Mitigation of DoS in SDN Using Path Randomization

SDN is a recent blooming architecture which provides greater flexibility for the network professionals. SDN decouples the control logic from the forwarding devices, and the centralized controllers decide the forwarding rules in the network. In spite of the flexibility provided, it is vulnerable to many kinds of attacks. Our focus is on mitigating the denial-of-service attack on flow tables which can result in severe degradation of the network switches. In order to address this issue, we propose a path randomization technique and flow aggregation algorithm. The performance of the system has been evaluated in a simulation environment which has shown a positive result.