NAT devices not translating privileged ports

4 Jun 2021

      Folks,

While discussing port randomization (in the context of 
https://www.ietf.org/archive/id/draft-ietf-ntp-port-randomization-06.txt
), it has been raised to us that some NAT devices do not translate the
source port if the source port is a privileged port (<1024).

Any clues/examples of this type of NATs?

Thanks!

Regards,
-- 
Fernando Gont
Director of Information Security
EdgeUno, Inc.
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