Optimal Network Reconfiguration for Software Defined Networks Using Shuffle-Based Online MTD

Jin B. Hong, Seunghyun Yoon, Hyuk Lim, Dong Seong Kim
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引用次数: 23

Abstract

A Software Defined Network (SDN) provides functionalities for modifying network configurations. To enhance security, Moving Target Defense (MTD) techniques are deployed in the networks to continuously change the attack surface. In this paper, we realize an MTD system by exploiting the SDN functionality to optimally reconfigure the network topology. We introduce a novel problem Shuffle Assignment Problem (SAP), the reconfiguration of a network topology for enhanced security, and we show how to compute the optimal solution for small-sized networks and the near-optimal solution for large-sized networks using a heuristic method. In addition, we propose a shuffle-based online MTD mechanism, which periodically reconfigures the network topology to continuously change the attack surface. This mechanism also selects an optimal countermeasure using our proposed topological distance metric in real-time when an attack is detected. We demonstrate the feasibility and the effectiveness of our proposed solutions through experimental analysis on an SDN testbed and simulations.
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基于Shuffle-Based在线MTD的软件定义网络最优网络重构
软件定义网络(SDN)提供修改网络配置的功能。为了提高网络的安全性,移动目标防御(MTD)技术被部署到网络中,使攻击面不断变化。在本文中,我们通过利用SDN功能来优化重新配置网络拓扑来实现MTD系统。我们介绍了一个新的问题Shuffle Assignment problem (SAP),一个网络拓扑结构的重新配置以增强安全性,我们展示了如何使用启发式方法计算小型网络的最优解和大型网络的近最优解。此外,我们提出了一种基于shuffle的在线MTD机制,该机制定期重新配置网络拓扑以不断改变攻击面。当检测到攻击时,该机制还使用我们提出的拓扑距离度量实时选择最佳对策。通过SDN试验台的实验分析和仿真,验证了所提方案的可行性和有效性。
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