The fastest firewall plugin for WordPress.
The Most Comprehensive and Highest-Rated Security System for WordPress (formerly the WordPress Simple Firewall).
Allow or disallow visitors from certain countries accessing (parts of) your website
Protection against brute force attacks and bots. Restrict login by IP access lists. Monitor user and bot activity. Limit login attempts. reCAPTCHA.
Protect WordPress website against brute force attacks. Limit rate of login attempts.
The AVH First Defense Against Spam plugin gives you the ability to block spammers before any content is served.
Grants or denies access to a list of IP addresses
Gatekeeper allows administrators to take a WordPress site offline while leaving it accessible to authorized users for maintenance, testing, etc.
This plugin adds creates a whitelist of shortcode tags that can be applied to comments, bbPress and BuddyPress.
Limit Attempts Booster is a WordPress plugin which provides high security and limits your WordPress access. It also safes from Brute Force Attacks.
Block unwanted users from registering to your WordPress site with custom defined blacklist and whitelist rules.
Restricts registration to email addresses listed within the options file. Assumes WP native registration is turned off.
Limits access to the site to people on an allowed list of IP addresses.
Limit access to the site to those with a cookie token. Visitors without the cookie see a customisable "coming soon" style of page.
Adds Whitelist and Blacklist options for Trackbacks and Pingbacks
The Whitelist plugin enables you to open your website to a set of users and blocks everyone else. You can enter users by their email address into the
Enables the use of Albus whitelisting plugin for Bukkit (Minecraft) on WordPress installations