Remilia: add more stuff in nginx service

hosts/servers/remilia/networking.nix

@@ -1,13 +1,50 @@
-{config, ...}:
+{config, pkgs, ...}:
 {
   networking = {
     useDHCP = false;
     hostName = "Remilia";
-    firewall.allowedTCPPorts = [ 22 80 ];
+    firewall = {
+      interfaces = {
+        ens3 = {
+          allowedTCPPorts = [ 22 80 443 ];
+          allowedUDPPorts = [ 17840 ];
+        };
+      };
+    };
     interfaces = {
       ens3 = {
         useDHCP = true;
       };
     };
+    nat = {
+      enable = true;
+      externalInterface = "ens3";
+      internalInterfaces = [ "wg0" ];
+    };
+    wireguard.interfaces = {
+      wg0 = {
+        ips = [ "10.55.0.1/24" ];
+        listenPort = 17840;
+        postSetup = ''
+          ${pkgs.iptables}/bin/iptables -A FORWARD -i wg0 -j ACCEPT
+          ${pkgs.iptables}/bin/iptables -t nat -A POSTROUTING -s 10.55.0.0/24 -o ${config.networking.nat.externalInterface} -j MASQUERADE
+        '';
+        postShutdown = ''
+          ${pkgs.iptables}/bin/iptables -D FORWARD -i wg0 -j ACCEPT
+          ${pkgs.iptables}/bin/iptables -t nat -D POSTROUTING -s 10.55.0.0/24 -o ${config.networking.nat.externalInterface} -j MASQUERADE
+        '';
+        privateKeyFile = "/var/secrets/wg";
+        peers = [
+          {
+            publicKey = "m9SSpkj+r2QY4YEUMEoTkbOI/L7C39Kh6m45QZ5mkw4=";
+            allowedIPs = [ "10.55.0.2/32" ];
+          }
+          {
+            publicKey = "SqskEH7hz7Gv9ZS+FYLRFgKZyJCFbBFCyuvzBYnbfVU=";
+            allowedIPs = [ "10.55.0.3/32" ];
+          }
+        ];
+      };
+    };
   };
 }