ON PERFORMANCE ANALYSIS OF SDN NETWORK WITH CONTROLLER- BASED FIREWALL
Software-Defined Networking is a new network paradigm that allows managing network services by separating data and control planes. Herein network planning and traffic management are performed by software what makes installation of new network services, such as routing, resource management and security more simple and agile. Existing defense mechanisms, particularly SDN-based firewalls, face new and SDN-specific challenges in successfully enforcing security policies in the underlying network. In this paper we identify issues related to SDN-based firewalls and introduce a model of SDN-network in the form of a queuing network to calculate mean delay time.