Comment by bitwize

Starcraft could only do internet play through battle.net, which required a legit copy. Pirated copies could still do LAN IPX play though, and with IPX over IP software you could theoretically do remote play with your internet buddies.

By the way, this is why bnetd is illegal to distribute and was ruled such in a court of law: authenticating with battle.net counts as an "effective" copy protection measure under the DMCA, and providing an alternate implementation that skips that therefore counts as "circumvention technology".