Principal Analysis and Defense Technologies of Application Layer DDos Attacks

With DDoS attack detection underlying technology continues to mature and improve more and more application-layer DDoS attack.Due to the complexity of the application layer protocols, application-layer DDoS attack is subtler and more destructive, more difficult to detect.Flow characteristics of the network traffic characteristics and access through the application layer DDoS attack in normal user, the request is using by a fixed time interval within the time window as a feature and page.Through normal user and boot access exhibit some different characteristics of the session clustering analysis to detect the attack, after experiments show that the detection algorithm has better detection performance.A Distributed Denial of Service (DDoS) attack is an attempt to make an online service unavailable by overwhelming it with traffic from multiple sources.The approach with the traditional alignment Net-DDoS attack planned divergent samples is belonging to a network level, and therefore, and it can be used as necessary to fill the existing DDoS protection systems in high-rise for the Web service of supplied security guarantees.