NetMeeting and Intel Video Phone (and other Video user to user applications) use a protocol that is not NAT friendly.
If your connection is over a modem, you've probably not had any problem using video software. If you are getting a DSL line, and going to use NAT to share the connection amongst other PCs in your house, or are provided equipment setup for NAT, then you will find that your video software will not work, or will only partially work.
There are currently a few work-arounds to this:
•Request a bridged connection, where your IP address on the PC is a public one.
•Use Sygate as NAT software. This would be installed on your "gateway" PC, with a public IP address, and Sygate would be responsible for implementing the sharing solution. (again, avoid any hardware NAT solution).
•Place the PC you want to use NetMeeting from in the DMZ port of your NAT box, if it has one.
•Investigate if your NAT box (or DSL modem or router) firmware has a new release now offers support for Net Meeting or other video software.. upgrade to that.
•Use Linux and ipchains as your gateway machine, and the appropriate plugin module to support Net Meeting over NAT.
There are no other solutions currently.

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