- A backend webserver that is called by the world-visible webserver.
- A static NAT table for the public to use a port number to specify which server they are connecting to.
- A software that is developed by the company that will not be published, but used in-house.
I was just wondering if there was a standard section of port numbers that should be used. For example when it comes to DNS testing, or non-world-readable domains, there are items in RFC 2606 such as