WordPress Comment Spam – 6 Easy Ways To Stop It

1. Akismet Plug-in:
Akismet is a great plug-in to prevent your blog from comment and track-back spam. Akismet is now embedded in WordPress core and come with WordPress by default. It does a good job of picking up spam. Akismat uses a centralized database of spammer IPs and can recognize 99% + spam successfully. Akismet is a must for every blogger. To make Akismet work at your blog you need its API key. Akismet API key can be aquired by registering at WordPress.com.

2. reCaptcha Plug-in:
Large numbers of sites uses Captcha to protect their sites form spamming. Spam bots can’t read captcha images. You might have notice that big sites like Facebook, Twitter, Digg and StumbleUpon uses captcha. CAPTCHA is (an image containing some letters that are designed so only humans can read them but spam bots can’t read them). You can easily integrate Captcha images in your comment form using reCaptcha WordPress plugin.
Download: reCaptcha

3. Ask Math Question.
Ask  Math Question is a plug-in which can ask simple math questions to commentators during comment submission.  Humans can read question and give answer easily.  Plug-in name is “Math Comment Spam Protection” you can download it from link below.
Download: Math Comment Spam Protection

4. Stop Trackback Volition:
Trackback spam has also skyrocketed and many spammers are misusing trackbacks. You can use “simple Trackback Volition” plugin for protection against trackback spam. This plug-in checks IP address of the sender of trackback. This plug-in also retrieves the web page located at the URL included in the trackback, so trackback spammers won’t use bots running on infected machines. If the page is not linking to your blog the trackback link will be considered as spam. This plug-in quickly block illegitimate trackbacks.
Download: Simple Trackback Volition

5. Block Spammers by IP:
You can block Spammers by IP. In most situations spammer use separates IP for comment spamming. But if there is one or two IPs being used for comment spam that IP can be blocked form .htaccess.  To block specific IP  edit the second line to include the IP that you wish to block, then save this code in .htaccess file. (.htaccess file is located in root directory of your blog, you can access and edit it with your favorite FTP program).

Order allow, deny
Deny from 170.200.444.
Allow from all

6. Allow Registered Users to comment.

I think this idea would not be good for majority of bloggers. But it is an easy way to stop  comments spam. By enabling this option, only registered users can comment at your blog. You can find this option in your blog Setting –> Discussion.

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