Hello

I have a PBX behind NAT.
Thus I advertise the public IP, and forwards the port to my PBX.

listen=LOCALIP:5070 advertise EXTERNALIP:5070

Now clients can connect to the PBX from the Internet. And also inside
the LAN, because I have enabled NAT loopback.

However some customers sysadmins complains that NAT loopback is a
security risk. I have not been able to find any exploits of this, but
the sales and support people asks if it is possible to remove this NAT
loopback requirement.

I could look at $rd and if it is local, then I could  advertise LOCALIP.
I found set_advertised_address("LOCALIP");

set_advertised_address however only seems to modify the latest Via
header, not the Record-route, and audio neither works.

Could I do something to make this work, or is it a dead end?


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