Extension:GlobalBlocking

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

Installation instructions
Download the latest snapshot and extract it to your extensions directory.

Add this line to LocalSettings.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).