Sometimes, in order to avoid so many useless visit to your server, which may cause a waste of resource and slow response, it is necessary to limit IP address.
Create a file named .htaccess in the web directory, then add the following contents according to your purpose.
Block IP address
Block certain IP address
order allow,deny
deny from 222.222.222.222
allow from all
Block several IP addresses, just several deny from will be OK
order allow,deny
deny from 222.222.222.222
deny from 111.111.111.111
deny from ***.***.***.***
allow from all
Block one entire IP period
order allow,deny
deny from 222.222.222
allow from all
Block part of one entire IP period
order allow,deny
deny from 222.222.222.100/200
allow from all
Allow IP address
Allow certain IP address
order allow,deny
allow from 222.222.222.222
deny from all
Allow several IP addresses, just several allow from will be OK
order allow,deny
allow from 222.222.222.222
allow from 111.111.111.111
allow from ***.***.***.***
deny from all
Allow one entire IP period
order allow,deny
allow from 222.222.222
deny from all
Allow part of one entire IP period
order allow,deny
allow from 222.222.222.100/200
deny from all
Block certain website
If you find some websites copy your blog, just block them!
order allow,deny
deny from .copy.com [this is website]
allow from all
This will block the visit from copy.com website, there is a dot before copy.com, this will block all its website (including second-level domain).