DDos attack at our datacenter

A fellow customer at our datacenter has been under a DDos attack for the last couple of hours/days(?). The result of this is that the internet connection to our datacenter is probably overloaded. The servers will be available on and off until the attack is over.

(A DDos attack is a 'hacking' attack by means of overloading the target with millions of connections while the target is not prepared to serve them all, causing the server (and connection) to overload, possibly crash and be vulnerable.)