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NetBouncer is a research project currently under funding by the Fault Tolerant Networks (FTN) program within DARPA. The project is developing a set of innovative technologies to enable organizations to defend against distributed denial-of-service (DDoS) attacks. NetBouncer is being designed to provide a DDoS defense solution that can meet the scalability and performance needs of high bandwidth, real world, commercial and military environments. In its current form, NetBouncer technology consists of high-speed packet processing and filtering devices built on top of leading-edge network processor technology. The key innovation of the NetBouncer approach is the ability to distinguish legitimate traffic from illegitimate traffic.