Block Top Spammers displays a list of your top spammers’ IP addresses, based on all comments in your database that are marked as spam. It also generates a blacklist for your .htaccess file to block those spammers from your website entirely, thus taking load off the server. – You will need another plugin (like Akismet) to identify the spam.
PHP 5 and Apache required.
Roadmap
0.6 (April 2010)
- edit blacklist (i.e. remove individual addresses, manually add addresses and/or subnets)
- manually override .htaccess location
- customize 403 error shown to blocked spammers
1.0 (May 2010)
- Multi-Site support (WordPress 3.0, maybe WPMU 2.8/2.9)