[Asterisk-Users] IAX and NAT

[Brancaleoni Matteo]

VoIP protocols normally use 2 connection:
* 1 for control (eg on port 5060 for sip)
* 1 for the RTP (media stream)
The latter hasn't a fixed port, since is negotiated 
by the control connection. That could cause some troubles
with NAT & firewalls.

IAX doesn't use 2 ports, but only one . 
So on the same port it brings the control connection &
the RTP stream. So NATting IAX isn't a problem

Matteo.

Il sab, 2003-09-27 alle 11:46, Holger Schildt ha scritto:
> Hi,
> 
> I know that IAX also works between networks using NAT, but SIP or H.323
> doesn't. I wonder what is the reason for this behavior? Is there a
> difference between this protocols acccording to NAT?
> 
> 
> Thanks in advance!
> Holger
-- 
Brancaleoni Matteo <mbrancaleoni at espia.it>
Espia - Emmegi Srl