SetEnvIfNoCase User-Agent "MJ12bot" bad_user SetEnvIfNoCase User-Agent "YandexBot" bad_user SetEnvIfNoCase User-Agent "YAhrefsBot" bad_user SetEnvIfNoCase User-Agent " SemrushBot" bad_user Deny from env=bad_user Deny from all Deny from all Deny from all Deny from all SetEnvIfNoCase User-Agent "MJ12bot" bad_user SetEnvIfNoCase User-Agent "YandexBot" bad_user SetEnvIfNoCase User-Agent "YAhrefsBot" bad_user SetEnvIfNoCase User-Agent " SemrushBot" bad_user Deny from env=bad_user