Wordfence Security is a free enterprise class security and performance plugin that makes your site up to 50 times faster and more secure.
Close site or display popup message on Shabbat and Holidays by identifying the address of the user IP and close to 40 km
WordPress Website Security Protection: Firewall Security, Login Security, Database Security... Effective, Reliable, Easy to use...
Puts the site into maintenance mode by sending a '503 Service Unavailable' status to all unauthenticated clients.
This plugin dynamically creates pages & page templates for the most common error codes/statuses and updates your HTACCESS file as required to work
Adds temporary 503 status and customisable page on your site to automatically join webblackout day - 18th January 2012