Hello,
I want to know the difference between these rules and which is most effective to block libwww-perl with the file .htaccess
SetEnvIfNoCase User-Agent "libwww-perl" bad_bot
Order Deny,Allow
Deny from env=bad_bot
or
RewriteCond %{HTTP_USER_AGENT} libwww-perl.*
RewriteRule .* – [F,L]