DDoS (Distributed Denial of Service) attacks have evolved for over the last 10 years becoming more sophisticated and significant threat to critical public-facing web operations. Ultimately, the perpetrators’ motivations are more alarming for a wide range of organizations including online money-making operations, critical public infrastructures, military networks, enterprise networks, e-government operations and agencies. Any organization that conducts online business or has in distinctive investments in their online brand and reputation is a potential target. While many organizations are highly concerned about the DDoS threat, few organizations have specific tools for detecting and defeating the attacks completely. Despite popular belief, the traditional stand-alone measures such as Firewall/IPS systems, reliance on Internet Service Providers (ISP) or cloud scrubbing centers which are implemented within most organizations, are insufficient to detect and mitigate today’s highly sophisticated attacks.