I just read the multicast article, which was interesting but doesn''t say anything about how to register a multicast IP. You''ll need either a dynamically registered address (for game server to clients multicast) or a static address (for "master server" replacement). How do you get those? I searched with google but all I could find was a few obscure RFCs. I don''t know what would happen if you try to use random addresses. From what I understand of the protocol it could work in some cases but that''s obviously not the right thing to do as conflicts will happen sooner or later.

Ooops. How silly of me. I looked at the end of the article for comments but I didn''t see the little link to the ''discuss this article'' forum. Thanks for the pointer.