue Nov 22 15:00:13 2022 +0300 home: imp err commit fd65a9914494b6dccdee7c0f0aa08bce80ce0945 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Mon Nov 21 18:53:39 2022 +0300 client: imp validation ui	2022-11-22 17:07:49 +03:00
Ainar Garipov	f36efa26a4	home: refactor more	2022-11-21 19:45:18 +03:00
Ainar Garipov	a8850059db	home: refactor tls	2022-11-21 19:05:49 +03:00
Dimitry Kolyshev	93882d6860	Pull request: 4223 home: cmd update Merge in DNS/adguard-home from 4223-cmd-update to master Squashed commit of the following: commit ffda71246f37eaba0cb190840f1370ba65099d7c Author: Dimitry Kolyshev <dkolyshev@adguard.com> Date: Tue Nov 15 16:32:10 2022 +0200 home: cmd update commit 9c4e1c33da78952a2b1477ac380a0cf042a8990f Author: Dimitry Kolyshev <dkolyshev@adguard.com> Date: Tue Nov 15 13:51:33 2022 +0200 home: cmd update commit 6a564dc30771b3675e8861ca3befaaee15d83026 Author: Dimitry Kolyshev <dkolyshev@adguard.com> Date: Mon Nov 14 11:05:06 2022 +0200 all: docs commit a546bdbdb6f3f78c40908bc1864f2a1ae1c9071f Author: Dimitry Kolyshev <dkolyshev@adguard.com> Date: Mon Nov 14 10:55:16 2022 +0200 home: cmd update commit cbbb594980d3d163fe0489494b0ddca5f679d6e6 Author: Dimitry Kolyshev <dkolyshev@adguard.com> Date: Mon Nov 14 10:16:09 2022 +0200 home: imp code commit 677f8a7ca0f47da0ac636e5bab9db24506cf5041 Author: Dimitry Kolyshev <dkolyshev@adguard.com> Date: Sun Nov 13 14:12:48 2022 +0200 home: cmd update	2022-11-15 17:44:50 +03:00
Ainar Garipov	167b112511	Pull request: 5035-more-clients-netip-addr Updates #5035. Squashed commit of the following: commit 1934ea14299921760e9fcf6dd9053bd3155cb40e Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Wed Nov 9 14:19:54 2022 +0300 all: move more client code to netip.Addr	2022-11-09 14:37:07 +03:00
Ainar Garipov	98af0e000e	Pull request: upd-chlog Merge in DNS/adguard-home from upd-chlog to master Squashed commit of the following: commit efe2d95b870e413af4f91be5de7c7b97970e1dd5 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Tue Nov 8 18:08:03 2022 +0300 all: upd chlog	2022-11-08 18:15:01 +03:00
Ainar Garipov	2bfdcbbc10	Pull request: upd-before-release Merge in DNS/adguard-home from upd-before-release to master Squashed commit of the following: commit 71f36273a55f63d389188fd7df2950a6207549a9 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Tue Nov 8 14:35:18 2022 +0300 all: upd deps, tools, filters	2022-11-08 16:24:44 +03:00
Ainar Garipov	8fdbcc005c	Pull request: imp-pprof Merge in DNS/adguard-home from imp-pprof to master Squashed commit of the following: commit cd6c2ec15342ef55957ab65e1599733c2ee57b7b Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Mon Nov 7 19:45:12 2022 +0300 home: imp pprof handling, field alignment	2022-11-08 11:36:42 +03:00
Ainar Garipov	464fbf0b54	Pull request: 5089-windows-hosts-crash Updates #5089. Squashed commit of the following: commit dd3ce763326ad3207de111bb911e0a2665bcebba Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Mon Nov 7 16:21:43 2022 +0300 aghnet: fix comparison commit 0d736fb7fc5cb2e77fd533cd95fdf3fbc6dc86d1 Author: Ainar Garipov <A.Garipov@AdGuard.COM> Date: Mon Nov 7 14:13:05 2022 +0300 aghnet: fix crash	2022-11-07 16:51:07 +03:00