Distributed Denial-of-Service (DDoS) attacks are a dangerous hazard to the web. On the other hand, the memory less quality of the Internet routing technique makes it enormously solid to trace back to the source of these attacks. In this paper, the authors recommend a novel efficient traceback technique for DDoS attacks that is based on entropy variations between ordinary and DDoS attack traffic, which is basically diverse from frequently used package marking techniques. In assessment to the existing DDoS traceback techniques, the projected approach possesses a number of advantages; it is memory non-intensive, proficiently scalable, full-bodied beside package effluence, and sovereign of attack traffic patterns. The outcome of broad experimental and simulation studies is presented to exhibit the usefulness and efficiency of the projected technique.