Linux puskom-ProLiant-DL385-Gen10 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64

//etc/bindresvport.blacklist

 #
# This file contains a list of port numbers between 600 and 1024,
# which should not be used by bindresvport. bindresvport is mostly
# called by RPC services. This mostly solves the problem, that a
# RPC service uses a well known port of another service.
#
631	# cups
636	# ldaps
655	# tinc
774	# rpasswd
783	# spamd
873	# rsync
921	# lwresd
993	# imaps
995	# pops