Abstract: In recent years, most of the organizations in the world have increasingly realized the importance of cloud platforms. The cloud computing is one of the developing segmenting of IT industry as well as a promising concept to the end users. However Cloud Computing has more applications but there are many challenges that are facing by a Cloud environment. In recent years, the major attacks in cloud are a Distributed denial of service (DDoS) attacks on the catalog of cloud attacks. DDoS can have serious penalty for the companies which are dependent on the internet service for their production. Thus, it is important to reduce a force of DDoS is one of the latest issues. This paper focus on the impact of DDoS attacks in cloud and the NEIF technique available to overcome with the issue.