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On the effectiveness of secure overlay forwarding systems under intelligent distributed DoS attacks

机译：智能分布式DoS攻击下安全覆盖转发系统的有效性

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摘要

In the framework of a set of clients communicating with a critical server over the Internet, a recent approach to protect communication from distributed denial of service (DDoS) attacks involves the usage of overlay systems. SOS, MAYDAY, and I3 are such systems. The architecture of these systems consists of a set of overlay nodes that serve as intermediate forwarders between the clients and the server, thereby controlling access to the server. Although such systems perform well under random DDoS attacks, it is questionable whether they are resilient to intelligent DDoS attacks which aim to infer architectures of the systems to launch more efficient attacks. In this paper, we define several intelligent DDoS attack models and develop analytical/simulation approaches to study the impacts of architectural design features of such, overlay systems on the system performance in terms of path availability between clients and the server under attacks. Our data clearly demonstrate that the system performance is indeed sensitive to the architectural features and the different features interact with each other to impact overall system performance under intelligent DDoS attacks. Our observations provide important guidelines in the design of such secure overlay forwarding systems.
机译：在一组客户端通过Internet与关键服务器进行通信的框架中，一种用于保护通信免受分布式拒绝服务（DDoS）攻击的最新方法涉及使用覆盖系统。 SOS，MAYDAY和I3就是这样的系统。这些系统的体系结构由一组覆盖节点组成，这些覆盖节点充当客户端和服务器之间的中间转发器，从而控制对服务器的访问。尽管这样的系统在随机DDoS攻击下表现良好，但是它们是否对智能DDoS攻击具有弹性还是有疑问的，DDoS攻击旨在推断系统的体系结构以发起更有效的攻击。在本文中，我们定义了几种智能的DDoS攻击模型，并开发了分析/模拟方法来研究这种覆盖系统的体系结构设计功能对受攻击客户端和服务器之间的路径可用性的影响。我们的数据清楚地表明，系统性能确实对体系结构功能敏感，并且不同功能相互影响，从而在智能DDoS攻击下影响整体系统性能。我们的观察结果为此类安全覆盖转发系统的设计提供了重要指导。

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