Cloud computing is a new computational paradigm that found to offer many services easily with the increasing number of users, and offers an innovative business model for organizations to adopt IT without upfront investment. The cloud computing considers as good storage that handling with different users that access the cloud from different times and locations because the information that stored on it does not need any space and does not need transferring from one place to another. Despite the potential gains achieved from the cloud computing, the model security is still questionable which impacts the cloud model adoption. One of the most common concerns for users is the availability and data management process in the cloud. Thus, this thesis focused on how to permanently available data to users and prevent the denial of service. This thesis attempts to investigate the web application that indicates the multiple resource management policies to implement different user demands to better support the implementation of resource allocation for cloud computing. In addition to, it investigates multi-level solutions specifically designed for cloud and its features will be better compared to conventional DoS solutions. Keywords: Cloud Computing, Risk of Cloud, DDoS attacks, Resource Management.