SIP ALG off and consistent nat on. Same setup on all three carriers on the Firewall. We have 50+ using Sip trunks. Network guys here know the routine on that.


So do you port forward them to the Carrier? The ports originate from the system and it comes back from the carrier on something else.

I will pull a trace tomorrow(hopefully, might be Monday). The last one I did the header looked right leaving but the RTP never got back to us.