With ClanBase and ESL no longer around, nowadays CyberGamer EU supports ET with cups and ladders and an anticheat called CGAC, but it only works in official matches.
There is no official anticheat for public servers, but PB is still used on a lot of them, along with a few other methods of detecting cheats. Some mods have their own built-in anticheat - N!tmod and silEnT, for example.
Yeah, you should be pretty much good to go if you download ET from the above link, though you may have to also download PB and an etkey here. Not entirely sure since I don't really play on public servers myself.
With ClanBase and ESL no longer around, nowadays CyberGamer EU supports ET with cups and ladders and an anticheat called CGAC, but it only works in official matches.
http://www.crossfire.nu/group/view/id/7638
is pb still on other mods?