Here we will show how easy it is to block an IP address such the need arrise. First part is to allow all user but listed IPs, second part is to block all IP address but allow selected IP address.

Block only selected IP addresses

      order allow,deny
      deny from 123.45.67.89
      deny from 012.34.56.78
      allow from all

To deny more IP addresses simply repeat line 2 or 3 “deny from 123.45.67.89

Block all IP address but allow only selected IPs

         Order deny,allow
         Deny from all
         Allow from 123.45.67.89

More information can be found the the Apache.org website under Access Control using HTACCESS