This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Spam IP Blocker


This is a spam IP blocker. It is free. It marks any new comment as spam automatically when commenter’s IP exists in at least one of ‹› & ‹›.
Plugin is based on public DNSBL class.
Official page of DNSBL class on


  1. Upload folder spam-ip-blocker to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‹Plugins› menu in WordPress
  3. Place <?php do_action('plugin_name_hook'); ?> in your templates


Why do I need one more anti-spam plugin?

Because I haven’t found any free plugins using biggest spam blocking lists all together.


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Contributors & Developers

“Spam IP Blocker” is open source software. The following people have contributed to this plugin.


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First version.


Now plugin uses just one default DNSBL checker.
DNSBL class also fixed to aviod this problem:
[ «Your DNSBL blocks the whole Internet!»]


Added the new feature of new DNSBL class version.
Group checking is back, ‹all› key provides checking in group available checkers, now they are ’spamhaus› & ’spamcop›.
See readme of DNSBL class for details:
[ «DNSBL class on»]