如何使用动态外部IP地址在Internet上建立客户端和服务器之间的连接？ C＃ [英] How to establish a connection between a client and server on the internet with dynamic external ip-address ? c#

问题描述

我有一台带有动态外部IP地址的服务器。如何在互联网上创建连接？之后，客户端知道外部IP地址，必须连接。



我尝试过：

I have a server with dynamic external IP-address. How to create a connection on the internet ? After that, the client, knowing external IP-address, has to connect.

What I have tried:

UPnPNAT upnpnat = new UPnPNAT();
            Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); 
            IPAddress ipAddress = null; 
            IPEndPoint Addr = null; 
            NATUPNPLib.IStaticPortMappingCollection mappings = upnpnat.StaticPortMappingCollection;
            mappings.Add(20131, "TCP", 20131, "46.175.163.14", true, "Test Open Port");
            Addr = new IPEndPoint(IPAddress.Parse("192.168.0.111"), 20131); //"localhost" = 127.0.0.1

            s.Bind(Addr);

            s.Listen(10);

推荐答案

客户端必须知道地址。我建议你改变一个静态的动态。否则，将ip地址放在配置文件中，然后在每次更改时更新，这样您就不必每次都重新编译代码。

The client will have to know the address. I suggest you change your dynamic one for a static one. Otherwise, put the ip address in a config file and then update that each time it changes so you don't have to recompile the code every time.

除了Ryan发布的解决方案之外，您还可以使用动态DNS - 维基百科，免费的百科全书 [ ^ ]服务。大多数互联网路由器和调制解调器提供了一个选项，可以在它发生变化时将动态IP地址传递给这样的服务。

Besides the solution posted by Ryan you can use a Dynamic DNS - Wikipedia, the free encyclopedia[^] service. Most internet routers and modems provide an option to pass their dynamic IP address to such a service when it has changed.

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