[asterisk-users] IAXy behind NAT, unable to transfer?

[Jeff Iddings]

Joshua Colp wrote:
> ----- Original Message -----
> From: Jeff Iddings
> [mailto:jeff at iddings.us]
> To: Asterisk Users Mailing List - Non-Commercial
> Discussion [mailto:asterisk-users at lists.digium.com]
> Sent: Sat, 05 Aug 2006
> 17:15:58 -0300
> Subject: Re: [asterisk-users] IAXy behind NAT, unable to
> transfer?
> 
>>> On 8/5/06, Jeff Iddings <jeff at iddings.us> wrote:
>>>> IAX Provider--> Asterisk/NAT Firewall--> IAXy (192.168.0.x)
>>>>
>>>> When a call comes into the Asterisk box, it then rings the IAXy.
>>>> When the IAXy is answered, I get..
>>>>
>>>> -- IAX2/homeiaxy-6 answered IAX2/teliax-4
>>>> -- Channel 'IAX2/teliax-4' unable to transfer
>>>> -- Channel 'IAX2/homeiaxy-6' unable to transfer
>>>>
>>>> This is the same behavior when calling outbound, and I've tried a few
>>>> other calls to other IAX-capable boxes -- same results. I'd ideally
>>>> like the IAXy to talk directly to the IAX provider and bypass the
>>>> Asterisk box after the call is setup.
>>>>
>>>> I presume this is just a limitation of IAX and/or the IAXy, but maybe
>>>> someone could advise me if that is actually the case?
>>>>
>>>> Regards,
>>>>
>>>> Jeff
> 
> This is actually perfectly normal behavior depending on what sort of NAT is in place and what happened. Essentially what IAX2 does is before actually transferring the connection directly, it will make sure that it will work. The IAXy talks to Teliax, and Teliax talks to the IAXy. What happened is that they weren't able to talk directly to eachother so they kept the connection through your Asterisk machine.
> 
> Joshua Colp
> Digium

Fair enough, but my IAXy should be able to talk directly to Teliax..  in fact, I just confirmed that. So what's up?