Investigating Impact of DDoS Attack and CPA Targeting CDN Caches

The amount of content delivery traffic on the Internet has been increasing. To make Content Delivery Network (CDN) effective, it is necessary to clarify the attack methods targeting CDN cache servers and prevent them effectively. Therefore, in this paper, we evaluate and investigate the influence of attacks against CDN cache servers on the effect of increasing the response time. Many providers deploy multiple cache servers to prevent DDoS attacks and provide better services. In this paper, we investigate the impact of the two types of attacks, the Distributed Denial of Service (DDoS) attack and the Cache Pollution Attack (CPA), against the CDN cache servers. With the CDN model consisting of multiple cache servers, we evaluate the effect of the DDoS and CPA targeting CDN caches under different attacking scenarios, and we analyze the factors that affect the attack effect. Finally, we find several factors that affect the effect of the attacks, and CDN provider can focus on these factors to prevent the threat of cyber attacks on CDNs.