TCP/IP客户端服务器无法通过Internet工作 [英] tcp/ip client server not working over internet

问题描述

我要在TCP/IP模式下设置一个小型客户端/服务器服务器，我使用VS2010，C#开发我的应用程序，我在Google上搜索了很多，可以找到一些源代码，但是它们都无法在其中工作互联网，我可以在自己的本地系统中得到一些答案，即运行服务器，然后侦听自己的本地主机(127.0.0.1)，然后发送一些数据(例如，使用telnet)，它可以正常工作，但是当我执行相同操作时通过互联网我什么也没有！我想使用端口80，因为我想发送/接收http数据，所以我已经测试了几个源代码，这是我使用的最后一个代码(它可以在telnet的localhost上工作)

I'm going to setup a small client/server server in TCP/IP mode, I use VS2010,C# to develop my apps, I've googled a lot and could find some source codes, but none of them work in internet, I can get some answers in my own local system, i.e. I run my server, then listen for my own localhost (127.0.0.1) then send some data (for example using telnet), it works fine but when I do the same over internet I get nothing! I want to use port 80, as I want to send/receive http data, I have tested several source codes, here is the last code I have used (and it works on localhost with telnet)

//服务器代码:

form_load()
    IPAddress localAddress = IPAddress.Parse("127.0.0.1");
                Socket listenSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            IPEndPoint ipEndpoint = new IPEndPoint(localAddress, 80);

            // Bind the socket to the end point
            listenSocket.Bind(ipEndpoint);

            // Start listening, only allow 1 connection to queue at the same time
            listenSocket.Listen(1);
            listenSocket.BeginAccept(new AsyncCallback(ReceiveCallback), listenSocket);
            Console.WriteLine("Server is waiting on socket {0}", listenSocket.LocalEndPoint);

            // Start being important while the world rotates
            while (true)
            {
                 Console.WriteLine("Busy Waiting....");
                Thread.Sleep(2000);
            }

        public static void ReceiveCallback(IAsyncResult AsyncCall)
    {
         System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
        Byte[] message = encoding.GetBytes("I am a little busy, come back later!");

        Socket listener = (Socket)AsyncCall.AsyncState;
        Socket client = listener.EndAccept(AsyncCall);

        Console.WriteLine("Received Connection from {0}", client.RemoteEndPoint);
        client.Send(message);

        Console.WriteLine("Ending the connection");
        client.Close();
        listener.BeginAccept(new AsyncCallback(ReceiveCallback), listener);
    }

发送数据(客户端)，我当然没用过这段代码，对吗?

send data (client), of course I haven't used this code, is it right?

        public static string SendData()
    {
        TcpClient client = new TcpClient();
        client.Connect(IP, 80);
        StreamWriter sw = new StreamWriter(client.GetStream());
        StreamReader sr = new StreamReader(client.GetStream());

        //if statement evalutes to see if the user has selected to update the server
        //" " = update server
        //"" = do not update the server
        //if (updateData.Equals(""))
        //{
        //    space = "";
        //}
        //else if (!updateData.Equals(""))
        //{
        //    space = " ";
        //}
        //Refrences stream writer, username variable passed in from GUI
        //space variable provides update function: "" = dont update. " " = update database.
        sw.WriteLine("h");
        sw.Flush();
        //data send back from the server assigned to string variable 
        //string recieved = sr.ReadLine();
        return "";

    }

我将在服务器(winserver 2008R2)中包含服务器代码，但是当前正在普通PC上对其进行测试，我在做什么错呢?我想从随机系统(具有随机IP)向服务器(我知道其IP)发送一些http数据包，该怎么办?tcp/ip是否有可能还是我应该做其他事情?它与静态IP有关吗?我当然应该有静态IP吗?我的Web服务器有一个静态IP，但我的客户端没有，这是问题吗?我认为在定义端口和IP时遇到一些问题，该如何设置?我的服务器有特定的IP，但是我不知道客户的IP，请您逐步向我解释一下吗?谢谢

I'm going to have the server code in my Server (winserver 2008R2) but currently test it in normal PCs, what am I doing wrong? I want to send some http packet from a random system (with a random IP) to my server (which I know its IP), what should I do? is it possible with tcp/ip or I should do something else? is it related to static IP? should I certainly have static IP? my web server has a static IP but my clients do not, is it a problem? I think I have some problem in defining ports and IPs, how should I set them? my server has a specific IP, but I don't know IP of my clients, would you please explain it to me step by step? thanks

推荐答案

此方案中最常见的两个问题:

The two most common problems in this scenario:

1. 确保服务器的路由器正在使用端口转发将HTTP请求从路由器转发到服务器.
2. 确保您要连接到服务器的公用IP地址，而不是其本地网络地址.

1. Ensure your server's router is using port forwarding to forward HTTP requests from the router to the server.
2. Ensure you are connecting to the server's public IP address, not its local network address.

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