I have a SIP soft-phone set-up using Linphone as the client, which used to work, but stopped working at some point in the last few months.
Now, calls appear to connect OK, I can see when the recipient has answered the call, but I don’t get any audio.
On the IPFire firewall log, I’m seeing a DROP_INPUT from one of my provider’s RTP server IP addresses to UDP port 7078. This is the port number configured in Linphone as the Audio RTP UDP port.
Has this stopped working as a result of the deletion of ALG from IPFire? I don’t have any record of when I updated to 155 but it is possible that the timing is coincident.
If it is that, what do I need to do on IPFire to get Linphone working again? I don’t need to receive inbound calls, only make outbound ones.