feat: frikandel as wireguard hub

flake.nix

@@ -103,7 +103,7 @@
 
           frikandel = {
             hostname = "frikandel.b12f.io";
-            sshUser = "root";
+            sshUser = "yule";
           };
 
           maoam = {

hosts/default.nix

@@ -61,6 +61,7 @@
           ./pie
           self.nixosModules.yule
           self.nixosModules.docker
+          self.nixosModules.wireguard-client
         ];
       };
 

hosts/frikandel/default.nix

@@ -4,5 +4,6 @@
     ./configuration.nix
 
     ./networking.nix
+    ./wireguard.nix
   ];
 }

hosts/frikandel/networking.nix

@@ -9,6 +9,8 @@
   networking.hostId = "44234773";
   networking.nameservers = [ "9.9.9.9" ];
 
+  services.openssh.openFirewall = true;
+
   # Network configuration (Hetzner uses static IP assignments, and we don't use DHCP here)
   networking.useDHCP = false;
   networking.interfaces.enp1s0 = {

hosts/frikandel/wireguard.nix

@@ -4,53 +4,52 @@
   pkgs,
   ...
 }: {
-  age.secrets.wg-private-key-server.file = "${flake.self}/secrets/wg-private-pie-server.age";
+  age.secrets.wg-private-key-server.file = "${flake.self}/secrets/wg-private-frikandel-server.age";
+
+  boot.kernel.sysctl = {
+    "net.ipv4.ip_forward" = 1;
+  };
 
   networking.nat = {
     enable = true;
     enableIPv6 = true;
     internalInterfaces = [ "wg-server" ];
   };
-  networking.firewall.allowedUDPPorts = [ 51898 ];
+
+  networking.firewall.allowedUDPPorts = [ 51899 ];
+  networking.firewall.extraForwardRules = [
+    "iifname wg0 accept"
+    "iifname enp1s0 reject"
+  ];
 
   # Enable WireGuard
   networking.wg-quick.interfaces = {
-    wg-server = {
-      listenPort = 51898;
+    wg0 = {
+      listenPort = 51899;
 
-      address = [ "10.0.1.2/32" ];
-
-      dns = [ "10.0.1.2" ];
+      address = [ "10.0.1.7/32" ];
 
       privateKeyFile = "/run/agenix/wg-private-key-server";
 
       peers = [
-        # {
-        #   # router
-        #   publicKey = "";
-        #   allowedIPs = ["10.0.1.1/32"];
-
-        #   persistentKeepalive = 25;
-        # }
-        {
-          # droppie
+        { # pie
+          publicKey = "8M/+y6AqbSsbK0JENkjRXqlRR56iiM/QRjGGtEM+Uj8=";
+          allowedIPs = [ "10.0.1.2/32" ];
+          persistentKeepalive = 25;
+        }
+        { # droppie
           publicKey = "qsnBMoj9Z16D8PJ5ummRtIfT5AiMpoF3SoOCo4sbyiw=";
           allowedIPs = [ "10.0.1.3/32" ];
-
           persistentKeepalive = 25;
         }
-        {
-          # chocolatebar
+        { # chocolatebar
           publicKey = "nk8EtGE/QsnSEm1lhLS3/w83nOBD2OGYhODIf92G91A=";
           allowedIPs = [ "10.0.1.5/32" ];
-
           persistentKeepalive = 25;
         }
-        {
-          # biolimo
+        { # biolimo
           publicKey = "4ymN7wwBuhF+h+5fFN0TqXmVyOe1AsWiTqRL0jJ3CDc=";
           allowedIPs = [ "10.0.1.6/32" ];
-
           persistentKeepalive = 25;
         }
       ];

hosts/pie/configuration.nix

@@ -39,20 +39,6 @@ in {
 
   pub-solar.core.disk-encryption-active = false;
 
-  services.openssh.openFirewall = true;
-
-  security.sudo.extraRules = [
-    {
-      users = ["${psCfg.user.name}"];
-      commands = [
-        {
-          command = "ALL";
-          options = ["NOPASSWD"];
-        }
-      ];
-    }
-  ];
-
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
   # on your system were taken. It‘s perfectly fine and recommended to leave

hosts/pie/default.nix

@@ -5,7 +5,6 @@
 
     ./networking.nix
     ./backup.nix
-    ./wireguard.nix
     ./unbound.nix
     ./dhcpd.nix
     ./wake-droppie.nix

hosts/pie/networking.nix

@@ -20,7 +20,7 @@
   networking.hosts = flake.self.lib.addLocalHostname ["caddy.local"];
   networking.firewall.allowedTCPPorts = [ 80 ];
 
-  services.openssh.allowSFTP = true;
+  services.openssh.openFirewall = true;
 
