[cisco-voip] ATA behind a firewall

[Andrew Croch]

I have been trying to use ATA behind firewall without success. Please 
consider the following scenario:
ATA using H323 and with private IP, behind NAT firewall (a simple home 
router such as linksys or netgear)
Gatekeeper (gnugk) with public IP

1. Can I terminate calls in two different ATAs behind the firewall ? (I 
imagine I need to do port forwarding in the router to a single ATA so only 
one ATA can terminate the call inside the LAN)

2. Can I call from one ATA behind firewall to another ATA behind another 
firewall using the gnugk ? Do I need a proxy for that ?

3. Is SIP better than H323 for NATed ATAs ?

Thanks,
Andrew

>From: "neil quiogue" <neil at quiogue.com>
>To: "Diego Costa" <diego at ifxnw.com.uy>,        "Cisco-Voip" 
><cisco-voip at puck.nether.net>
>Subject: Re: [cisco-voip] ATA behind a firewall
>Date: Wed, 31 Dec 2003 07:01:33 +0800
>
>Actually, with Cisco ATA system version 3.0 (released December 15), there's
>support for STUN.  You just need to download the SIP software since H.323
>and SIP are now separate.
>
>Please check with your Cisco partner.
>
>Regards, Neil
>
>----- Original Message -----
>From: "Diego Costa" <diego at ifxnw.com.uy>
>To: "Cisco-Voip" <cisco-voip at puck.nether.net>
>Sent: mardi 30 décembre 2003 04:17
>Subject: [cisco-voip] ATA behind a firewall
>
>
> > Hello guys,
> >
> >     I want to try cisco ATA behind a NAT, I can use SIP and H323 also,
>I've
> > read some about STUN but in the documentation of the STUN servers that I
> > review, said that they don't work with Cisco ATA's.
> >
> >
> > The scenario would be:
> >
> >  ------------                     --------------                        
>--
>--
> > ---
> > | Gatekeeper |----Public IP's----| NAT FIREWALL |----Private IP's----> |
> > ATA-1 |
> >  ------------                     --------------                        
>--
>--
> > ---
> >
> > I would appreciate any help or suggestion.
> >
> > Thanks
> > Diego.
> >
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> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
>
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