diff --git a/hosts/server/configuration.nix b/hosts/server/configuration.nix
index 723845d..6a56a4b 100644
--- a/hosts/server/configuration.nix
+++ b/hosts/server/configuration.nix
@@ -122,8 +122,18 @@
   };
 
   # Open ports in the firewall.
-  networking.firewall.allowedTCPPorts = [ 22 25565 25575 38281 ];
-  networking.firewall.allowedUDPPorts = [ 22 25565 25575 38281 ];
+  networking.firewall.allowedTCPPorts = [ 
+	22 # ssh
+	25565 25575 # minecraft
+	38281 # archipelago
+	34197 27015 # factorio
+	];
+  networking.firewall.allowedUDPPorts = [
+	22 # ssh
+	25565 25575 # minecraft
+	38281 # archipelago
+	34197 27015 # factorio
+	];
   # Or disable the firewall altogether.
   # networking.firewall.enable = false;