How to know which ports are in use on a PC?

[deanbrown3d]

My network cameras and other networking hardware keeps instructing me to select different port numbers for various items, for security reasons. How do I know that a number I choose is not crucial for some other process or hardware?

For example I read somewhere that you can only use even numbers for some things - could be a bit of a gotchya there!

Thanks for any help!

Dean

[ChrissyBoy]

ports in current use:

netstat -an

common ports and so ones to avoid if you are looking for "non crucial" ports:

http://www.iana.org/assignments/port-numbers

The Dynamic and/or Private Ports are those from 49152 through 65535

[deanbrown3d]

Excellent! Thanks ChrissyBoy.

-Dean