[SR-Users] Kamailio without sound, what to do?

[Henrik Aagaard Sørensen]

I'm trying to setup a proxy and have installed rtpproxy.

Trying to start it via: rtpproxy -l _your_public_ip_ -s udp:localhost:7722
throws the warning:
rtpproxy: running this program as superuser in a remote control mode is
strongly not recommended, as it poses serious security threat to your
system. Use -u option to run as an unprivileged user or -F is you want to
run as a superuser anyway.

Will Kamailio accept WITH_NAT etc. if I run rtpproxy with -u as an unprivileged
user?

On Tue, Jul 26, 2011 at 9:32 AM, Klaus Darilion <
klaus.mailinglists at pernau.at> wrote:

>
>
> Am 26.07.2011 09:23, schrieb Henrik Aagaard Sørensen:
> > I'm a newbee in the world of Kamailio.
> >
> > I've managed to setup a fresh installation of Kamailio, with
> > authentication etc. (with help from some great guys on this
> mailing-list).
> >
> > Everything seems to work with registers, calls etc. except that there is
> > no sound on my calls.
> >
> > How do I figure out what the problem is?
>
> If you want to figure out the problems yourself then a packet sniffer
> (tcpdump, wireshark, ngrep) is your friend. Basically you watch out for
> certain kind of packets which should be there, watch where they are sent
> to, and if this is correct (compare with IP adresses signaled in SIP
> payload).
>
> "No sound" is usually a NAT problem which can be solved by activating a
> media relay (e.g. rtpproxy) and rewriting the SDP to route the media
> stream via the rtpproxy.
>
> For message inspection I prefer ngrep:
>
> Just for the SIP traffic:
> ngrep -d any -P "" -t -q -Wbyline port 5060
>
> For SIP traffic and RTP (usually both use UDP):
>
> ngrep -d any -P "" -t -q -Wbyline "" udp
>
>
> Check out the SDP (body of INVITE and 200 OK) and verify if the IP
> addresses signaled in c= line and port in m= line are correct (public
> vs. private IP).
>
> Verify also if you see UDP/RTP packets sent by the SIP clients.
>
> If the clients are behind NAT, activate NAT traversal in the config:
> define WITH_NAT (or similar)
>
> regards
> Klaus
>
>
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