config-perso/machines/kat-r86s/router.nix

{config, lib, pkgs, ...}: {
  boot.kernel.sysctl."net.ipv4.ip_forward" = true;

  networking.nat = {
    enable = true;
    internalInterfaces = [ "enp2s0" ];
    externalInterface = "enp1s0";
  };
  networking.interfaces.enp2s0 = {
    useDHCP = false;
    ipv4.addresses = [{ address = "192.168.42.1"; prefixLength = 24; }];
  };

  services.dnsmasq = {
    enable = true;
    settings = {
      interface = [ "enp2s0" ];
      bind-dynamic = true;
      dhcp-option = "3,0.0.0.0";
      dhcp-range = "192.168.42.100,192.168.42.254,255.255.255.0,12h";
    };
  };
}