Some time ago I proposed that Tor flags some ports as being unacceptable as ORPort[1], but this did not gather much of a momentum.
A port is a number. None of them is special. I really don't see any reason to discriminate any.
Oh but they are special in a lot of cases: http://www.iana.org/assignments/service-names-port-numbers/service-names-por...
-kali-
-- Moritz Bartl https://www.torservers.net/
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