Black Hole Routing
Black hole routing (or black hole filtering) is often used to dynamically block hosts that are attacking your network. These hosts are typically found using a network or host IDS.
For More Information
|Recommended:||Black Hole Routing Tutorial at NANOG
|Useful:||Blog on Black Hole Routing from Nick Buraglio|
|Blog on Black Hole Routing from David Davis
Note that this should only be done by experienced network engineers, as it is fairly easy to break your network if done incorrectly.