sockets - Why no "what's my ip" well-known port/service? -

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I know that some web sites that provide this service but considering that everybody lives behind NAT every day Is it not standardized on a port and anyone is provided as a service to run it? It is useful at least one resonance, time of day or "quote of the day" server and easy to implement.

Or is there anyone who knows me? Is any proposal / RFC in progress?

EDIT: Thanks for everyone for a vibrant and thoughtful discussion.

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

Related threads on stack overflow refer to all STUNs:


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