nixos-server/services/smb.nix

{ pkgs, lib, ... }: 
{
  name = "smb";
  config = {
  };
  ports = {
    tcp = [ 111 2049 ];
    udp = [ 111 2049 ];
    http = null;
    forward = [
      { container = 111;  host = 111;  proto = "tcp"; }
      { container = 111;  host = 111;  proto = "udp"; }
      { container = 2049; host = 2049; proto = "tcp"; }
      { container = 2049; host = 2049; proto = "udp"; }
    ];
  };
  hosts = [];
  volumes = [{
    name = "smb";
    mountPoint = "/srv/smb/";
    readOnly = false;
    backup = false;
  }];
}