Openfire and Jitsi Video and Voice

Hi guys!

Another question from someone that is just starting with Openfire.

I'm using Jitsi as my XMPP client for windows machines.

When I'm inside my network I can do voice and video calls.

I would like to know what do I have to do and permit on my firewall to allow this video and voice calls from outside.

I've:

Jingle Nodes Plugin (not very clear to me what it does)

Jitsi Video Bridge (not very clear to me what it does)

Presence Service

Thanks a lot!