Extension:GlobalBlocking

The GlobalBlocking extension allows a user with the appropriate permissions to block a single IP address on all projects sharing the same globalblocking database. It is intended to be used on Wikimedia for combatting severe crosswiki vandalism and spam.

Installation instructions
To retrieve the code, the following svn command may be used: svn co http://svn.wikimedia.org/svnroot/mediawiki/trunk/extensions/GlobalBlocking/ Add this line to LocalSettings.php: require_once($IP.'extensions/GlobalBlocking/GlobalBlocking.php');

You will also need to set up a database for this extension to work. At a minimum (all wikis running on the same host), you need to create a local database called 'globalblocking', and grant all database users that your wikis run as full permissions on that database (at a mimimum, SELECT, UPDATE, INSERT, DELETE).