Hi,
My VOIP system allows customers to set an sip destination they wish and all works great. My system is setup on the SRX as a static NAT, but I have come across an issue where if the B leg of the call ends the call the BYE is not received by our VOIP system. I believe that the issue is UDP timeout.
So on the initial SIP signalling, all is ok as my system initiates the communications via an INVITE to the external system. NAT is allowing them to respond. But for calls that are exceeding the timeout when that external server sends a BYE maybe 20+ minutes later to close the call the Juniper has long since closed that ability off.
What do people do in this instance, set the UDP timeout for 3 hours or so? Adding the customers IP into my firewall isn't an option as these are done on the fly by the customer and can change at any time.
Thanks