i cant receive pocket

Question

hi guys

i want write a software to manage internet bind width in our office . for test this i write to part software(server and client working by tcp on port 80).

when i sent message from client to server it work but when i sent massage to ip out of my network server didnt receive.

i set client gateway to server ip.

server side code :

             int servPort = 80;

            Socket server = null;

            try
            {
                // Create a socket to accept client connections
                server = new Socket(AddressFamily.InterNetwork, SocketType.Stream,
                                    ProtocolType.Tcp);

                server.Bind(new IPEndPoint(IPAddress.Any, servPort));
                server.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.HeaderIncluded, true);
                server.Listen(BACKLOG);
            }
            catch (SocketException se)
            {
                Console.WriteLine(se.ErrorCode + ": " + se.Message);
                Environment.Exit(se.ErrorCode);
            }

            Console.WriteLine("Server in Running ...");

            byte[] rcvBuffer = new byte[BUFSIZE]; // Receive buffer
            int bytesRcvd;                        // Received byte count

            for (; ; )
            { // Run forever, accepting and servicing connections

                Socket client = null;
                Console.WriteLine("Ready ... ");
                try
                {
                    client = server.Accept(); // Get client connection

                    Console.Write("Handling client at " + client.RemoteEndPoint + " - ");

                    // Receive until client closes connection, indicated by 0 return value
                    int totalBytesEchoed = 0;
                    while ((bytesRcvd = client.Receive(rcvBuffer, 0, rcvBuffer.Length,
                                                       SocketFlags.None)) > 0)
                    {
                        client.Send(rcvBuffer, 0, bytesRcvd, SocketFlags.None);
                        totalBytesEchoed += bytesRcvd;
                    }
                    Console.WriteLine("echoed {0} bytes.", totalBytesEchoed);

                    //client.Close();   // Close the socket. We are done with this client!

                }
                catch (Exception e)
                {
                    Console.WriteLine(e.Message);
                    //client.Close();
                }

Answer 1

To diagnose this, can you run a "netstat -nab" while trying to connect local and see if the addresses being used matches (e.g.: IPv4 or IPv6 address?)