Abstract: The software-defined network (SDN) and OpenFlow development made easierto manage the policy-driven network. Before this policy management are handled through manual configurations. The device has made the things complexity and takes more time to transfer messages. They use low-level language for configuration. Manual configuration is handled by network controller is being replaced by SDN. We proposed opensec, an OpenFlow security framework that allows network security operator to implement security policies written in the human readable language. Using opensec, openflow controller converts security policies into series of messages. Opensec automatically detects the malicious traffic. Opensec automatically reacts to the security alerts based on pre-defined network policies. Our framework improves Vulnerabilities detection and prevention and Transmission time.

Keywords: Openflow, Software Defined Network, Opensec, Policy-Driven Network, Security Policies.