A lockdown feature for failed login attempts can solve the huge problem of continuous brute force attempts. Whenever there is a hacking attempt with repetitive wrong passwords, the site gets locked, and you get notified of this unauthorized activity.
I found out that the iThemes Security plugin is one of the best such plug-ins out there, and I’ve been using it for quite some time. The plugin has a lot to offer in this respect. Along with over 30 other awesome WordPress security measures, you can specify a certain number of failed login attempts before the plugin bans the attacker’s IP address.