{

  services.fail2ban = {
    enable = true;
    maxretry = 3;
    ignoreIP = [ "127.0.0.0/8" "10.0.0.0/8" "192.168.0.0/16" ];
  };

  networking.firewall = {
    enable = true;
    allowedTCPPorts = [ 22 ];
  };
}