[asterisk-users] RTP stream when * and Xlite are both behind Nat devices.

[neo haux]

Hi rcswebb,


I had a problem like yours :
Asterisk -NAT - internet - NAT - 3CX phone

Without modifiyng Astrisk conf I could start a call from the client but
without hearing a sound.

The solution for me was to force Asterisk to modify the outgoing udp packet
to insert it's public ip and not the private IP behind the NAT .

So in your sip.conf I modified :

[general]
*externip=YouEternalIP*
NAT=Yes


Hope that'll help :-)

Message: 11
Date: Wed, 21 Sep 2011 10:52:08 +0100
From: Richard Webb <rcswebb at gmail.com>
Subject: [asterisk-users] RTP stream when * and Xlite are both behind
       Nat     devices.
To: asterisk-users at lists.digium.com
Message-ID:
       <CAM39q6oL6yTW4SkHq0vmRoUXx_4MkR7P6Zo4shbdh8HVqOd6+Q at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hi,

I have an Asterisk box behind a NAT address and also a Xlite 4 soft phone
behind a different NAT network.

Asterisk -> Nat -> Internet -> Nat -> Softphone.

I can register my softphone to the asterisk box ok via SIP but the RTP
stream from the asterisk box is addressed to the private non-routeable
address of the softphone when I turn on rtp debuging.

How can I configure the rtp stream to be sent to the public facing address
of the softphone?

Cheers,
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