RE: [Serusers] NAT with SER and ASTERISK, strange behaviour

Have you enabled symmetric nat in the Cisco phone? This is under the setting "NAT == YES"? Dave -----Original Message----- From: serusers-bounces(a)iptel.org [mailto:serusers-bounces@lists.iptel.org] On Behalf Of Morten Kuehl Sent: 14 September 2004 10:50 To: serusers(a)lists.iptel.org Subject: RE: [Serusers] NAT with SER and ASTERISK, strange behaviour Hi, I am aware of the difference between media and signalling as well as the way an rtp proxy works. But still do I think that this is a different case: When using asterisk, xlite does symetric rtp streams aka. sends from port 8000 and listens on port 8000. The port is therefore open on nat and udp pakets can travel through the nat with the correct public ip in the sip messages. When I do have the setup with ser and the sip messages look the same, aka. xlite says "I am listening on 8000 on public ip" and send via 8000 to the cisco phone which says "I am listening on port x on my ip". So there should be no need for an rtp proxy as the rtp stream from xlite is symetric and the nat port is open. But still there is no incoming audio. I can understand that with clients like MS messenger there is a need to rewrite the sdp and sip messages. So where is the problem in my szenario, what little magic does asterisk do that I do not see in the sip messages??? Cheers Morten the through _______________________________________________ Serusers mailing list serusers(a)lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers