[Kamailio-Users] Request uri vs registered contact

[Olle E. Johansson]

12 aug 2009 kl. 11.41 skrev Alex Balashov:

> Olle E. Johansson wrote:
>
>> ...and I've seen implementation who refuse to accept the registered  
>> contact as a request URI...
>> There's some vague security thinking behind a device who doesn't  
>> accept any r-URI from, but only the registered contact. Is some  
>> cases, the contact indicates a line or something in the device, so  
>> it needs the full contact to be able to provide the user with the  
>> proper interface reaction for the incoming call.
>
> Yep.  It's not stupid;  the logic is quite clear, and the behaviour  
> is as intended.  It just poses a problem for trunking and/or  
> multiple DIDs where the device is expected to potentially route a  
> call differently based on the number used to reach it.

I did not say it was stupid, but it's not related to security...

Anyway, there's some work in the IETF to handle the register for  
multiple DID's, since the way it's used now clearly violates what's in  
the RFCs and there is an obvious need to register for "SIP trunks".

/O