I did a post for a Antivirus plugin for WordPress, several users commenting about different plugins that improve the security of WordPress, so I decided to sum up some of the plugins that provide security and comment spam protection for WordPress blogs.
Anti-spam WordPress Plugins
Akismet – One of the best plugins to protect your WordPress blogs against spam comments, this plugin has worked like a charm for many users, saving then time and effort while moderating and managing comments.
WP-SpamFree Anti-Spam – An extremely powerful WordPress anti-spam plugin that eliminates blog comment spam, including trackback and pingback spam. Includes spam-free contact form feature as well.
WP reCAPTCHA – reCAPTCHA is an anti-spam method originating from Carnegie Mellon University which uses CAPTCHAs in a genius way. Instead of randomly generating characters, reCAPTCHA uses a combination of these words from digitalized books and further distorts them to construct a CAPTCHA image.
Math Comment Spam Protection – Probably the most simplest way to thwart spammers robots from posting comments on your blog, it adds a new field to the comment form asking users to enter a sum of two numbers, you will have to edit your contact template to include the comment spam field to it.
Security Related WordPress Plugins
WP Security Scan – Scans your WordPress installation for security vulnerabilities and suggests corrective actions. It allows you to generate strong passwords, check improper file permissions, database security, version hiding, admin panel protection and more.
WordPress Exploit Scanner – This plugin searches the files on your website, and the posts and comments tables of your database for anything suspicious. It also examines your list of active plugins for unusual filenames.
AskApache Password Protect – You can set up Password Protection for your blog using HTTP Basic Authentication, or you can choose to use the more secure HTTP Digest Authentication.
TTC WordPress Security Tool – This plugin blocks cross-site script attempts, ip numbers of ill behaved people and bots and bans bad user agents.
Secure WordPress – Little help to secure your WordPress installation: Remove Error information on login page; adds index.html to plugin directory; removes the wp-version, except in admin area.
WordPress Firewall – This WordPress plugin investigates web requests with simple WordPress-specific heuristics to identify and stop most obvious attacks.
Did I miss anything out? Do you use any plugins for optimizing security and protecting against spam comments? Do share them with others by commenting here.