Can you offer any suggestions / tips / reminders on how I can do one of these following ideas:
Say a hosted PBX (SangomaOS) is working great with SIP 5060/UDP (chan_SIP). All phones register (and have 2-way audio).
Ref: Some clients face SIP ALG on their side (and/or) they cannot use port 5060/UDP on their side … (SIP mangling).
Is there a way (using either iptables or SangomaOS UI) … to do this:
I have not done this in a rather long time, and I forgot how to do it.
Have a 2nd port for chan_SIP 5060/UDP (bind to 2 ports)
so that we have either / both ports 5060/UDP and/or 8060/UDP working for chan_SIP.
Mable: have an iptables entry for IF traffic for port 8060/UDP arrives “forward” this (internally) to port 5060/UDP …
If we could do the above: we would have no need to bind to a 2nd port, or change anything on the hosted PBX for port 5060/UDP because iptables is doing simple port forwarding.
Thanks for your thoughts and tips.