block referrer

I would normally block a problem referrer using mod-security or a proven rewrite rule to a 75mb file on flickr if I'm feeling unkind. However I'm unable to block a new referrer today perhaps since installing vbseo and I'm at a loss to explain why, especially where when I test mod-security sending their referrer using Lynx my server behaves as it should and blocks the request.

So I'm left thinking it's not working because the referrer I'm using is wrong or there's a conflict with vbseo. Any thoughts?

Thanks!

Hugh

Never mind, this code in .htaccess worked...

# set the spam_ref variable
SetEnvIfNoCase Referer "^http://(www.)?some-spammer.com" spam_ref=1

SetEnvIfNoCase Referer "^http://(www.)?other-spammer.com" spam_ref=1

SetEnvIfNoCase Referer "^casino-poker" spam_ref=1

# block all referres that have spam_ref set
<FilesMatch "(.*)">
Order Allow,Deny
Allow from all
Deny from env=spam_ref
</FilesMatch>