tunnel munin node traffic on lan through wireguard

nixos/agares/configuration.nix

@@ -86,7 +86,7 @@
     enable = true;
     extraConfig = ''
       host_name ${config.networking.hostName}
-      cidr_allow 192.168.101.184/32
+      cidr_allow 10.3.3.3/32
     '';
   };
 

nixos/agares/network.nix

@@ -63,6 +63,26 @@ in
             };
         }];
       };
+      "20-wg0" = {
+        netdevConfig = {
+          Kind = "wireguard";
+          Name = "wg0";
+        };
+        wireguardConfig = {
+          PrivateKeyFile = config.age.secrets."wg-privkey-wg0".path;
+          ListenPort = 51235;
+        };
+        wireguardPeers = lib.singleton {
+          wireguardPeerConfig = {
+            PublicKey = "Kw2HVRb1zeA7NAzBvI3UzmOj45VqM358EBuZWdlAUDE=";
+            AllowedIPs = [
+              "10.3.3.3/32"
+              "fd42:9c3b:f96d:121::3/128"
+              "fd42:9c3b:f96d:101:4a21:bff:fe3e:9cfe/128"
+            ];
+          };
+        };
+      };
     };
     networks =
       let
@@ -126,6 +146,17 @@ in
             }
           ];
         };
+        "30-wg0" = {
+          matchConfig.Name = "wg0";
+          address = [ "10.3.3.2/32" "fd42:9c3b:f96d:121::2/128" ];
+          DHCP = "no";
+          networkConfig.IPv6AcceptRA = false;
+          linkConfig.RequiredForOnline = false;
+          routes = [
+            { routeConfig = { Destination = "10.3.3.1/24"; }; }
+            { routeConfig = { Destination = "fd42:9c3b:f96d:121::1/64"; }; }
+          ];
+        };
         "30-lan" = subnet "lan.10" "101" // {
           dhcpServerStaticLeases = [
             {
@@ -237,6 +268,11 @@ in
     owner = "systemd-network";
   };
 
+  age.secrets."wg-privkey-wg0" = {
+    file = "${config.dadada.secrets.path}/agares-wg0-key.age";
+    owner = "systemd-network";
+  };
+
   boot.kernel.sysctl = {
     # Enable forwarding for interface
     "net.ipv4.conf.all.forwarding" = "1";

nixos/agares/rules.nft

@@ -64,13 +64,17 @@ table inet filter {
     udp dport { 53, 67 } accept comment "Allow DNS and DHCP from Freifunk"
   }
 
+  chain input_wg0 {
+    tcp dport 4949 accept comment "Munin node"
+  }
+
   chain input {
     type filter hook input priority filter; policy drop;
 
     ct state {established, related} counter accept comment "Accept packets from established and related connections"
     ct state invalid counter drop comment "Early drop of invalid packets"
 
-    iifname vmap { lo : accept, $IF_WAN : jump input_wan, $IF_LAN : jump input_lan, $IF_FF : jump input_ff, $IF_ROADW : jump input_roadw, $IF_MODEM : jump input_modem, $IF_MGMT : jump input_mgmt }
+    iifname vmap { lo : accept, $IF_WAN : jump input_wan, $IF_LAN : jump input_lan, $IF_FF : jump input_ff, $IF_ROADW : jump input_roadw, $IF_MODEM : jump input_modem, $IF_MGMT : jump input_mgmt, wg0 : jump input_wg0 }
   }
 
 # Only works if hardware flow offloading is available

nixos/ninurta/configuration.nix

@@ -6,9 +6,9 @@ let
     "backup1.dadada.li"
   ];
   secretsPath = config.dadada.secrets.path;
-  wg0PrivKey = "pruflas-wg0-key";
+  uwuPrivKey = "pruflas-wg0-key";
   wgHydraPrivKey = "pruflas-wg-hydra-key";
-  wg0PresharedKey = "pruflas-wg0-preshared-key";
+  uwuPresharedKey = "pruflas-wg0-preshared-key";
   hydraGitHubAuth = "hydra-github-authorization";
   initrdSshKey = "/etc/ssh/ssh_initrd_ed25519_key";
   softServePort = 23231;
@@ -198,12 +198,13 @@ in
     "v /mnt/storage/backups 0755 root root - -"
   ];
 
