RE: Guidance needed on well known ports

The whole idea of fixed ports is broken.

The idea that there are only 1024 or even 65535 Internet applications is
broken. 

The Internet has a signalling layer, the DNS. Applications should use it.
The SRV record provides an infinitely extensible mechanism for advertising
ports.

Fixed ports do not work behind NAT. Anyone who wants to deploy IPv6 would be
well advised to pay careful attention to that restriction. SRV ports work
just fine behind a NAT.


IANA should be told to close the well known ports registry. Applications
should use DNS SRV records for service location.

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