在不同的网络上使用套接字通信 [英] Use Socket-communication over different networks

问题描述

你好，stackoverflowers！

Hello fellow stackoverflowers!

我目前正在开发该应用程序，该应用程序应该能够在设备之间进行通信.我发现此很酷的指南如何使用Socket进行此类通信.而且有效！..ish.

I'm currently developing this app that should be able to communicate device-to-device. I found this cool guide on how to use Socket for that kind of communication. And it worked! ..ish.

我的问题是，仅当两个设备连接到同一Wi-Fi时，它才能工作.糟透了...因此，如果设备A是服务器&设备B是客户端，我使用内部IP地址(例如192.168.1.blahblahbla)，即可正常工作.

My problem is that it only works while the two devices is connected to the same Wi-Fi. Which sucks... So if device-A is the server & device-B is the client, and I use the internal-IP address (like, 192.168.1.blahblahbla), it works.

-That's awesome, then why're complaining bro?

好吧，我希望能够连接到设备A的外部IP，即真实IP(例如94.254.blabla.blabla).所以我对你们的问题是，我该怎么做?我该如何做才能做到这一点?

Well, I want to be able to connect to device-A's external-IP, the real IP (like 94.254.blabla.blabla). So my question to you guys, is how do I do that? How can I do something that can make this happen?

所有帮助都会得到体现，预先感谢.

All help will be appriciated, thanks in advance.

很高兴，芒斯.

推荐答案

这更像是一个网络问题，但答案是没有区别.您唯一需要面对的不同就是防火墙保护.如果您可以使用私有IP而非公共IP连接到设备，则意味着存在某些阻止您连接的信息(可能是防火墙或路由器的防火墙).

This is morelike a networking question, but the answer is that there's no difference. The only different thing you have to bare with is with a firewall protection. If you can connect to a device using private IPs and not public, this means there's something blocking your connection (probably a firewall or the router's firewall).

您必须确保在目标设备上连接的端口没有被阻塞.其余的都一样.

You have to make sure the port you're connecting on the destination device is not blocked for your connection. The rest is the same.

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