SetEnvIfNoCase User-Agent "ahrefs.com" bad_bot
SetEnvIfNoCase User-Agent "megaindex.ru" bad_bot
SetEnvIfNoCase User-Agent "Java/1." bad_bot
SetEnvIfNoCase User-Agent "linkpad.ru" bad_bot
<Limit GET POST HEAD>
Order Allow,Deny
Allow from all
Deny from env=bad_bot
</Limit>