Assign static IP to server

modules/networking.nix

@@ -1,6 +1,23 @@
 { config, lib, pkgs, ... }:
 
 {
+  # Assign a static IP
+  networking = {
+    interfaces.eth0 = {
+      useDHCP = false;
+      addresses = {
+        address = "10.0.1.3";
+        prefixLength = 24;
+      };
+    };
+    defaultGateway = {
+      address = "10.0.1.1";
+      interface = "eth0";
+    };
+    nameservers = [ "1.1.1.1" "8.8.8.8" ];
+    enableIPv6 = false;
+  };
+
   # Enable zeroconf
   services.avahi = {
     enable = true;
@@ -16,11 +33,18 @@
 
   # Firewall configuration
   networking.firewall = {
-    # Samba
-    allowedTCPPorts = [ 445 139 ];
-    allowedUDPPorts = [ 137 138 ];
+    allowedTCPPorts = [
+      445 # Samba
+      139 # Samba
+    ];
+    allowedUDPPorts = [
+      137 # Samba
+      138 # Samba
+      1194 # Wireguard
+    ];
+    extraCommands = ''
+      iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE
+    '';
   };
 
-  # Disable IPv6
-  networking.enableIPv6 = false;
 }