WCF net.tcp绑定服务使用

我有以下WCF客户端代码来使用WCF服务：

static void Main(string[] args)
        {
            IService1 vService;
            NetTcpBinding b = new NetTcpBinding();
            b.Security.Mode = SecurityMode.Message;
            b.Security.Message.ClientCredentialType = MessageCredentialType.Windows;

            EndpointAddress vEndPoint = new EndpointAddress("net.tcp://115.127.1.226/myservice/");
            ChannelFactory<IService1> cf = new ChannelFactory<IService1>(b, vEndPoint);

            vService = cf.CreateChannel();
            try
            {
                Console.WriteLine("Result from the system " + vService.HellowWorld());
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error Occured while connection establish to " + vEndPoint.Uri.ToString());
            }
            Console.ReadKey();

        }

尝试使用 ServiceBusEnvironment.SystemConnectivity.Mode=ConnectivityMode.Http

Could not connect to net.tcp://115.127.1.226/myservice/. The connection attempt lasted for a time span of 00:00:21.0282028. TCP error code 10060: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
115.127.1.226:808.