es include ZDnet, Etrade an Excite, which crashes due to heavy bombardment of data with over 1 gigabit data Downloaded: 4/15/2022 9:44:49 AM Nova Southeastern University IP Address: 137.52.76.29 Analysis of Issues in SDN Security and Solutions per second which causes server to respond to the legitimate requests. These are some of the examples of DoS attacks on big giants. Apart from the DoS attacks to these companies, there are several other cases where DoS attacks create a major havoc. The examples are the DoS attack on the revolutionary armed forces of Columbia on 2nd july, 2008. The attack was made by Columbian national forces to bring out their hostages. These intruders carried a series of DoS and Man in the Middle (MITM) attack. This attack lead to release of fifteen most crucial hostages. Thus, this attack was unique in its type where several hostages were freed without using of any arms or ammunition. Confidentiality, integrity, availability of information, non-repudiation and authentication are some of the basic properties for a secure communication network. There is a need to secure a data from malicious attack or unintentional damage within the network in order to provide a secure communication transactions across the network. Gude, Koponen, Pettit, Pfaff, Casado, McKeown, and Shenker (2008) propose SANE architecture which was centered in a logical centralized controller which will be responsible for host authentication and enforcement of policy within the network. Ethane in his paper extended the work of Gude and proposes to control the network through the use of two components that are centralized controller and ethane switches. Where centralized controller are responsible for enforcement of global policies and ethane switches works as flow table which will forward the packet based on flow table. Talking in terms of current SDN architecture, there are applications needed for providing various types of services. This can be resulted in breach of entire network which will be a serious threat in terms of