传统的数据中心网络难以为指定业务的网络带宽需求提供保障.基于SDN(Software Defined Network)的网络带宽保障系统通过在Floodlight控制器中开发网络带宽保障服务,并采用MVC(Model View Controller)模式设计出一个客户端软件,能够实现...传统的数据中心网络难以为指定业务的网络带宽需求提供保障.基于SDN(Software Defined Network)的网络带宽保障系统通过在Floodlight控制器中开发网络带宽保障服务,并采用MVC(Model View Controller)模式设计出一个客户端软件,能够实现用户对网络状态的实时监控和对带宽保障策略的灵活调度.在Mininet搭建的虚拟网络环境中进行测试的结果显示,该系统能够实时监控网络状态、灵活调度带宽保障策略,进而准确有效地保障网络中指定业务的带宽需求.展开更多
为了解决软件定义网络(software defined networking,SDN)架构面临的安全挑战,针对SDN网络架构中的安全审计环节,将传统网络中的安全审计解决方案与SDN网络集中控制的特性相结合,依托Floodlight控制器设计并实现适用于SDN网络环境的安...为了解决软件定义网络(software defined networking,SDN)架构面临的安全挑战,针对SDN网络架构中的安全审计环节,将传统网络中的安全审计解决方案与SDN网络集中控制的特性相结合,依托Floodlight控制器设计并实现适用于SDN网络环境的安全审计系统,包括安全审计事件的收集、分析、存储、响应等功能.提出一种针对分布式拒绝服务(distributed denial of service,DDo S)攻击的攻击回溯算法对安全审计事件进行追溯,确定出DDo S攻击发起者及僵尸主机集合.同时,采用滑动窗口分割算法从安全审计事件中提取出用户行为序列模式,基于Levenshtein算法计算用户行为序列模式之间的相似度,并根据用户当前行为和历史行为的相似度来判断是否出现可疑的攻击行为.经实验验证,该系统能准确地回溯出DDo S攻击发生时被控的僵尸主机集合及攻击者,并且可以有效地检测出用户攻击行为.展开更多
By allocating IP address and changing IP address in source and destination hosts, network address space randomization is committed to construct a dynamic and heterogeneous network to decrease the attacking possibility...By allocating IP address and changing IP address in source and destination hosts, network address space randomization is committed to construct a dynamic and heterogeneous network to decrease the attacking possibility and predictability. The research mainly deploys the features of OpenFlow network including data plane and control plane decoupling, centralized control of the network and dynamic updating of forwarding rules, combines the advantages of the network address space randomization technology with the features of the OpenFlow network, and designs a novel resolution towards IP conversion in Floodlight controller. The research can help improve the unpredictability and decrease the possibility of worm attacking and IP sniffing by IP allocation.展开更多
文摘传统的数据中心网络难以为指定业务的网络带宽需求提供保障.基于SDN(Software Defined Network)的网络带宽保障系统通过在Floodlight控制器中开发网络带宽保障服务,并采用MVC(Model View Controller)模式设计出一个客户端软件,能够实现用户对网络状态的实时监控和对带宽保障策略的灵活调度.在Mininet搭建的虚拟网络环境中进行测试的结果显示,该系统能够实时监控网络状态、灵活调度带宽保障策略,进而准确有效地保障网络中指定业务的带宽需求.
文摘为了解决软件定义网络(software defined networking,SDN)架构面临的安全挑战,针对SDN网络架构中的安全审计环节,将传统网络中的安全审计解决方案与SDN网络集中控制的特性相结合,依托Floodlight控制器设计并实现适用于SDN网络环境的安全审计系统,包括安全审计事件的收集、分析、存储、响应等功能.提出一种针对分布式拒绝服务(distributed denial of service,DDo S)攻击的攻击回溯算法对安全审计事件进行追溯,确定出DDo S攻击发起者及僵尸主机集合.同时,采用滑动窗口分割算法从安全审计事件中提取出用户行为序列模式,基于Levenshtein算法计算用户行为序列模式之间的相似度,并根据用户当前行为和历史行为的相似度来判断是否出现可疑的攻击行为.经实验验证,该系统能准确地回溯出DDo S攻击发生时被控的僵尸主机集合及攻击者,并且可以有效地检测出用户攻击行为.
文摘By allocating IP address and changing IP address in source and destination hosts, network address space randomization is committed to construct a dynamic and heterogeneous network to decrease the attacking possibility and predictability. The research mainly deploys the features of OpenFlow network including data plane and control plane decoupling, centralized control of the network and dynamic updating of forwarding rules, combines the advantages of the network address space randomization technology with the features of the OpenFlow network, and designs a novel resolution towards IP conversion in Floodlight controller. The research can help improve the unpredictability and decrease the possibility of worm attacking and IP sniffing by IP allocation.
