Ban users by IP, IP Range, host name, user agent and referrer url from visiting your WordPress's blog.
WP Engine has a custom 404 page for bots. This plugin removes that customization.
Anti-Captcha is a transparent spam solution that does not require any end-user interaction.
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
NURCaptcha inserts a reCAPTCHA on the Register Form of your site to protect it against spambots.
Protect your site with a video CAPTCHA solution that provides better security and is easier to read for your visitors.
The most advanced protection against sploggers and spam users registration, is fully WordPress, WordPress MU, BuddyPress and bbPress 2.0 compatible
Stop your WordPress website from being spammed by bots and restrict it only to humans.
Keep Your Site Happy, add Khush Captcha Anti-SpamBot Technology to your WordPress Registration and Comment Forms.
SpotBot aids in controlling spam before it clutters up your server. It stops bots in their tracks before they have a chance to post or force post.
Simple question that blocks most spambots (and paid robots) by making them answer a common sense question
Bloquea el spam de todo tipo de robots con un captcha que es invisible para los usuarios de tu web o blog.
Integrates CaptchaAd anti-spam methods with WordPress including comment, registration spam protection.
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