I think you would want to do Inbound NAT with the NetMeeting ports. IIRC, in 
the past (on other FW) I've opened up port 1503 only and it worked fine but 
I didn't use all NetMeeting features. No audio, no listing in the locator 
service, etc.. Basically just desktop sharing and file transfer.

I got the following link earlier today from others to configure a DMZ. I 
believe it should apply to your situation.  All this assumes you only want 
NetMeeting on a single host.

http://m0n0.ch/wall/docbook/examples.html#id2601177

Look at section 11.1.6.3 Inbound NAT. Ignore the DMZ reference. Simply 
specify the protocol, external port, NAT IP (internal ip address of host you 
want to use for NetMeeting) and the local port number (same as your external 
port). Don't forget to check of the Auto-add FW rule box, otherwise you will 
need to add FW rules manually. If you only setup NAT and not the FW rules it 
won't work. Also make sure the order of your FW is correct, especially if 
you have blocking rules setup.

HTH,

t.


----- Original Message ----- 
From: "Bladet" <bladet at algonet dot se>
To: <m0n0wall at lists dot m0n0 dot ch>
Sent: Wednesday, March 16, 2005 11:36 PM
Subject: [m0n0wall] NetMeeting


> Hi!
>
> Trying again... locking for answer to my question.
> Many email from m0n0wall-list,  but nothing abt Netmeeting.
>
> Pleas help!
>
> As a newbe to M0n0wall....
> Lots of info abt NetMeeting but, i don't get i to work! :-(
>
> How to get NetMeeting working with m0n0wall?
>
> List of port i used, in the NAT:
> ********************************
> 389, 522, 1503, 1504, 1720, 1731, 1732, 1024
>
> Someone?
>
> (Trying b2, b3, b5 and now b6 but, no change for NM!)
>
> Tnx!
>
> /Kent Jonsson
>