How to block malicious bots from apache server.
If your apache server has heavy load then check the access log to see who is send most requests.
If this is a bot or spider then block it.
in apache open httpd.conf to add a global rule.
in the <Directory> where htdocs is add this code
Require all denied
Require ip 47.128.0.0/16It will block access from all the ips starting from 47.128
If it does not solve the problem then your have to add the rule to block the spider / bot by its name like this