> has anyone managed to get IAX client (firefly 3rd party version)
> to work,
> where the *Server is behind single NAT,
> with port forwarding enabled on the NAT router, and
> the client behind double NAT ?
>
> clients behind single nat to * work fine.
Strange, I tested with iaxcomm and this was the setup :
Asterisk <-> NAT <-> Internet <-> NAT <-> NAT <->
NAT <-> iaxcomm (x3)
and everything was working.
I would suggest that you try with a different IAX client.
Take iaxcomm (http://iaxclient.sourceforge.net/iaxcomm/index.html)
or MediaX (http://www.marccharbonneau.com/asterisk/mediaxphone.php)
and try your test again.
hth