diff --git a/hosts/nixos-common.nix b/hosts/nixos-common.nix
index 6a759cf..eca85d9 100644
--- a/hosts/nixos-common.nix
+++ b/hosts/nixos-common.nix
@@ -12,6 +12,11 @@
   # Networking
   networking.networkmanager.enable = true;
 
+  # Firewall
+  networking.firewall.enable = true;
+  networking.firewall.allowedTCPPorts = [ ];
+  networking.firewall.allowedUDPPorts = [ ];
+
   # Set your time zone.
   time.timeZone = "Australia/Sydney";