nixos/system/services/networking.nix

{ config, pkgs, ... }:
{
  networking = {
    wireless = {
      enable = false;
      networks = {
        #    "bennynet" = {
        #      pskRaw = "85e8f17e02f4b4df5ddc9b95d1a4256b3c2608fcc8dfa1860b693d06c2a0bf1f";
        #      };
      };
    };
    firewall = {
      enable = true;
      allowedTCPPorts = [ 22 ];
      extraCommands = "iptables -A INPUT -s 192.168.0.0/16 -j ACCEPT";

    };
  };
}