如何使用php在NAT后面获取IP? [英] how to get ip behind NAT using php?

问题描述

是否可以在PHP中检索NAT后面的IP? 我正在使用$_SERVER["REMOTE_ADDR"]获取客户端的IP地址.它没有提供位于NAT后面的客户端的确切IP地址.

Is it possible to retrieve IP behind NAT in PHP? I am using $_SERVER["REMOTE_ADDR"] for getting IP address of the client. It's not giving exact IP address of the client which is in behind NAT.

推荐答案

否，不可能. NAT表示网络地址转换-数据包的IP地址是在NAT设备上重写的，因此，只要您的服务器知道，公用IP地址就是唯一的IP地址.

Nope, not possible. NAT means Network Address Translation - the IP address of the packets is rewritten at the NAT device, so the public IP address is the only one, as far as your server knows.

但是，您可以使用一些技巧-例如使用Java Applet检查内部IP地址.请参见:从Java applet获取正确的本地IP地址

However, you can employ some tricks - such as checking for the internal IP address using a Java Applet. See this: Get the correct local IP address from java applet

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