Re: [Linphone-users] Linphone 3.0 + STUN

[Alastair Johnson]

Maxim Podbereznyi wrote:
> Sorry, but I forgot to tell that both of my Linphone-phones are behind a 
> firewall. That is why I'm asking about STUN parameters. The phones 
> register at SIPNET with some unique SIPID, which can be used for calling 
> to phones from PSTN or other softphones. Direct call with IP between 
> them works fine. As mentioned previously problems begin when I try to 
> use SIPID from SIPNET to call to a neighbor linphone. Seems like RTP 
> ports are not mapped well in SIP messages.

There are situations where STUN can't help you. IIRC it involves both 
clients being behind a certain configuration of stateful firewall, but i 
don't remember the details. I started using an outbound proxy (siproxd) 
and haven't had problems since, but this does require you to have some 
control over the firewall.