The anti-cheating client/server program punkbuster is being upgraded with counterstrike support. From the Guru of punk himself:
Head on over to the site hereWe are currently adding CounterStrike support into the existing framework. Since most of the cheats we are researching can be used with any half-Life mod, it just makes sense to have the Server and Client both be aware of multiple Half-Life mods rather than developing separate products for each mod. We hope to start CS beta testing some time next week.