Hi All!
We did litttle research: - both behind the NAT = all OK = straeming over the rtpproxy - caller behind NAT (other public) = all BAD = no change in SDP (Connection Address) - rtp stream sending on private addres - calle behind NAT (other public) = all BAD = SDP has changed but only private IP address... public IP unchanged = so rtpproxy do not ralay one way stream
Can somebody (especialy IMS) please help us
Thanks
Best regards, Lubo
Hi Daniel,
thank you for answer. I think that parts of kamailio default config will not working with pcscf. (e.g. there is on pcscf no database - it has hss)
It partialy works with pcscf config -> it rewrites Connecition Infromation IP in SDP:
- sometimes with IP of rtpproxy (more often when both clietnts are
behind NAT)
- sometimes with public IP of NATed client (we are not sure why)
- or unchanged (when one client is behind NAT and other is public)
but this works only with Monster client, with Boghe IP is unchanged (shouldn't it be client independent ?).
Maybe someone from IMS help us.
Thanks all for any advice.
Best regards,
Lubo
Daniel-Constantin Mierla miconda@gmail.com:
Hello,
On 1/23/12 10:43 AM, trojak@st.fri.uniza.sk wrote:
Hi,
I am trying to make kamailio PCSCF working with rtpproxy (for NAT traversal). I would like to ask, if there is any tutorial for this, or if you can give me any advice.
Maybe IMS guys can give other hints, what is on public so far was summarized at:
I also have installed rtpproxy package; #!define WITH_NAT, and defined rtpproxy port in config file... But this is not working. I noticed, that in default config file of pcscf is nothing in routing logic with rtpproxy (or it is unnecessary ?), so I try to copy route[RELAY] route[NAT] route[RTPPROXY] modules from kamailio (no pcscf) config file... but also with no success.
Can you help me please ? What I am doing wrong ? Do you have any configuration working with rtpproxy ?
Be sure you can the nat handling routes for INVITES behind nat. You can follow the logic in the default config file and adapt it for you pcscf config. In summary should be like:
- invite comes in, test if it is from caller behind nat
- lookup location returns a branch flag if the calee is behind nat
(you have to set that branch flag for register request coming from users)
- if caller or callee are behind nat, engage rtpproxy for that call
and set a onreply route to update sdp for 18x/200 replies
- default config adds a Route header parameter for nated calls to
detect easily the natted situation for re-invites or bye
Cheers, Daniel
-- Daniel-Constantin Mierla -- http://www.asipto.com http://linkedin.com/in/miconda -- http://twitter.com/miconda
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trojak＠st.fri.uniza.sk