There is official list of all registered port numbers: https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.txt
You can choose any port that is not in the list, to be sure they won't clash. On 01.10.2017 06:04, Victor Porton wrote: > We are going to install a range of software on a Debian Linux installation. > Because we run the same software (such as Celery) several times, we need to > use port numbers different than the standard Debian port numbers chosen by > default (because we can't run more than one instance of a server with the > same port, and thus using the standard port number for all servers would > fail). > > How to choose TCP/IP port numbers for server software we run in such a way > that they don't clash with "standard" Debian port numbers? > > In Debian are there any ranges of port numbers dedicated (so that they > wouldn't clash with "standard" that is used by default port numbers) for > servers configured by users? > > Note that we run (at least some of) our software not as root, so we can't > use ports below 1024. >
