Currently running sites in PHP Nuke. Playing around with Drupal 6 beta and am impressed. Looks like a great option moving forward. However, after being hacked in Nuke awhile back, I've become very dependent on Nuke Sentinel for security. Being able to easily monitor access, block harvesters, and block entire country ranges has been invaluable to me. I've gone from a plethora of nonsense hits from other countries to practically none. Is there any equivalent functionality or module to Sentinel for Drupal?