Hi, I just got my pbx cloud and i'm having trouble configuring the box. I'm running Elastix 4.0 using CFS has Firewall. When I make a call, I wont receive voice, all needed port are open on the firewall its just a miss configuration in the [login to view URL] which I need to prepare to work with NAT. If I desable the firewall everythings start working just fine. Also I need a small assistence setting the call center feature.