How does teamplay Starcraft/battle.net and NAT work? DSL FAQ

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Can I share my DSL line with my other computers?
I have Proxim Symphony or homefree. Can I use that with DSL?
Problems with NAT and some applications.
How do I get NAT to run with SecuRemote 4118 from Checkpoint?
How does teamplay Starcraft/battle.net and NAT work?
Can I share my DSL connection on my MAC?
What is NAT?
Sharing with a Router or Switch
Sharing with a Hub or ICS, and no router
Why can't I DCC chat on IRC?

How does teamplay Starcraft/battle.net and NAT work?

People have got starcraft "team play" behind NAT working ok using Linux ipchains (which is highly configurable). See http://slashdot.org/askslashdot/99/07/26/0135241.shtml, and search in that discussion for "starcraft", otherwise, the general problem of teamplay on a UDP based multiplayer game where the team is behind a single NAT box, can be a challenge for NAT software and equipment.

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How does teamplay Starcraft/battle.net and NAT work?