private static void SendNodes(UdpItem item, UdpListener udp, ulong time)
        {
            var linq = from x in UserPool.AUsers
                       where x.NodePort > 0 && x.Version.StartsWith("Ares 2.")
                       select new IPEndPoint(x.ExternalIP, x.DataPort);

            if (linq.Count() > 0)
            {
                List<IPEndPoint> nodes = linq.ToList();
                nodes.Randomize();

                if (nodes.Count > 20)
                    nodes = nodes.GetRange(0, 20);

                udp.SendDatagram(new UdpItem
                {
                    Data = UdpOutbound.AckNodes(nodes.ToArray()),
                    EndPoint = item.EndPoint,
                    Msg = UdpMsg.OP_SERVERLIST_ACKNODES
                });
            }
        }