[Serusers] stun - Grandstream

Jiri Kuthan jiri at iptel.org
Mon May 31 17:45:49 CEST 2004


That may or may not work depending on type of NAT you are using. See
Applicability Statement in STUN RFC3489.

Generally, more than one STUN device behind a single NAT increases 
likelihood of failure. The devices may compete for the same port number
which makes some NATs change their behaviour in terms of STUN taxonomy
from asymmetric to symmetric (thanks to Andrei for having debugged this 
tricky case). Then nothing will work, since the phones rely on 
asymmetric behaviour which does not hold. Some NATs also discard packets 
from local interface to its public IP address which breaks calls between 
two devices behind the same NATs.

-jiri

At 05:42 PM 5/31/2004, Ri Liang wrote:
>Hello Martin,
>
>Please advise if you have tested with more than 2 Grandstream devices in the
>SAME Nat ?
>
>Ri Liang
>
>------------
>Date: Sun, 30 May 2004 16:16:17 -0700 (PDT)
>From: Martin Winter <mwinter at noaccess.com>
>Subject: Re: [Serusers] stun - Grandstream
>To: Peter Boot <peter.boot at ihug.com.au>
>Cc: serusers at lists.iptel.org
>Message-ID: <Pine.NEB.4.60.0405301614070.7226 at picard.noaccess.com>
>Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
>
>On Sun, 30 May 2004, Peter Boot wrote:
>> Has anyone been able to get the Grandstream HT486 to work with MyStun or
>any
>>
>> other opensource stun server ?
>
>No Problem here.
>I use the HT486 with stun 0.91 (Feb 21 - the latest release) from
>vovida.org
>
>Source is at http://sourceforge.net/projects/stun/
>
>- Martin
>
>
>
>
>
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--
Jiri Kuthan            http://iptel.org/~jiri/ 




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