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In the words of Emily Litella .... Never mind. The problem with the test I ran with the user in New Mexico (Los Alamos Natl. Lab) turned out to be at his end; the network folks had recently blocked all outbound UDP. (H.323 conferencing uses quite a few ports actually, both static and dynamically assigned, which makes videoconferencing across a firewall a real nightmare.) Every other test I have ran has worked as well. I'm still not positive what the problem with the user in Germany was but I doubt it was our equipment or network. Kevin M. Carr ************************** Systems Administrator Genomics Technology Support Facility 202-D Biochemistry Bldg. Michigan State University East Lansing, MI 48824 Ph: (517) 353-6794 Fax:(517) 353-8638 ************************** > From: Doug Nelson <[log in to unmask]> > Reply-To: Doug Nelson <[log in to unmask]> > Date: Tue, 1 Jun 2004 18:07:18 -0400 > To: [log in to unmask] > Subject: Re: [MSUNAG] Videoconference Problems > >> >> Have any changes been made recently at the network perimeter which would >> cause problems for IP based (H.323) videoconferencing? I have a user who >> has been successfully videoconferencing with a colleague in Germany for a >> few months. The user in Germany initiates the videoconference. Last week >> they were unable to connect. >> >> I just ran a test with someone in New Mexico, they were also unable to >> connect to our unit. I did not try initiating the connection to them since >> they have firewall issues at their end. >> >> I tested the equipment by connecting to it from within the building and from >> another building on campus so the equipment appears to functioning normally, >> is properly configured and there appears to be no issue with the building >> router. >> >> Has there been some policy change at the campus network perimeter to block >> IP videoconferencing? > > There has been no change at the border that should affect videoconferencing. > Do you know what port number is being used? The only ports we block at the > border are related to Microsoft networking. > > Doug > > > Doug Nelson, Network Manager | [log in to unmask] > Academic Computing and Network Services | Ph: (517) 353-2980 > Michigan State University | http://www.msu.edu/~nelson/ >