6 dec 2012 kl. 15:59 skrev Peter Dunkley <[email protected]>:

> On Thu, 2012-12-06 at 13:20 +0100, Daniel-Constantin Mierla wrote:
>> Address in firth path will be used to set $du anyhow, not sure what the flow 
>> token implies, but might be just done from config.
>> 
> 
> The flow token is the user part of the Path-URI and is an encrypted string 
> that indicates the source IP address, port, and protocol of the REGISTER 
> request.  So for NAT traversal purposes you want to send to the place the 
> flow token indicates, not what is actually in the host part of the Path-URI 
> (but only if the Path-URI has an ;ob parameter).  The idea is that even on a 
> single server system with clients that do not support outbound it should be 
> possible to "force outbound" so as to get this into the location table.
The flow token points to a flow saying that Kamailio should NOT parse the 
Contact URI and find a destination. It should find the proper connection.

> 
> Basically, when using outbound like this, the aliasing stuff in nathelper and 
> the received AVP/parameter/column in registrar and usrloc are obsoleted.
> 
> The useful parts remaining in nathelper will be nat_uac_test() and nat 
> pinging.  Although, for outbound capable clients nat pinging on the server is 
> not needed as the clients will send STUN requests to the SIP server anyway.  
> This means the when outbound support is complete, STUN should be enabled by 
> default on the Kamailio builds.
Yep.

Have sent e-mail to sip-implementors on the Q issue. It seems to me that Juha 
is right, it must be a mistake. 

/O
> 
> Regards,
> 
> Peter
> -- 
> Peter Dunkley
> Technical Director
> Crocodile RCS Ltd
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