[Kamailio-Users] [SR-Users] force_rtp_proxy() vis-a-vis BYE

[Klaus Darilion]

Iñaki Baz Castillo schrieb:
> 2009/7/8 Klaus Darilion <klaus.mailinglists at pernau.at>:
>>> I don't understand this. PATH is required when a registration is done
>>> through an outbound proxy, so the registrar routes request for that
>>> AoR using also through the outbound proxy (the RURI is the Contact of
>>> the REGISTER but the request is sent to the OBP.
>> E.g.:  client <--->OBP<---->Registrar
>>
>> If the Registrar does the NAT traversal, the NAT traversal mechanism must
>> take into account the PATH, that means either:
>>
>> - send OPTION requests to the client using a pre loaded route via the OBP
>> - send OPTION requests or emtpy CRLF packets with spoofed source IP (the IP
>> of the OBP)
>>
>> If the OBP does the NAT traversal, the NAT traversal mechanism need not take
>> care about PATH because there is no SIP proxy between the client and the
>> OBP.
> 
> Yes, but what I mean is that in the above escenario PATH is required
> in order client to receive calls from Registrar (forget NAT now).

of course, the registrar always needs to support PATH. But the
NAT-traversal mechanism only needs to support NAT if it is not running
on the OBP, but behind the OBP.

regards
klaus