[Kamailio-Users] No Audio with clients Behind NAT, audio is fine with clients using public IPs (Im using rtpproxy)

[Pascal Maugeri]

I've just setup a similar configuration as yours.

Could you check the SDP payload of the SIP INVITE that goes from kamailio to
the callee ? It should contains the IP address of rtpproxy and the port
allocated by the proxy.

Regards,
Pascal

On Thu, Jun 25, 2009 at 12:41 PM, rubenrojas - Trc.es <rubenrojas at trc.es>wrote:

> Hello everyone, this is my first post on this list,
>
> I have installed kamailio 1.5.1 and set up a vanilla default kamailio.cfg,
> then I have modified the cfg to activate mysql, domain, presence, nathelper
> and authentication with md5, everything works as supposed to, and the
> clients can register, send txt messages and talk to each other. The only
> problem is with the audio when the two clients are behind a NAT, the phones
> can make a call and it does ring too, but when you pick up there is no audio
> both ways.
>
> when the phones have a public IP everything goes fine, it also works when I
> use a Linksys PAP2T whith the options to "Insert VIA received", "Insert VIA
> rport", "Handle VIA received", "Handle VIA rport" and "NAT mapping enable"
> turned on, with the Qutecom softphone works too. [...]
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