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RotoRouter: Router Support for Endpoint-Authorized Decentralized Traffic Filtering to Prevent DoS Attacks

Albert Kwon, Kaiyu Zhang, Perk Lun Lim, Yuchen Pan, Jonathan M. Smith, and André DeHon
Proceedings of the IEEE International Conference on Field-Programmable Technology, (FPT, December 10--12, 2014)

RotoRouter addresses Denial-of-Service (DoS) attacks on networks with a novel protocol and router implementation. Sets of RotoRouters cooperate in detecting and filtering out invalid network traffic before it reaches network endpoints; a new router-enforceable connection protocol queries destination endpoints to authorize traffic flows and uses per-packet digital signatures to distinguish allowed from disallowed connections. A RotoRouter prototype was implemented on a four-port 1000BASE-T NetFPGA-10G platform and supports 1024 simultaneous active connections using 74 BRAMs (less than one quarter of the available NetFPGA-10G BRAMs). It is able to sustain 800Mbps per port throughputs for 1500B packets with less than 0.3 microsecond latency, even during a DoS attack. With additional logic and memory resources, the required validation and switching operations scale to port speeds in excess of 10Gbps and links with more than 10,000 active flows.

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