RE: NetScreen XP and NetMeeting

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From: "Sarbjit Singh Gill" <ssgill@gilltechnologies.com>
To: "Gunn, Jeff" <Jeff.Gunn@FMR.COM>, <security-basics@lists.securityfocus.com>
Date: Mon, 16 Dec 2002 01:29:54 +0800

Hi,

I actually want to allow internal folks to initiate a netmeeting session
with somebody on the net. and vise versa. The session starts but one using
MSN initially to be in a chat session and then initiating netmeeting.

It somehow did not work both ways at all.

Cheers
Gill

-----Original Message-----
From: Gunn, Jeff [mailto:Jeff.Gunn@FMR.COM]
Sent: Friday, December 13, 2002 2:41 AM
To: 'security-basics@lists.securityfocus.com'
Subject: RE: NetScreen XP and NetMeeting

Let me preface this by saying I know nothing about Netmeeting, but I've had
to set up similar services through firewall devices. ;)

Are you a client connecting to the internet through a firewall and trying to
establish a netmeeting connection, or are you setting up a Netmeeting server
for other people to get to? The article seems to be aimed at an end-user
who is trying to configure a personal firewall to allow Netmeeting
connections out.

The big scary-looking range of ports (1024-65535) are outbound UDP ports,
which is a very common requirement. A lot of firewalls allow this by
default because it can be (sometimes incorrectly) assumed that a connection
originating from behind the firewall going out to the internet should be
allowed.

If you are trying to set up a server for other people to connect into,
though, your requirements will probably be different. I could be reading it
wrong, but it doesn't seem like the article from MS really adresses that.

        -Jeff

> -----Original Message-----
> From: Sarbjit Singh Gill [mailto:ssgill@gilltechnologies.com]
> Sent: Wednesday, December 11, 2002 2:37 PM
> To: security-basics@lists.securityfocus.com
> Subject: NetScreen XP and NetMeeting
>
>
> Greetings,
>
> As the subject goes, i need to get net meeting to work via
> NetScreen. I
> found a KB
> article(http://support.microsoft.com/default.aspx?scid=kb;en-u
> s;158623) but
> it seems to show, i had to open a whole range of ports. I am
> skeptical about
> that!
>
> e.g..
> Pass through primary TCP connections on ports 522, 389, 1503,
> 1720 and 1731.
> Pass through secondary UDP connections on dynamically assigned ports
> (1024-65535).
>
> the above shows a whole range of ports that i have to open.
> Is there a work
> around.
>
> Kind Regards
> Gill
>

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• In reply to: Gunn, Jeff: "RE: NetScreen XP and NetMeeting"
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