为什么没有“我的IP是什么"?知名的港口/服务? [英] Why no "what's my ip" well-known port/service?

问题描述

我知道有些网站可以提供此服务，但是考虑到如今这些人几乎都生活在NAT之下，为什么不将其标准化在端口上并作为服务提供给想要运行它的人呢?它至少与回显，白天或每日报价"服务器一样有用，并且易于实现.

I know there are some web sites that provide this service but given that pretty much everyone lives behind NAT these days, why isn't this standardized on a port and provided as a service to whomever wants to run it? It's at least as useful as an echo, daytime or "quote of the day" server and as easy to implement.

或者我所知道的存在吗?是否有任何提案/RFC?

Or does one exist that I am aware of? Any proposals/RFCs in progress?

感谢大家进行了生动而周到的讨论.

Thanks to everyone for a lively and thoughtful discussion.

推荐答案

在 RFC 5389

当然，供应商必须支持标准才能使它们有用.

Of course, vendors have to support standards to make them useful.

StackOverflow上的相关线程.他们都提到STUN:

Related threads on StackOverflow. They all mention STUN:

• 以编程方式发现公共IP
• 尝试使用INATExternalIPAddressCallback获取NAT的外部IP地址C#
• 在POSIX C中获得自己的外部IP地址

• Discovering public IP programatically
• Trying to get NAT’s external IPAddress with INATExternalIPAddressCallback in C#
• Obtaining Own External IP Address in POSIX C

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