Looks like i was hit by the telemarketing spam again. This time in the form of blog comments from 188.8.131.52 (aka citrix.owl-global.com, or The Owl Companies). So i’ve dived in and I’ve installed mod_access_rbl using some very easy to follow instructions.
As Blars mentions ‘This module will perform a dns lookup every time a “deny via” (or “allow via”) access is tested’, but with a local dns server (bind) caching these requests, a reduction in speed is unnoticable.
Thanks again Blars. You Rock!