[Asterisk-Users] SIP, * and clients behind NAT

[Helder Rogério [MICROREDE]]

Hi John,

I had a similar problem solved while putting on the extension of the
terminal adapter nat=yes

[252309970]
type=friend
host=dynamic
callerid="252309970 - Pincol Sede" <252309970>
nat=yes
canreinvite=yes

Hope it solves your prob


----- Original Message ----- 
From: "John Huang" <asterisk at thinkapex.com>
To: <asterisk-users at lists.digium.com>
Sent: Tuesday, January 11, 2005 5:33 PM
Subject: [Asterisk-Users] SIP, * and clients behind NAT


> I am new to VOIP, Linux and Asterisk.  Through a lot of reading (this
> list, voip-info.org, documentation, etc.), I successfully installed FC3
> and * on a new Dell SC420 with two X100P connecting to two PSTN lines at
> my office.  I've also installed AMP to help me configure IVRs, call
> groups, extensions, etc.
>
> I use a Handytone-286 ATA and x-lite clients on the internal network and
> all works fine.
>
> I would like to connect to * as an extension from home, from client
> sites, from hotels, etc.  Most of these places will be behind some type
> of NAT and/or firewall.  At my home, for example, I have a consumer
> grade firewall/NAT.  I cannot get the Handytone-286 to work properly
> from there.  I connect to the * server and register, I can call out and
> incoming calls ring in, but there is no audio sent nor received
> regardless of whether dialing out or calling in.
>
> I suspect this has to do with RTP and how my home firewall/NAT handles
> RTP.  Is my thinking correct here?  What's frustrating is that I can't
> get it to work even if I put the Handytone-286 in a DMZ.  Maybe the
> firewall/NAT is still processing and malforming the RTP packets?
>
> Even if I do get the ATA working fine behind my home NAT, I would have
> to do some reconfiguration most likely anywhere else I try plugging it
> in, right?  And, if I wanted to add another ATA at home connected to the
> same remote * server, it's most like not going to work without custom
> RTP port forwards, etc., right?
>
> Thanks,
>
> John
>
> John Huang
>
>
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