客户端 - 服务器程序：客户端可以轻松连接到服务器，但服务器无法响应，导致目标机器主动拒绝连接

问题描述

嘿，

我第一次尝试编写客户端 - 服务器程序。它在LAN网络上运行良好，但我不能让它在互联网上工作。



我可以使用以下代码轻松地将数据发送到服务器程序：

Hey,
I am trying to write a client-server program for the first time. It works fine on LAN networks but I can't get it to work over internet.

I can easily send data to the server program with the following code:

public static bool sendTo(IPEndPoint ip, String data)
{
    using (TcpClient c = new TcpClient())
    {
        try
        {
            c.Connect(ip);
            NetworkStream clientStream = c.GetStream();
            ASCIIEncoding encoder = new ASCIIEncoding();
            byte[] buffer = encoder.GetBytes(data);

            clientStream.Write(buffer, 0, buffer.Length);
            clientStream.Flush();
            c.Close();
        }
        catch
        {
            c.Close();
            return false;
        }
    }
    return true;
}

然后服务器必须使用相同的代码响应客户端，但它无法提供以下内容错误：



由于目标机器主动拒绝它，因此无法建立连接* IP *：* PORT *





我知道问题可以通过端口转发和更改路由器的设置来解决。但我可能会尝试尽快制作软件，用户应该能够以最少的配置使用该软件。所以...我想知道是否有人可以帮助我...



提前致谢，

eLe

Then server has to respond to the client using the same code but it fails giving the following error:

No connection could be made because the target machine actively refused it *IP*:*PORT*


I know the problem can be fixed with port-forwarding and changing the settings of router. But I'll probably try to make a software out of this soon and users should be able to use the software with minimal configurations. So... I was wondering if anyone can help me here...

Thanks in advance,
eLe

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