WordPress Security: Limit Login Attempts
The picture says it all really. There are bots active trying to hack WordPress sites all over the web by trying to log in to your account using any and all possible password combinations.
This plugin allows you to lock it down by setting the amount of retries you allow before the ip address of the person trying to get in gets blocked. It’s effective, and necessary.
Also make sure you rename the default admin account as this is the username the bots use for their login attempts.