Flooding Based DDoS Attacks and Their Influence on Web Services

In present era, the world is highly dependent on the Internet and it is considered as main infrastructure of the global information society. Therefore, the Availability of information and services is very critical for the socio-economic growth of the society. However, the inherent vulnerabilities of the Internet architecture provide opportunities for a lot of attacks on its infrastructure and services. Distributed denial-of-service (DDoS) attack is one such kind of attack, which poses an immense threat to the availability of the Internet. These attacks not only congest a Server by their attack, but also affect the performance of other Servers on the entire network also, which are connected to Backbone Link directly or indirectly. To measure the impact of DDoS attack on web services, precise and comprehensive DDoS impact metrics are required. In this paper, we have used emulation to generate network topology. Legitimate and attack traffic is generated on this emulated topology. The impact of attack traffic is measured in terms of metrics such as Throughput, Response Time, Normal Packet Survival Ratio and Backbone Link Utilization.