Dear Thelma,

Yes. Asterisk listen on port 4569 UDP on default config.

Please, look at the Asterisk logfile, for clues about your issue. Or enable
IAX2 debug vía Asterisk CLI.

Other ideas:

* Check that your server firewall permit UDP port 4569 incoming traffic.

* Run tcpdump over the network interface of your server where the
registration packets suppose come in. Look ir at least the softphone
registration request are reaching the server.

* Check if the credentials configured un the softphone mach the credentials
configured on the server.

Cheers

El 5 jun. 2017 9:48, <the...@sys-concept.com> escribió:

> Does asterisk listen on port 4569 by default?
>
> I'm running version Asterisk 11.25.1 and have a problem registering
> Zoiper (IAX) to Asterisk.
> I'm getting an error:
> Registration refused
>
> --
> Thelma
>
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