Just enabling or forwarding those ports is not enough if you also want
inbound video. You will need either a gateway that handles H.323 or
something in your firewall that will allow &/or pass through the H.323
protocol. There are many articles on the H.323 and VoIP (Voice over IP)
protocols that explain some of the options. All my bookmarks to such
articles are at home, but the best one I found was in a Linux How-To which I
found via a search on Linux.com.

                -Kate Ledum
                Concord EFS
                Complex Systems
                Pleasanton, CA
                (925) 416-3234
               kledumneteps.com

> -----Original Message-----
> From: Free, Bob [mailto:RWF4PGE.COM]
> Sent: Wednesday, April 04, 2001 15:23
> To: FOCUS-MSSECURITYFOCUS.COM
> Subject: Re: Ports used for inbound Netmeeting 3.0
>
>
> From How to Establish NetMeeting Connections Through a
> Firewall [Q158623]
>
> NetMeeting uses the following Internet Protocol (IP) ports:
>
> Port Purpose
> -------------------------------------
> 389 Internet Locator Server [Transmission Control
> Protocol (TCP)]
> 522 User Location Server (TCP)
> 1503 T.120 (TCP)
> 1720 H.323 call setup (TCP)
> 1731 Audio call control (TCP)
> Dynamic H.323 call control (TCP)
> Dynamic H.323 streaming [Realtime Transport Protocol
> (RTP) over User
> Datagram Protocol (UDP)]
>
> To establish outbound NetMeeting connections through a firewall, the
> firewall
> must be configured to do the following:
>
> - Pass through primary TCP connections on ports 522, 389,
> 1503, 1720 and
> 1731.
>
> - Pass through secondary UDP connections on dynamically
> assigned ports
> (1024-65535).
>
> -----Original Message-----
> From: Bill Walsh [mailto:bwalshWYNTRAC.COM]
> Sent: Wednesday, April 04, 2001 2:03 PM
> To: FOCUS-MSSECURITYFOCUS.COM
> Subject: [FOCUS-MS] Ports used for inbound Netmeeting 3.0
>
>
> I plan on implementing Netmeeting 3.0 (the version including
> with Win2000)
> to receive calls strictly for program sharing, not audio/video
> conferencing.. I have to open up ports on the firewall to do
> so, but the
> Netmeeting Resource Kit on MS's web site is not very specific
> regarding
> inbound calls, they make reference mainly to outbound calls..
>
> I suspect that it is simply ports 522 and 1503 via TCP, is
> this correct?
> Does anyone have any experience with this?
>
> regards,
> bill
>

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]