An Improved Defense Mechanism Based on Packet Filtering to Mitigate DDOS Attack in Cloud Computing Environment

Cloud computing is a revolution in information technology industry due to its higher performance, accessibility, low cost and many other services compared to traditional online computing and storage methods. Cloud computing system can be easily intruded by various cyber attack such as DOS and DDOS attack. These attacks make cloud services unavailable to the legitimate users. In this paper a filtering method is proposed which combines the confidence based filtering method and with the hop count filtering method in order to mitigate the DDoS attack in cloud computing environment. The proposed method is validated by simulating it on MATLAB and has been found better as compared to the existing techniques.