If your computer is protected by a firewall (which may be the case if you are on a network), your systems administrator may need to adjust the ports on the firewall to allow full NetMeeting functionality. In particular, you may not be able to receive audio and video without reconfiguration of the firewall.

In order for make full use of NetMeeting, the firewall needs to configured in such a way that data can:

• Pass through primary TCP connections on ports 389, 522, 1503, 1720, and 1731.
• Pass through secondary TCP and UDP connections on dynamically assigned ports (1024-65535).

For further information on the function of each port for NetMeeting or information on how to configure your firewall accordingly, please visit http://www.microsoft.com/Windows/NetMeeting/Corp/ResKit/Chapter4/default.asp .