   # Caddy reverse proxy for local services like cups
   services.caddy = {
@@ -29,4 +29,11 @@
       auto_https off
     '';
   };
+
+  age.secrets.wg-private-key.file = "${flake.self}/secrets/wg-private-pie.age";
+
+  pub-solar.wireguard-client = {
+    ownIPs = [ "10.0.1.2/32" ];
+    wireguardPrivateKeyFile = "/run/agenix/wg-private-key";
+  };
 }

hosts/pie/unbound.nix

@@ -37,14 +37,17 @@
           "\"pie.local. 10800 IN A 192.168.178.2\""
           "\"pie.local. 10800 IN AAAA 2a02:908:5b1:e3c0:3077:2::\""
 
-          "\"vpn.b12f.io. 10800 IN AAAA 2a02:908:5b1:e3c0:3077:2::\""
-
           "\"pie.b12f.io. 10800 IN A 10.0.1.2\""
           "\"firefly.b12f.io. 10800 IN A 10.0.1.2\""
           "\"firefly-importer.b12f.io. 10800 IN A 10.0.1.2\""
           "\"paperless.b12f.io. 10800 IN A 10.0.1.2\""
           "\"invoicing.b12f.io. 10800 IN A 10.0.1.2\""
 
+          "\"vpn.b12f.io. 10800 IN A 128.140.109.213\""
+          "\"vpn.b12f.io. 10800 IN AAAA 2a02:908:5b1:e3c0:3077:2::\""
+
+          "\"frikandel.b12f.io. 10800 IN A 10.0.1.7\""
+
           "\"fritz.box. 10800 IN A 192.168.178.1\""
           "\"fritz.box. 10800 IN AAAA fd00::3ea6:2fff:fe57:30b0\""
         ];

modules/core/default.nix

@@ -5,6 +5,7 @@
 }:
 with lib; let
   cfg = config.pub-solar.core;
+  psCfg = config.pub-solar;
 in {
   imports = [
     ./boot.nix
@@ -28,6 +29,17 @@ in {
 
   # Limit the use of sudo to the group wheel
   security.sudo.execWheelOnly = true;
+  security.sudo.extraRules = [
+    {
+      users = ["${psCfg.user.name}"];
+      commands = [
+        {
+          command = "ALL";
+          options = ["NOPASSWD"];
+        }
+      ];
+    }
+  ];
 
   # Remove the complete default environment of packages like
   # nano, perl and rsync

modules/core/networking.nix

@@ -16,6 +16,7 @@
   };
 
   networking.firewall.enable = true;
+  networking.nftables.enable = true;
 
   # For rage encryption, all hosts need a ssh key pair
   services.openssh = {

modules/wireguard-client/default.nix

@@ -35,10 +35,10 @@ in {
         privateKeyFile = cfg.wireguardPrivateKeyFile;
         peers = [
           {
-            # pie-server
-            publicKey = "8M/+y6AqbSsbK0JENkjRXqlRR56iiM/QRjGGtEM+Uj8=";
-            allowedIPs = [ "10.0.1.2/32" ];
-            endpoint = "[2a02:908:5b1:e3c0:3077:2::]:51898";
+            # frikandel
+            publicKey = "p6YKNYBlySKfhTN+wbSsKdoNjzko/XSAiTAlCJzP1jA=";
+            allowedIPs = [ "10.0.1.0/24" ];
+            endpoint = "[2a01:4f8:c2c:b60::]:51899";
             persistentKeepalive = 25;
           }
         ];

secrets/secrets.nix

@@ -12,6 +12,8 @@ let
 
   pie-host = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINcTORdlVno0B9R6Yh9qmlOZKA/ZQ8RBzXK7/1rBbE02 root@pie.local";
 
+  frikandel-host = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPzrEsby3KYpKRuSnTMp2Iq4ENgucQUy6SJ+906nwllS root@frikandel";
+
   baseKeys = [
     bbcom
   ];
@@ -34,6 +36,10 @@ let
   pieKeys = [
     pie-host
   ];
+
+  frikandelKeys = [
+    frikandel-host
+  ];
 in {
   "vnc-cert-chocolatebar.pem".publicKeys = chocolatebarKeys ++ baseKeys;
   "vnc-key-chocolatebar.pem".publicKeys = chocolatebarKeys ++ baseKeys;
@@ -63,6 +69,7 @@ in {
   "wg-private-pie.age".publicKeys = pieKeys ++ baseKeys;
   "wg-private-droppie.age".publicKeys = droppieKeys ++ baseKeys;
   "wg-private-pie-server.age".publicKeys = pieKeys ++ baseKeys;
+  "wg-private-frikandel-server.age".publicKeys = frikandelKeys ++ baseKeys;
 
   "invoiceplane-db-password.age".publicKeys = pieKeys ++ baseKeys;
   "invoiceplane-db-secrets.env".publicKeys = pieKeys ++ baseKeys;