I would like to enable our RealPresens 500 to make outbound H323 video calls only. No inbound allowed
Will allowing only outbound ports work?
Ports from the firewall FAQ
* TCP 1720 for the initial call setup
No, because you will receive packets on these ports also and if they are not open you won´t see and hear anything from the farsite. So you will have to open up Firewall In-and Outbound.
In addation you need to open ports TCP3230-3235 and UDP3230-3261, you also can see them in the Firewall-Settings in RPG´s GUI.