The answer is correct - IANA maintains the list of ports. You may also look at the services file nmap maintains or ask showdan what it's seen publicly if you want a public popularity contest of ports.
As it is, I'm pretty sure you're over engineering this. Have a config file that has a port range option and be done with it. Also, you didn't mention needing <1024 so pick a port and be done with it (what everyone else does). Lastly, certain ports are so old, their intended services shouldn't be online anymore (see the first 20 ports or 90-110 - off the top of my head - not sitting here and going through them) or if the service probably won't be used in ICS or on a box designed to be an internet backbone, use one of those. On Sep 30, 2017 21:50, "Victor Porton" <por...@narod.ru> wrote: > Alexander V. Makartsev wrote: > > > 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. > > The list of port numbers you pointed to me is a subset (or at least not a > superset) of the full list used by Debian packages. > > Assuring that my port is not in this IANA list is not enough to ensure that > my port number will not clash with a port number used by a Debian package > (by default). > > So your answer to my question is wrong. > > > 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. > > -- > Victor Porton - http://portonvictor.org > >
