Here is a quote from the M1122 manual...

(page 19)
Because NAPT operates on the IP and transport layers, the application that
includes IP address and port within the payload will not work properly
through NAPT. In many cases, these applications can be passed through the
NAPT using Application Layer Gateway functionality (ALG). M1122 has ALG for
the following protocols/applications:
H.323 including NetMeeting
(and others)

>From this I take it that NetMeeting does work with the M1122, and yes I can
get most of it going (application sharing, remote control, chat, whiteboard
etc), but NOT voice - haven't tried video. Any ideas?

Neal Blackie.

-----Original Message-----
From: Josh Bailey [mailto:josh@vandervecken.com]
Sent: Sunday, 5 November 2000 7:23 p.m.
To: 'Jonathan Clarke '
Cc: ''Neal Blackie' '; 'adsl@unixathome.org '
Subject: RE: What is the best way to move forward from here?

On Sun, 5 Nov 2000, Bruce Lamont wrote:

> NetMeeting uses random ports, so a normal router won't work unless you
> pinhole everything ...

Not really. The H.323 protocol just requires that endpoints be able to
address each other directly, by address. H.323's operation is pretty
complicated - this allows it to do "neat tricks" like switch codecs on the
fly, conference multiple stations, etc.

Only *some* NAT implementations are smart enough to recognise an H.323
conversation and perform the necessary machinations (in the same general
way as a common-or-garden firewall handles a conventional control + data
type FTP connection).

--
Josh Bailey (josh@vandervecken.com - Berkeley CA, USA)
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