Joshua C. Colp

Hostnames don't resolve to interfaces. If you mean it's using split DNS to resolve internally to loopback, but externally to a public IP address that is what I tried. If...

And there's the missing piece, it's binding to 127.0.1.1. I was binding to 127.0.0.1 because that is what is on my loopback interface. By default chan_iax2 binds to "0.0.0.0" which...

At least, that is what caused it to work for me.

Actually it does receive the traffic, but something gets confused - possibly chan_iax2 itself. Binding explicitly on 127.0.1.1 does cause it to work though as I mentioned.

I don't know IAX2, I can't comment on that.

I would suggest actually spending further time investigating the root cause beyond my high level analysis/experimentation. Placing a warning message without understanding the true context can cause confusion.

Alpine is not a supported platform for Asterisk for the project. Any support for it comes from any community member who has an interest in it or wishes to provide...

I don't see that as a problem. If you're changing to any mainline branch you should rerun bootstrap.sh

If the underlying cause appears to be that, then you can edit this issue if you wish.

As it is, no.