NixOS-Config/nixos/server/wireguard.nix

{outputs, ...}: let
  ips = import ../modules/ips.nix;
in {
  # enable NAT
  networking = {
    nat = {
      enable = true;
      externalInterface = "${ips.netInt}";
      internalInterfaces = [ "wg0" ];
    };
    firewall.allowedUDPPorts = [ 51820 ];
  };

  networking.wireguard = {
    enable = true;
    interfaces = {
      # Wireguard interface name can be arbitrary
      wg0 = {
        # Determines the IP address and subnet of the server's end of the tunnel interface.
        ips = [ "10.100.0.1/24" ];
        listenPort = 51820;
	privateKey = outputs.secrets.wireguardPriv;
        peers = [
          { # Jimbo Pixel 9
            publicKey = outputs.secrets.wirePixel9Pub;
            allowedIPs = [ "10.100.0.2/32" ];
          }
          { # Jimbo Pixel 4
            publicKey = outputs.secrets.wirePixel4Pub;
            allowedIPs = [ "10.100.0.3/32" ];
          }
        ];
      };
    };
  };
}