Adenuga-Taiwo, OluwadamilolaShah Heydari, Shahram2016-10-122022-03-292016-10-122022-03-292016-10-12https://hdl.handle.net/10155/685Software Defined Networking (SDN) enables organizations strengthen their network architectures, reduce running costs and enable sophisticated network functions. The adoption of software defined networks by top industry players like CISCO, IBM and Ericsson implies its increased application in mainstream networks and real world applications. Security challenges in SDN networks are quite similar to the traditional networks where many attacks occur at the control layer. This issue is further escalated by the fact that information is synchronized between the data layer, which houses the network devices; and the control layer, in which the SDN controller operates. The control layer contains policies for operating the data layer, providing a single point of failure on the network as a whole. This technical report examines a number of security challenges within the control layer of ONOS SDN platform – an open source initiative under the Linux foundation for carrier-grade software-defined networking, which is quickly gaining popularity within the industry. In particular, we examine ONOS vulnerability Northbound and Southbound DOS and MITM attacks in a test environment and provide observation, analysis and some defensive measures.enSoftware-Defined NetworkingONOSNetwork SecuritySDN ControllerTechnical Report