Cyber Times International Journal of Technology & Management

DDoS Attacks also known as “Distributed Denial-of-Service”. Attacker use zombie computers for launch their attacks on a systems or web servers Distributed denial of service (DDoS) is one of the type of attack of computer network and internet today. DDoS attacks are among the most difficult problems to resolve online, especially, when the target is the Web server. Many protocols such as Domain Name System (DNS) have several security vulnerabilities and utilized by Botnet attackers. Botnet - based DDoS attacks that use DNS as a basic infrastructure to launch attack. Each and every organization desire to protect its services and their customer’s privacy by protecting them against these attacks, some may be difficult to detect which may bring down the name of the company.