Allows access to privileged accounts to be based on a set of IP address filters. Moderator and administrator privileges can be restricted to specific IP addresses.

Warning: Incorrect use of this plugin can cause Admin CP access to be denied to all administrators. It is possible to recover from such a scenario, but it isn't easy. Recovery instructions are included in the documentation.

Quelle: http://mods.mybboard.net/archive/view/restrict-ip