Hi, I have an issue with a firewall that doesn't handle NAT'ing when using two different providers on the 3CX. The problem is that the 3CX uses the same IP and source port (5060) for both providers when signaling with them. This confuses the firewall (doing the NAT, it is a Sonicwall), and it looks problematic to get it to work like this. When using standard SIP-devices with different LAN IPs and different source ports (5061, 5062 and so on), everything works fine. Is it possible to set up the 3CX server to use e.g. UDP port 5060 as the source port for one provider and 5061 as the source port for the other service provider? If anyone has tips on how to configure a Sonicwall 3060 to handle this the "normal" way I would also appreciate that ;-) Thanks!