Firewall -

How good is the Sangoma Responsive Firewall? I have a watchguard M500 Firewall should I create firewall rules to allow legit traffic through or should i port forward everything to the PBX and let the responsive firewall deal with the threats. We have multiple people registering from known locations ( Static IP’s ) and some with Dynamic IP’s. Is there a list of ports that I need to know to forward to the PBX, I am not 100% sold on leaving all ports been forwarded to the PBX. Any input will be greatly appreciated.

Well this would be a good reference then