DDoS Mitigation in Cloud by Using C.I.T.F.A.

Cloud computing provides huge computing services to the business for improving the organizational growth. Basic requirement needed for this technology is Internet but provides higher capability when compared to the Internet. Cloud computing is a combination of computation, software, data access and also provides storage services. In Cloud, storage of data and the location of stored data are not known to the user. Cloud computing adopts the concept of virtualization, service oriented architecture, autonomic, and utility computing. The cloud has more advantages and easy to implement with any business logics. Cloud delivers services from different data sources and servers located on different geographical location but the user gets single point of view from the cloud service. In cloud environment, cloud servers providing requested cloud services, sometimes may crash after receiving huge amount of requests. This is exactly what happens in a distributed denial of service (DDoS) attack[1]. It prevents the authentic clients from getting service. DDoS attack is accompanied by IP Spoofing so as to hide the source of flooding and to make every request look different. In fact, DDoS attacks have grown in size, complexity and frequency over the past decade and many organizations are now being targeted. It’s not just high-profile, politically-connected organizations that are at risk. Any enterprise which uses the Internet to sell products, offer services or to access cloud based data and applications can become a target. In this paper, we present an algorithm known as CITFA(Cloud Intruder Time Frequency algorithm). Sample selected as experiment are simulated on cloudsim and subsequent results are shown.