DISTRIBUTED DENIAL OF SERVICE ATTACKS SIMULATION AND DEFENSE

In recent years, Distributed Denial of Service Attack has increased in frequency, complexity, and power. Now DDoS has become a major threat to widely used Internet based services. As became the main cause of the deterioration of services where sometimes completely disabled. DDoS attacks are one of the most important security issues affecting networks and disrupting services for legitimate users. Attackers lunch this type of attack for a variety of reasons and specific targets, either blackmail, information sale, or theft. This paper generally introduces the concept of denial of service attack (DoS). The concept of DDoS attack has been clarified. The DDoS types have been studied with the SYN flood attack being implemented in practice way. In particular, simulate the DDoS attacks and defense against DDoS attacks using Slowloris tool. The DDos attack targeted two things: IP addresses and websites of the victim to flood specific address and flood a website. There are two types of flooding: http with TCP connection and Ping requests.