[Asterisk-Users] IAX2 and NATs that increment ports

[CuPoTKa]

Hello!

Does anybody tried to work with IAX2 (client side - softphones) behind a 
NATs that always increment ports?
At asterisk CLI I see:
     -- Registered '12345' (AUTHENTICATED) at a.b.c.d:22269
     -- Registered '12345' (AUTHENTICATED) at a.b.c.d:22289
     -- Registered '12345' (AUTHENTICATED) at a.b.c.d:22351

And that clients expects problems, for example if they try to reconnect 
with softphone - they can't connect any more, and so on.

Is there any workaround for such NATs (but we can't touch routers, only 
asterisk side or something).

--
Best Regards,
Alex