[heyday]

Did some googling...

Med mod_rewrite
http://www.arclid.com/website_design...-Spam-Help.php

En lite mer avancerad (enligt mig)
http://chris.quietlife.net/?p=439

En modul!
http://www.modsecurity.org/projects/...che/index.html

more.
http://it.slashdot.org/article.pl?si...1&tid=95&tid=4