For those will an SSL certificate, this plugin forces an HTTPS connection for security purposes.
This plugin blocks distributed botnet brute-force attacks on your WordPress installation.
Blue Captcha is a powerful and highly customized WordPress plugin that effectively protects your WP blogs from spammers and unwanted persons.
Combat spam registrations for a BuddyPress-powered site using Google's reCAPTCHA
Grants or denies access to a list of IP addresses
Comment spam prevention without moderation, captchas or questions
Instant account security with effortless, email-based two-factor authentication; optional mobile app for more security; no tokens.
WP DoNotTrack stops plugins/ themes from adding tracking code or cookies, protecting visitor privacy and providing performance and security benefits.
Totally disables XMLRPC, preventing the recent Pingback spam vulnerability.
This plugin adds a reCAPTCHA form to BuddyPress registration form to keep your community spam free.
Instantly turn your WordPress installation into a private corporate intranet
Hide and increase Security for your WordPress website instance using smart techniques. No files are changed on your server.
A simple, light-weight collection of tools to help protect wp-admin, including password strength requirements and brute-force log-in prevention.
An easy to use wordpress Captcha plugin to prevent spam on your site. You can use Image Captcha to protect comments and the admin panel.
Protect WooCommerce login, registration and password reset form against spam using Google's No CAPTCHA reCAPTCHA.
Block access to your admin pages by country.
Change your admin username to whatever you like. Improve your site security and make life difficult for the hackers.
Log all activity of users and get notified when user login to admin area.
Add more than 1 password to your protected pages, also administrators and page's authors can view the protected pages without password.
Stop spam with a fun game instead of distorted text! PlayThru works effortlessly on blog comments, registration pages, lost password forms, and more.
Automatically clear CloudFlare cache. And, protect your WordPress site at DNS level.
Secure WordPress login with Two Factor Authentication - supports WP, Woo + other login forms, HOTP, TOTP (Google Authenticator, Authy, etc.)
Improves the security of the login page against brute-force attacks. Records every attempts to login. Easily block an IP address.
yaCAPTCHA is a CAPTCHA plugin for WordPress that helps you block comment spam from automated bots.
Secures any WordPress URL using Private SSL. Once the plugin is activated go to the Admin SSL config page to enable SSL and read the installation inst
Easily create a "Coming Soon" page for your WordPress site.
"Re-imagined" version of Semisecure Login that uses public and secret-key encryption to encrypt passwords when logging in.
Create a static copy of your WordPress site that you can serve on your favorite web server.
WS Custom Login provides you to easy way to customize the appearance of the WordPress wp-login.php page.
MP Spam Be Gone is the simplest, most effective Spam blocker.