Avaya 9806 IP Phones - No Sound?

[voyto]

Hi All,

At work I've just swapped out our old ASUS router (Running Merlin firmware) for an OPNsense build (23.1.1)

I copied over all port forward from what we had before and enabled port reflection to get most things working as they were before. The one thing I have an issue with is our IP Office remote workers. With all the old port forwards in place, they are able to connect, make a call but either participant on a call can't hear anything.

I believe the phones create their own H.323 connections.

I'd assume this is something to do with the firewall blocking RTP ports?

The old router had WAN-NAT Passthrough. Is this maybe why it worked before? Anyone know how I can replicate this with OPNsense?

Image from ASUS (Merlin) NAT Passthrough....


OPNsense Port Forwards
https://ibb.co/jG0mMMY

[voyto]

Fixed myself! Thought I'd post in case anyone is to stumble upon this in the future....

In OPNsense, I simply had to create an OUTBOUND NAT rule, with the IP Office as the source and everything else as any.