Re: [Siproxd-users] Using iptel service ...

[PAZ <rj...@ef...>]

On Thu, 3 Apr 2003, Thomas Ries wrote:

> Hi,
> 
> On  1 Apr, PAZ wrote:
> > 
> > Hi:
> > 	I have no luck trying to use iptel.org service with 
> > messenger. I am behind a Linux ipchains based NAT, and I opened all 
> > suggested ports in README file. With tcpdump, I see iptel.org is trying to 
> > reach my external NAT interface, port 8451 udp. Anyone has any idea about 
> > this port number?.
> 
> Might this be the RTP stream (a lot of UDP packets)? If so, this would
> indicate that messenger has not registered to siproxd and still sends
> its SIP requests directly.
> The local UA (-> messenger) must register at siproxd, so siproxd can
> act as masquerading proxy in between.

OK. I already had success when I was sing in to Iptel. The problem now is 
that the station behind the NAT firewall can establish a voice session to a 
remote user, and he can listen everything I said, but I can't hear him. I 
presume this is a firewall rule related issue, but I can't positively 
affirm this. Any ideas?.

Thank you.

> 
> > 
> > 	Another question: siproxd does not have to listen in port 
> > 7070:7080 also? (or maybe I understand something wrong about that ...).
> > 
> 
> Siproxd will dynamically allocate ports in the range 7070:7080 (and
> start listening) for each RTP stream that is started during an INVITE.
> Therefore, if no SIP sessions are active, siproxd will *not*
> listen on the ports 7070:7080.
> 
> > 	Thank you in advance.
> > 
> 
> Regards,
> /Thomas
> 
> 

-- 
Roberto Paz

"The box said, 'Requires Windows 95 or better', so i installed Linux"
TKK 5