User`s guide

Other Technical Requirements
18 Installation and Migration Guide
You should choose a random number for the Administration Server to make it
harder for anyone to breach your server. When you configure your server, you
use the Administration Server’s port number. For example, for server
mozilla.com, the server’s URL could be
http://www.mozilla.com:2634/.
Make sure the port you choose isn’t already in use. On Unix and Linux systems,
you can check the file /etc/services on the server machine to make sure
you don’t assign a port number that is reserved for another service. If you
choose a port that is currently being used by another service, the installation
program prompts you for another port.
Note If you use Unix or Linux, and you choose a server port number lower than
1024, you must be logged in as root to start the server. After the server binds
to the port, the server changes from the root user account to the user account
you specify. If you choose a port number higher than 1024, you don’t have to
be the root user to start the server.