htaccess HTTP USER AGENT restrict

htaccess browser user agent restrict flood

[Seregwethrin]

Hello;

I want to protect my web site with htacces. I want to allow only internet explorer, firefox, opera because of bot attacks.

RewriteCond %{HTTP_USER_AGENT} EmailWolf [OR] 
RewriteCond %{HTTP_USER_AGENT} ExtractorPro 
RewriteRule ^.*$ X.html [L]

For example this code makes EmailWolf and ExtractorPro agents send to x.html, but other user agent open default url. But i want to restrict other agents, with else or not equal syntax.

How can i do this?

[jdMorgan]

This answers your specific question, but I don't recommend it:

# Rewrite requests from all user-agents except modern Internet Explorer, Firefox, Opera
RewriteCond %{HTTP_USER_AGENT} !^Mozilla/4\.[0-9]+\ \(compatible;\ MSIE\ [0-9.]+
RewriteCond %{HTTP_USER_AGENT} !^Mozilla/5\.0 \(([^;]+;\ )*[^;]+\)\ Gecko/2[0-9]{3}\ Firefox/[0-9.]+
RewriteCond %{HTTP_USER_AGENT} !^Opera/[0-9.]+
RewriteRule .* X.html [L]

Alternate end rule to return 403-Forbidden response:

RewriteRule .* - [F]

Jim

[Seregwethrin]

Thank you jdMorgan.