This module protects against Brute Force attacks.
After 3 failed login attempts Blocks the ip and gets error 403 for the Admin area.
Keeps a list of IPs and allows you to remove some of the blocked Ips.
It also have a whitelist where you can add your fixed Ips, this way it will not be blocked if you make more than 3 wrong login attempt.
The module can be installed with IC module installer.
After Installation you must press the modifications Refresh.