Abstract Software Defined Networking (SDN) has emerged as a new network architecture for
dealing with network dynamics through software-enabled control. While SDN is promoting
many new network applications, security has become an important concern. This paper
provides an extensive survey on SDN security. We discuss the security threats to SDN
according to their effects, ie, Spoofing, Tampering, Repudiation, Information disclosure,
Denial of Service, and Elevation of Privilege. We also review a wide range of SDN security …

Software defined networking (SDN) decouples the network control and data planes. The
network intelligence and state are logically centralized and the underlying network
infrastructure is abstracted from applications. SDN enhances network security by means of
global visibility of the network state where a conflict can be easily resolved from the logically
centralized control plane. Hence, the SDN architecture empowers networks to actively
monitor traffic and diagnose threats to facilitates network forensics, security policy alteration …