RewriteEngine On RewriteCond %{REQUEST_METHOD} ^(HEAD|TRACE|DELETE|TRACK) [NC,OR] RewriteCond %{HTTP_REFERER} ^(.*)(<|>|'|%0A|%0D|%27|%3C|%3E|%00).* [NC,OR] RewriteCond %{REQUEST_URI} ^/(,|;|<|>|/{2,999}).* [NC,OR] RewriteCond %{HTTP_USER_AGENT} ^$ [OR] RewriteCond %{HTTP_USER_AGENT} ^(java|curl|wget).* [NC,OR] RewriteCond %{HTTP_USER_AGENT} ^.*(winhttp|HTTrack|clshttp|archiver|loader|email|harvest|extract|grab|miner).* [NC,OR] RewriteCond %{HTTP_USER_AGENT} ^.*(libwww|curl|wget|python|nikto|scan).* [NC,OR] RewriteCond %{HTTP_USER_AGENT} ^.*(<|>|'|%0A|%0D|%27|%3C|%3E|%00).* [NC,OR] RewriteCond %{HTTP_COOKIE} ^.*(<|>|'|%0A|%0D|%27|%3C|%3E|%00).* [NC,OR] RewriteCond %{QUERY_STRING} ^.*(;|'|").*(union|select|insert|declare|drop|update|md5|benchmark).* [NC,OR] RewriteCond %{QUERY_STRING} ^.*(localhost|loopback|127\.0\.0\.1).* [NC,OR] RewriteCond %{QUERY_STRING} ^.*\.[A-Za-z0-9].* [NC,OR] # prevents shell injection RewriteCond %{QUERY_STRING} ^.*(<|>|'|%0A|%0D|%27|%3C|%3E|%00).* [NC] RewriteRule ^(.*)$ your_error_file_here.php