Extract router roles

role/base.nix

@@ -4,24 +4,21 @@
 {
   system.autoUpgrade.enable = true;
 
-  # Select internationalisation properties.
   i18n = {
     consoleFont = "Lat2-Terminus16";
     consoleKeyMap = "sg-latin1";
     defaultLocale = "en_US.UTF-8";
   };
-  # List packages installed in system profile. To search, run:
-  # $ nix search wget
+  
   environment.systemPackages = with pkgs; [
     wget curl vim tmux git ncat bind
   ];
 
-  # Some programs need SUID wrappers, can be configured further or are
-  # started in user sessions.
-  # programs.mtr.enable = true;
-  # programs.gnupg.agent = { enable = true; enableSSHSupport = true; };
-
-  # List services that you want to enable:
+  # Networking
+  networking.firewall = {
+    allowPing = true;
+    allowedTCPPorts = [ 22 ];
+  };
 
   # Enable the OpenSSH daemon.
   services.openssh.enable = true;