{ ... }: {
  networking.firewall.allowedTCPPortRanges = [
    {
      from = 6881;
      to = 6999;
    }
    {
      from = 50101;
      to = 50109;
    }
  ];
  networking.firewall.allowedUDPPortRanges = [
    {
      from = 6881;
      to = 6999;
    }
    {
      from = 50101;
      to = 50109;
    }
  ];
}