-  age.secrets.${wg0PrivKey} = {
-    file = "${secretsPath}/${wg0PrivKey}.age";
+  age.secrets.${uwuPrivKey} = {
+    file = "${secretsPath}/${uwuPrivKey}.age";
     owner = "systemd-network";
   };
-  age.secrets.${wg0PresharedKey} = {
-    file = "${secretsPath}/${wg0PresharedKey}.age";
+
+  age.secrets.${uwuPresharedKey} = {
+    file = "${secretsPath}/${uwuPresharedKey}.age";
     owner = "systemd-network";
   };
   age.secrets.${wgHydraPrivKey} = {
@@ -285,8 +286,8 @@ in
           UseDNS = true;
         };
       };
-      "10-surgat" = {
-        matchConfig.Name = "surgat";
+      "30-wg0" = {
+        matchConfig.Name = "wg0";
         address = [ "10.3.3.3/32" "fd42:9c3b:f96d:121::3/128" ];
         DHCP = "no";
         networkConfig.IPv6AcceptRA = false;
@@ -296,7 +297,7 @@ in
           { routeConfig = { Destination = "fd42:9c3b:f96d:121::1/64"; }; }
         ];
       };
-      "10-uwu" = {
+      "30-uwu" = {
         matchConfig.Name = "uwu";
         address = [ "10.11.0.39/24" "fc00:1337:dead:beef::10.11.0.39/128" ];
         dns = [ "10.11.0.1%uwu#uwu" ];
@@ -311,38 +312,47 @@ in
       };
     };
     netdevs = {
-      "10-surgat" = {
+      "20-wg0" = {
         netdevConfig = {
           Kind = "wireguard";
-          Name = "surgat";
+          Name = "wg0";
         };
         wireguardConfig = {
           PrivateKeyFile = config.age.secrets.${wgHydraPrivKey}.path;
           ListenPort = 51235;
         };
-        wireguardPeers = [{
-          wireguardPeerConfig = {
-            PublicKey = "KzL+PKlv4LktIqqTqC9Esw8dkSZN2qSn/vq76UHbOlY=";
-            AllowedIPs = [ "10.3.3.1/32" "fd42:9c3b:f96d:121::1/128" ];
-            PersistentKeepalive = 25;
-            Endpoint = "surgat.dadada.li:51235";
-          };
-        }];
+        wireguardPeers = [
+          {
+            wireguardPeerConfig = {
+              PublicKey = "KzL+PKlv4LktIqqTqC9Esw8dkSZN2qSn/vq76UHbOlY=";
+              AllowedIPs = [ "10.3.3.1/32" "fd42:9c3b:f96d:121::1/128" ];
+              PersistentKeepalive = 25;
+              Endpoint = "surgat.dadada.li:51235";
+            };
+          }
+          {
+            wireguardPeerConfig = {
+              PublicKey = "INfv++4R+Kd2jdh/3CooM70ZeeoN6aeU6mo+T4C8gWU=";
+              AllowedIPs = [ "10.3.3.2/32" "fd42:9c3b:f96d:121::2/128" ];
+              Endpoint = "192.168.101.1:51235";
+            };
+          }
+        ];
       };
-      "10-uwu" = {
+      "20-uwu" = {
         netdevConfig = {
           Kind = "wireguard";
           Name = "uwu";
         };
         wireguardConfig = {
-          PrivateKeyFile = config.age.secrets.${wg0PrivKey}.path;
+          PrivateKeyFile = config.age.secrets.${uwuPrivKey}.path;
         };
         wireguardPeers = [{
           wireguardPeerConfig = {
             PublicKey = "tuoiOWqgHz/lrgTcLjX+xIhvxh9jDH6gmDw2ZMvX5T8=";
             AllowedIPs = [ "10.11.0.0/22" "fc00:1337:dead:beef::10.11.0.0/118" "192.168.178.0/23" ];
             PersistentKeepalive = 25;
-            PresharedKeyFile = config.age.secrets.${wg0PresharedKey}.path;
+            PresharedKeyFile = config.age.secrets.${uwuPresharedKey}.path;
             Endpoint = "53c70r.de:51820";
           };
         }];

nixos/ninurta/monitoring.nix

@@ -15,13 +15,13 @@
     enable = true;
     hosts = ''
       [${config.networking.hostName}]
-        address localhost
+        address 10.3.3.3
 
       [surgat]
         address 10.3.3.1
 
       [agares]
-        address 192.168.101.1
+        address 10.3.3.2
     '';
   };
   services.munin-node.enable = true;

secrets/agares-wg0-key.age

@@ -0,0 +1,10 @@
+age-encryption.org/v1
+-> ssh-ed25519 L7f05w ENcdsQ43v/xIe1Ej4BYjb/nTjIk76N2DR/zj754Puz0
+vIDFk+A/m8rOnBNXcvfBX4SJNxT6LP64s674v5pJtcQ
+-> ssh-ed25519 Otklkw lLwVf/2E67Bue+VBu+EMupLjuv6wfR656CD1st71GRM
+AsXHvpANM0mOiSW3LTqzbEneVQSKNb0TvsMY2WCPfbk
+-> DJZq-grease 9))O09 z2-
+ZFxd5v9Bma6VVIvpw8VK0DSR55lHUNOTh6cNxFJAezXn1apmjvuZPdMSXZ7OrE23
+qlqnskWvo+SX3JF7NH0yQf53dZJU
+--- pSa5IqZmIDAHJkcPgqrS0WUwnD1ipE2pGr87qhTmrjk
+Ű(E<>/—P(<28>©Ő|JĄ€řŞëŘ‘éŇ‹<C587>zń`JOÁ2“ŚÔ–‚Űńd3qÁ±¤‡O­Ú!”8ňůHN3\°ĹŹę‘iš

secrets/secrets.nix

@@ -27,6 +27,7 @@ in
   "etc-ppp-chap-secrets.age".publicKeys = [ systems.agares dadada ];
   "etc-ppp-telekom-secret.age".publicKeys = [ systems.agares dadada ];
   "wg-privkey-vpn-dadada-li.age".publicKeys = [ systems.agares dadada ];
+  "agares-wg0-key.age".publicKeys = [ systems.agares dadada ];
 } //
 backupSecrets "ninurta" //
 backupSecrets "gorgon" //