Electronics and Telecommunications Research Institute

Gaeil Ahn

Ki-Young Kim

Jong Soo Jang

An apparatus for protecting legitimate traffic from DoS and DDoS attacks has a high-priority () and a low-priority () queue. Besides, a queue information table () has STT (Source-based Traffic Trunk) service queue information of a specific packet. A queue coordinator () updates the queue information table () based on a load of a provided STT and a load of the high-priority queue (). A packet classifier () receives a packet from the network access unit (), investigates an STT service queue of the packet from the queue information table (), selectively transfers the packet to the high-priority () or the low-priority () queue and provides information on the packet to the queue coordinator (). A buffer () buffers outputs of the high-priority () and the low-priority () queue and provides outputs to the network () to be protected.

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Daejeon, South Korea

Gaeil Ahn