Re: NetMeeting and NAT firewall

From: Ben Mack (nospam@ben.watchfront.co.uk)
Date: 03/15/02 

From: Ben Mack <nospam@ben.watchfront.co.uk>
Date: Fri, 15 Mar 2002 10:55:40 +0000

In article <kvik8.5274$LR6.695582@typhoon.southeast.rr.com>, Lurker#2
<L@2.com> writes
>"Phil" <phil.g4iio@ntlworl.com> wrote in message
>news:RY2k8.57136$yc2.6202438@news2-win.server.ntlworld.com...
>> Is it possible to support NetMeeting via a NAT firewall>
>
>The short answer is yes. However, if you want to use audio/video (which I'm
>assuming you do if your using NetMeeting) you might as well not have a
>firewall because you have to open LOTS of ports.

If you trust the other machine you are connecting to, just allow all
traffic from that IP address, leaving all ports closed to traffic from
other addresses and so not rendering your firewall useless

However, the real question AIUI was will it work with NAT, the simple
answer is no, unless you either
a) port map all incoming NetMeeting sessions to a specific machine
b) run a H.323 gateway on your NATing router
c) read up about UPnP NAT Traversal (I haven't) 

-- 
Ben Mack                           mailto:news@ben.watchfront.co.uk
Watchfront Electronics             http://www.watchfront.co.uk/

Need a good firewall?              http://www.firebrick.info/

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