Distributed Denial of Service

DDoS attack is an attempt to make a machine or network resource unavailable to its intended users.

Example: The hacker uses an established network of compromised computers to send requests from a large number of sources overwhelming the servers, routers, etc. The flood of incoming messages to the target system essentially forces it to shut down, thereby denying service to the system to legitimate users.

Defense: Excess capacity absorbs initial surge; hardware-based blocking denies repeated requests at the routers.

Often DDoS, “Router Attacks”, or other “Exploits” are used as a distraction while the hacker steals from the bank.