Around October Red Alert 3 will be released. Until that there is plenty of time to play the original Red Alert, which was released in 1996!
This might be old news to the real fans and die-hards, but for others this might be handy. To play Red Alert online you needed to through a lot of settings. That has been made a bit easier by following this guide on strike-team.net. It also works for Red Alert 2, and Renegade.