Programs: Lock up your servers against Fusker

[Cleo]

This is what I've found that works.
RewriteCond %{HTTP_REFERER} !^http://www.yourdomain.com/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://yourdomain.com*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://yourdomain.com/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.yourdomain.com*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://yourdomain.com:80/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.yourdomain.com:80/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://yourdomain.com:80.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.yourdomain.com:80.*$ [NC]