Do you allow guest posts on your blog or people to register first before commenting? You will notice that many registrations are made by spam bots. I recently posted about blocking spam guests, but this thing has gone little further.
Using Sabre WordPress Plugin (Simple Anti Bot Registration Engine)
I came across multiple plugins to block registrations, but I Sabre is the best anti-spam plugin. All you need to do is just install the plugin and enable different CAPTCHA options.
Sabre has multiple features that allow you to avoid or block bots from registering.
You can set three different CAPTCHA options and if you are too much frustrated by spam, you can turn all the captchas on at the same time 
.
You can also enable the policy box that everyone needs to check before registration.
Stealth option is like sixth sense that decides registrations to block depending on different options.
Other Alternatives
You can block IP address in WordPress Settings>Discussions. Simply add the IP address, but it is for comment spam.
You can also block IP address in your .htaccess file by adding the simple code.
order allow,deny
deny from 127.3.0.0
deny from 127.3.0.1
deny from 127.3.0.2
allow from all
Only add one IP per line and if you don’t know how to edit .htaccess file ask your web host or developer.
Conclusion
Sabre is the simple and best option to block spam registrations. If you want to block registration and comments from certain IP, then use the .htaccess option.
Article by Ahmad Wali
Ahmad Wali is an Entrepreneur Blogger and SEO Expert running his blogs and websites like eBest Cars UK, E-Wali.com and SEO company SEOIV.com. I help small businesses, entrepreneurs, webmasters, and individuals to develop their online presence. Say Hello on Twitter @E_wali.
Ahmad has written 76 awesome articles for us at E-Wali
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