WIP: router replace CoreDNS with AdGuard Home

hosts/router/default.nix

@@ -21,9 +21,12 @@ let
   lan20_p6 = "${pd_from_wan}2"; # ::/64
 
   ula_p = "fdab:07d3:581d"; # ::/48
-  ula_p_lan = "${ula_p}:0001"; # ::/64
+  lan_ula_p = "${ula_p}:0001"; # ::/64
-  ula_p_lan10 = "${ula_p}:0010"; # ::/64
+  lan10_ula_p = "${ula_p}:0010"; # ::/64
-  ula_p_lan20 = "${ula_p}:0020"; # ::/64
+  lan20_ula_p = "${ula_p}:0020"; # ::/64
+  lan_ula_addr = "${lan_ula_p}::1";
+  lan10_ula_addr = "${lan10_ula_p}::1";
+  lan20_ula_addr = "${lan20_ula_p}::1";
 in
 {
   imports =
@@ -152,19 +155,20 @@ in
             # AddressAutoconfiguration = false;
             Prefix = "${lan_p6}::/64";
             Assign = true;
-            Token = [ "static:::1" "eui64" ];
+            # Token = [ "static:::1" "eui64" ];
+            Token = [ "static:::1" ];
           }
           {
-            Prefix = "${ula_p_lan}::/64";
+            Prefix = "${lan_ula_p}::/64";
             Assign = true;
-            Token = [ "static:::1" "eui64" ];
+            Token = [ "static:::1" ];
           }
         ];
         ipv6SendRAConfig = {
           Managed = true;
           OtherInformation = true;
           EmitDNS = true;
-          DNS = [ "${lan_p6}::1" ];
+          DNS = [ lan_ula_addr ];
         };
       };
       "30-vlan10"  = {
@@ -177,12 +181,12 @@ in
           {
             Prefix = "${lan10_p6}::/64";
             Assign = true;
-            Token = [ "static:::1" "eui64" ];
+            Token = [ "static:::1" ];
           }
           {
-            Prefix = "${ula_p_lan10}::/64";
+            Prefix = "${lan10_ula_p}::/64";
             Assign = true;
-            Token = [ "static:::1" "eui64" ];
+            Token = [ "static:::1" ];
           }
         ];
       };
@@ -196,12 +200,12 @@ in
           {
             Prefix = "${lan20_p6}::/64";
             Assign = true;
-            Token = [ "static:::1" "eui64" ];
+            Token = [ "static:::1" ];
           }
           {
-            Prefix = "${ula_p_lan20}::/64";
+            Prefix = "${lan20_ula_p}::/64";
             Assign = true;
-            Token = [ "static:::1" "eui64" ];
+            Token = [ "static:::1" ];
           }
         ];
       };
@@ -217,15 +221,15 @@ in
       define LAN_IF = "${if_lan}"
       define LAN_IPV4_SUBNET = ${lan_p4}.0/24
       define LAN_IPV6_SUBNET = ${lan_p6}::/64
+      define LAN_IPV6_ULA = ${lan_ula_p}::/64
       define LAN_IPV4_HOST = ${lan_p4}.100
       define LAN_IPV6_HOST = ${lan_p6}::1:1000
 
-      define ALLOWED_TCP_PORTS = { ssh, 19999 }
+      define ALLOWED_TCP_PORTS = { ssh, https, 19999 }
-      define ALLOWED_UDP_PORTS = { 53 }
+      define ALLOWED_UDP_PORTS = { domain }
 
       chain input {
           type filter hook input priority filter; policy drop;
-          # type filter hook input priority filter; policy accept;
 
           # Allow established and related connections
           ct state established,related accept
@@ -238,7 +242,7 @@ in
           ip6 nexthdr icmpv6 ip6 daddr fe80::/10 accept # TODO: not sure if necessary
 
           # Allow all ICMPv6 from LAN
-          iifname $LAN_IF ip6 saddr $LAN_IPV6_SUBNET ip6 nexthdr icmpv6 accept
+          iifname $LAN_IF ip6 saddr { $LAN_IPV6_SUBNET, $LAN_IPV6_ULA } ip6 nexthdr icmpv6 accept
           # Allow DHCPv6 client traffic
           ip6 daddr { fe80::/10, ff02::/16 } udp dport dhcpv6-server accept
 
@@ -247,9 +251,9 @@ in
 
           # Allow specific services from LAN
           iifname $LAN_IF ip saddr $LAN_IPV4_SUBNET tcp dport $ALLOWED_TCP_PORTS accept
-          iifname $LAN_IF ip6 saddr $LAN_IPV6_SUBNET tcp dport $ALLOWED_TCP_PORTS accept
+          iifname $LAN_IF ip6 saddr { $LAN_IPV6_SUBNET, $LAN_IPV6_ULA } tcp dport $ALLOWED_TCP_PORTS accept
           iifname $LAN_IF ip saddr $LAN_IPV4_SUBNET udp dport $ALLOWED_UDP_PORTS accept
-          iifname $LAN_IF ip6 saddr $LAN_IPV6_SUBNET udp dport $ALLOWED_UDP_PORTS accept
+          iifname $LAN_IF ip6 saddr { $LAN_IPV6_SUBNET, $LAN_IPV6_ULA } udp dport $ALLOWED_UDP_PORTS accept
 
