Hello,
stun works pretty well for non-symmetric nat. If there is symmetric nat,
then you need a rtp relay (e.g., rtpproxy) or turn server.
Cheers,
Daniel
On 2/28/13 5:48 PM, Khoa Pham wrote:
Hi David, I already read all of these. But the problem seems
contradict with what I read
On Thu, Feb 28, 2013 at 9:56 PM, David <kamailio....@spam.lublink.net
<mailto:kamailio....@spam.lublink.net>> wrote:
Hello,
Look on Wikipedia and read the articles for SIP, RTP, NAT and STUN.
The answer to your question can be found in the above articles.
David
On 13-02-27 10:26 PM, Khoa Pham wrote:
Hi, I have Kamailio as SIP server and RTP server. Client is PJSIP.
I read that STUN is for non-symmetric NAT, and RTP server is for
symmetric NAT.
Supposed A calls B.
If A, B both use symmetric NAT and STUN, they cannot hear each other
If A or B use non-symmetric NAT and NOT using STUN, they cannot
hear each other.
Why is that?
I read
http://tools.ietf.org/id/draft-takeda-symmetric-nat-traversal-00.txt for
Prediction Failure, is that related to this problem ?
--
Khoa Pham
HCMC University of Science
Faculty of Information Technology
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Khoa Pham
HCMC University of Science
Faculty of Information Technology
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