28 Mar
2005
28 Mar
'05
3:49 p.m.
Hi Sun Zongjun,
If Via has no received or rport parameters, SER will use the IP:port
advertise in Via to send back the reply - which is broken when you deal
with natted requests, since the Via port has the device port, but rport
has the NAT port.
Best regards,
Marian
孙宗君 <zjsun(a)biigroup.com> wrote:
Hi, All:
I just tested the SER+RTPProxy. My ser and rtpproxy
are located on the same machine with public ip address.
my SIP UA is behind the NAT device(Symmetric NAT). When
UA registered to SER, the SER send the response to the
port specified in the Via head parameters, not the
real port receiving the Registration request. After
I put the force_rport() in the ser.cfg, all will
works well. I wonder why the SER doesn't send the
response back to the receiving port. Whether that
conflicts the RFC3261 chapter 19.
I am glad to hear your advice and help
Best Regards
Sun Zongjun
--
Voice System
http://www.voice-system.ro