           # Allow SSH from WAN (if needed)
           iifname $WAN_IF tcp dport ssh accept
@@ -257,7 +261,6 @@ in
 
       chain forward {
           type filter hook forward priority filter; policy drop;
-          # type filter hook forward priority filter; policy accept;
 
           # Allow established and related connections
           ct state established,related accept
@@ -296,7 +299,7 @@ in
           oifname $WAN_IF ip saddr $LAN_IPV4_SUBNET masquerade
 
           # Optional IPv6 masquerading (big L if enabled)
-          # oifname $WAN_IF ip6 saddr $LAN_IPV6_SUBNET masquerade
+          # oifname $WAN_IF ip6 saddr $LAN_IPV6_ULA masquerade
       }
     '';
   };
@@ -341,20 +344,21 @@ in
       if_lan
     ];
     # TODO: https://kea.readthedocs.io/en/latest/arm/ddns.html#dual-stack-environments
-    dhcp-ddns.enable-updates = false;
+    dhcp-ddns.enable-updates = true;
-    ddns-qualifying-suffix = "default.${ldomain}";
+    ddns-qualifying-suffix = "default6.${ldomain}";
     subnet6 = [
       {
         id = 1;
         interface = if_lan;
         subnet = "${lan_p6}::/64";
-        ddns-qualifying-suffix = "lan.${ldomain}";
+        ddns-qualifying-suffix = "lan6.${ldomain}";
         rapid-commit = true;
         pools = [ { pool = "${lan_p6}::1:1000/116"; } ];
-        option-data = [
+        reservations = [
           {
-            name = "dns-servers";
+            duid = "00:04:59:c3:ce:9a:08:cf:fb:b7:fe:74:9c:e3:b7:44:bf:01";
-            data = "${lan_p6}::1";
+            hostname = "archy";
+            ip-addresses = [ "${lan_p6}::69" ];
           }
         ];
       }
@@ -381,34 +385,26 @@ in
   services.resolved.enable = false;
   networking.resolvconf.enable = true;
   networking.resolvconf.useLocalResolver = true;
-  services.coredns.enable = true;
-  services.coredns.config = ''
-  . {
-      cache {
-          prefetch 100
-      }
-      # Static aliases
-      hosts /etc/coredns.hosts {
-          fallthrough
-      }
-      # Local domains to knot (ddns)
-      forward ${ldomain}. [::1]:1053
 
-      # Quad9
+  services.adguardhome.enable = true;
-      # forward . tls://[2620:fe::fe]:53 tls://9.9.9.9 tls://[2620:fe::9]:53 tls://149.112.112.112 {
+  services.adguardhome.mutableSettings = false;
-      #    tls_servername dns.quad9.net
+  services.adguardhome.settings = {
+    dns = {
+      bootstrap_dns = [ "1.1.1.1" "9.9.9.9" ];
+      upstream_dns = [
+        "quic://p0.freedns.controld.com"  # Default upstream
+        "[/${ldomain}/][::1]:1053"        # Local domains to Knot (ddns)
+      ];
+    };
+    # https://adguard-dns.io/kb/general/dns-filtering-syntax/
+    user_rules = [
+      # DNS rewrites
+      "${lan_ula_addr} grouter.${domain}"
 
-      # Cloudflare (seems to be faster)
+      # Allowed exceptions
-      forward . tls://[2606:4700:4700::1112]:53 tls://1.1.1.2 tls://[2606:4700:4700::1002]:53 tls://1.0.0.2 {
+      "@@||googleads.g.doubleclick.net"
-          tls_servername security.cloudflare-dns.com
+    ];
-          health_check 5s
+  };
-      }
-  }
-  '';
-
-  environment.etc."coredns.hosts".text = ''
-    ::1 wow.${domain} hi.${domain}
-  '';
 
   services.knot.enable = true;
   services.knot.settings = {
@@ -456,7 +452,51 @@ in
     chmod 644 "$ZONE_FILE"
   '';
 
-  services.netdata.enable = true;
+  # https://wiki.nixos.org/wiki/Prometheus
+  services.prometheus = {
+    enable = true;
+    exporters = {
+      # TODO: DNS, Kea, Knot, other exporters
+      node = {
+        enable = true;
+        enabledCollectors = [ "systemd" ];
+      };
+    };
+    scrapeConfigs = [
+      {
+        job_name = "node";
+        static_configs = [{
+          targets = [ "localhost:${toString config.services.prometheus.exporters.node.port}" ];
+        }];
+      }
+    ];
+  };
+
+  # https://wiki.nixos.org/wiki/Grafana#Declarative_configuration
+  services.grafana = {
+    enable = true;
+    settings.server.http_port = 3001;
+    provision = {
+      enable = true;
+      datasources.settings.datasources = [
+        {
+          name = "Prometheus";
+          type = "prometheus";
+          url = "http://localhost:${toString config.services.prometheus.port}";
+        }
+      ];
+    };
+  };
+
+  services.caddy = {
+    enable = true;
+    virtualHosts."grouter.${domain}".extraConfig = ''
+      reverse_proxy localhost:${toString config.services.grafana.settings.server.http_port}
+      tls internal
+    '';
+  };
+
+  # services.netdata.enable = true;
 
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