Бан по User Agent, показывает учтённым 403 ошибку

http://drupalblog.ru/blocking-bad-bots-and-site-rippers
или

RewriteEngine On
RewriteCond %{REQUEST_URI} !^/403.php$
RewriteCond %{HTTP_USER_AGENT} .*Slurp.* [OR]
RewriteCond %{HTTP_USER_AGENT} .*Twiceler.* [OR]
RewriteCond %{HTTP_USER_AGENT} .*WebAlta.* [OR]
RewriteCond %{HTTP_USER_AGENT} .*ia_archiver.* [OR]
RewriteCond %{HTTP_USER_AGENT} .*msnbot.* [OR]
RewriteCond %{HTTP_USER_AGENT} .*Teleport\sPro.* [OR]
RewriteCond %{HTTP_USER_AGENT} .*WebCopier.* [OR]
RewriteRule .* /403.php [F]