Simple Login Lockdown prevents brute force login attacks/attempts on your WordPress installation.
-- Alter the requesting IP address. Might be useful if you site is behind a proxy or load balancer.
-- Allows you to "whitelist" an IP address. It first when a log attempt fails before the attempt count is incremented. Return true and no count will be taken for the IP.
-- A filter that allows you to prevent the login page from
dieing if a the requesting IP is temporarily blacklisted or the login limit has been reached.
-- Fires when the requesting IP has reached its count and will be added to the blacklist for your time limit.
-- Fires when a login attempt is made but the requestin IP is blocked to to excessive requests.
-- Change the HTTP response code of that gets sent when a blacklisted IP attempts to login.
-- Allows you to alter values in the login lockdown time dropdown in the admin area.