Hi José,
'rport' VIA param is to be used in NAT situations. As the VIA hdr is
used for routing back the replies, if the caller is behind nat (and its
VIA with a private IP), the routing back of the reply to it will not be
possible.
The way rport works it is very simple - this param (together with
"received") are added to the top most VIA hdr if this VIA indicates a
different IP:port than the src ip:port on net level. The received and
rport are added to contain the layer 3 IP and port (which can be used
later for routing back the reply).
Regards,
Bogdan
On 07/06/2011 01:55 AM, José Pablo Méndez Soto wrote:
Hello,
Can anybody explain how the rPort works in conjunction with STUN?
I have gone through the RFCs but can't make sense out of a packet
capture I have over here. If possible, I would like someone to explain
how the layer 3 and 5 IP addresses will flow and be re-writed when SIP
works behind a NAT (Just one side behind NAT and the other publicly
available lets say).
Thanks in advance,
--
Bogdan-Andrei Iancu
OpenSIPS eBootcamp - 2nd of May 2011
OpenSIPS solutions and "know-how"
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