Fog-based SDN for DDOS Attack Mitigation in IoT Systems: A Survey

Abstract

Distributed Denial-of-Service (DDoS) attacks constitute a severe threat to academia and industry, with unfettered access by end-users to resources from cloud data center services. DDoS attacks, discussed and resolved with varying degrees of success by researchers in the recent past, have been detected and mitigated successfully in SDN environments. Given the rapid rise of edge devices like sensors, cloud storage access has become a serious concern, with fog computing stepping in to play a major role in sharing such resources as links between the cloud and edge computing devices. The fog is the middle layer of cloud and edge devices. This paper deals with DDoS attack detection and mitigation approaches between IoT devices and a cloud server via an SDN controller in a fog layer. It also discusses the roles and responsibilities of fog computing in an SDN-based testbed, as well as the challenges involved in DDoS attack detection using a fog- based SDN to protect the cloud server from edge devices.