NixOS-Config/modules/system/devices/networking/wireguard/pc/default.nix

{ config, ... }:
{
  networking = {
    firewall.allowedUDPPorts = [ 51820 ];

    wireguard.interfaces = {
      "${config.ips.wgInt}" = {
        # Define IP of client in per device config
        listenPort = 51820;
        privateKey = config.secrets.wgClientPriv;
        peers = [
          { # NixOS Server
            publicKey = "qnOT/lXOJMaQgDUdXpyfGZB2IEyUouRje2m/bCe9ux8=";
            allowedIPs = [ "${config.ips.wgSpan}.0/24" ];
            endpoint = "sv.${config.domains.jim1}:51820";
            persistentKeepalive = 25;
          }
        ];
      };
    };
  };
}