QS-Ware: The Middleware for Providing QoS and Secure Ability to Web Server

摘要

This paper presents the design, implementation, and evaluation of QS-ware (middleware between web server and operating system) that provides QoS ability and secure ability to protect from network overloading and DDOS attacks. There are various kinds of research to provide QoS to Web server and DDOS defense technologies. But, there is no system to consider both of Qos and DDOS defense for web server. Researches considering only QoS, can not solve the problem of high rated incoming traffic caused by traffic crowds or DDOS attacks. And most DDOS defense mechanisms have not considered special web application program. So, if attackers generated malicious traffic to web server using general HTTP requests, DDOS defense system could not detect it. QS-ware is the middleware that provide reasonable performance and self-DDOS detecting mechanism. Because QS-ware is middleware, there is no necessary to change of web server and operating system. We have made simulation environment for testing and verifying our approach. Simulation results demonstrate that QS-ware can provide QoS ability and stop DDOS attacks efficiently.