Take the guesswork out of WordPress security. iThemes Security offers 30+ ways to lock down WordPress in an easy-to-use WordPress security plugin.
Pike FIrewall stands for limiting actions to the users that came from anonymous traffic sources and IDS for wordpress.
Max power spam protection, all-in-one, premium anti-spam. No comments spam & registrations spam, no email spam, protects any forms. Forget spam.
The most advanced protection against sploggers and spam users registration, is fully WordPress,WordPress MU ,BuddyPress and bbPress 2.0 compatible
An exceptionally powerful WordPress anti-spam plugin that eliminates comment spam, trackback spam, contact form spam & registration spam.
Tor Blocker stands for limiting actions to the users that came from Tor nodes, countries or cloud/hosting/vpn providers.
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.
Limit rate of login attempts and block IP temporarily (Up to 10 minutes). It is protecting from brute force attacks.
Styled user management for login, register, user profile... - optional: user chosen passwords, e-mail validation, admin approval, reCaptcha and more
This plugin allows you to implement Google reCAPTCHA (CAPTCHA) into your web forms.
Prevent people from registering with emails that contain a subdomain to help reduce spam.
This plugin allows you to implement super security captcha form into web forms.
Ban users by IP, IP Range, host name, user agent and referrer url from visiting your WordPress's blog.
Adds a Google No Captcha ReCaptcha checkbox to your WordPress login screen.
Industry leading bot detection and analytics through the use of the Ellipsis Human Presence score proprietary technology.
Prevent brute force logins on your WordPress site with Google's reCAPTCHA.
NURCaptcha inserts a reCAPTCHA on the Register Form of your site to protect it against spambots.
SpiderBlocker will block most common bots that consume bandwidth and slow down your server.
Protect WooCommerce login, registration and password reset form against spam using Google's No CAPTCHA reCAPTCHA.
Protect your site against bad bots by trapping them in a virtual blackhole.
Adds some extra security to your WordPress with only one click.
Easiness and effectiveness are the keys for a valid Captcha control. DC generates appealing captcha for your WP blog without compromising usability.
Stop the Spam bot as semalt and buttons-for-website that appear on Google Analytics and have real reports.
Simple question that blocks most spambots (and paid robots) by making them answer a common sense question
Simply uses the HTTP_REFERER to determine if it's from 'Semalt', and blocks it with a nice 403 "Unauthorized" response.
Block Semalt from crawling your website.
Anti-Captcha is a transparent spam solution that does not require any end-user interaction.
WP Engine has a custom 404 page for bots. This plugin removes that customization.
This plugin adds a new form of captcha to your Buddy Press registration and comment forms. Use this plugin to prevent bots from spamming your website