When I got my Vonage or Sunrocket account I did not have to mess around with port forwarding on my NAT firewall. I plugged in the gizmo and I was off. How do companies like vonage and sunrocket configure their systems to not have to mess around with port forwarding? Do they hard code something at their service center end?? Just curious as the majority of the issues with the PBX seem to be firewall related. Thanks!