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....
(https://www.snbforums.com/attachments/1597613552796-png.25492/)
OPNsense Port Forwards
https://ibb.co/jG0mMMY
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.