This study focuses on a new approach to outsourcing web application security, which is the distributed web application firewall in the cloud. The solution is an on-demand service that filters and monitors traffic and delivers it to the application. Simple to deploy, it takes advantage of the concept of cloud information and therefore ensures high availability and high performance in security, delivery and migration of DDoS attacks due to its capabilities and resources. The centralization of the latter is a strategic aspect for the continuous evolution and professional monitoring of security, in fact, it promotes a supervised and common learning