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arXiv 1703.06992cs.NIcs.CR
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SDN与传统网络控制平面安全框架及对比分析

A Framework and Comparative Analysis of Control Plane Security of SDN and Conventional Networks

AbdelRahman Abdou, Paul C. van Oorschot, Tao Wan

摘要:

软件定义网络在外部实体中实现网络控制平面,而不是如在常规网络中那样在每个单独的设备中实现网络控制平面。这种架构差异意味着对基本网络属性所需的控制功能的不同设计,例如,环路预防和链路冗余。我们探讨了这些差异如何重新定义SDN控制平面中的安全弱点,并提供了一个比较分析框架,重点关注典型生产网络所需的基本网络属性。这使得能够分析SDN和传统网络的控制平面如何提供这些属性,并比较安全风险和缓解措施。尽管架构上的差异,我们发现类似的,但不相同的,暴露在控制平面的安全性,如果两个网络范例提供相同的网络属性,并在相同的威胁模型下进行分析。然而,防御措施各不相同; SDN不能依赖基于边缘的过滤来保护其控制平面,而这可以说是传统网络中的主要防御。我们具体的安全分析表明,一个分布式的SDN架构,支持容错和一致性检查是重要的SDN控制平面的安全。我们的分析方法可能是独立的利益,为未来的安全分析的SDN和传统网络。

英文摘要:

Software defined networking implements the network control plane in an external entity, rather than in each individual device as in conventional networks. This architectural difference implies a different design for control functions necessary for essential network properties, e.g., loop prevention and link redundancy. We explore how such differences redefine the security weaknesses in the SDN control plane and provide a framework for comparative analysis which focuses on essential network properties required by typical production networks. This enables analysis of how these properties are delivered by the control planes of SDN and conventional networks, and to compare security risks and mitigations. Despite the architectural difference, we find similar, but not identical, exposures in control plane security if both network paradigms provide the same network properties and are analyzed under the same threat model. However, defenses vary; SDN cannot depend on edge based filtering to protect its control plane, while this is arguably the primary defense in conventional networks. Our concrete security analysis suggests that a distributed SDN architecture that supports fault tolerance and consistency checks is important for SDN control plane security. Our analysis methodology may be of independent interest for future security analysis of SDN and conventional networks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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