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Re: Free TCP/IP port numbers?




Ok, I will not waste my time to argue over obvious things.
You won't get
ports more "default" than from this list. Protocols, ports and service names are registered for a reason.
Ex: If you install MySQL server it will be configured to listen on port 3306\tcp by default on any OS, be it Debian, RHEL, or Windows.



On 01.10.2017 06:40, Victor Porton 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.