I have Polycom RPG 500
RealPresence Group 500
System Software : Release - 4.0.0.1-70908
We use a VPN connection to join our main conference room now we have to change the firewall and allowed all required ports as mention in Screen-Shots but facing an issue that calls get dialed successfully but at the main conference room side, AUDIO/VIDEO not received however on VPN dial side AUDIO/VIDEO both received.
We use Barracuda F80 now and it works fine on F280.