A true Web Application Firewall.
This blocks semalt.com, buttons-for-website.com and others with a 403 Forbidden message so that they no longer show up in your Google Analytics stats.
Allows users to send email messages to each other as long as they know their usernames.
BruteProtect is a cloud-powered Brute Force attack prevention plugin and the best protection against botnet attacks.
IPBlock limits login attempts. There are 2 modes: set a small delay after each login attempt or allow number of attempts in given time.
Protect your site from automated logins efficiently!
Prevent unauthorized access to your admin login.
This plugin blocks distributed botnet brute-force attacks on your WordPress installation.