WordPress Website Security Protection: Firewall Security, Login Security, Database Security... Effective, Reliable, Easy to use...
The Most Comprehensive and Highest-Rated Security System for WordPress (formerly the WordPress Simple Firewall).
Block all access to your xmlrpc.php, except for JetPack and Automattic. Will poll ARIN for Automattic's subnets and update your .htaccess.
WP AntiDDOS Plugin prevents DDOS attacks on your website by blocking the frequent requests from one or several related IP addresses.