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Home > Archive > Linux/Unix > September 2002 > the netmeeting
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| jolanwong 2002-09-07, 11:00 pm |
| I have setup a Openbsd firewall at home. But when using Netmeeting with my friend, it cannot get connected with my friend, we just can type message to each other, should I open any ports for it to work? How to do it? | |
| Boulware5 2002-09-08, 1:41 am |
| You are not alone.
When Microsoft developed NetMeeting 3.0 they chose to use the existing h.323 video conferencing protocol. This protocol happens to be completely incompatible with standard NAT(network address translation) - the technology used for most internet sharing devices.
Unlike most TCP/IP applications, NetMeeting uses DYNAMIC PORTS instead of STATIC PORTS. That means that each NetMeeting connection is somewhat different than the last. For instance, the HTTP web site application uses port 80. NetMeeting can use any of over 60,000 different ports. Putting a web server behind a firewall means opening a single small hole. Putting a NetMeeting computer behind a firewall means opening over 60,000 ports - a security nightmare.
Check out http://www.homenethelp.com/help/netmeeting-router.asp for some possible solutions. | |
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