基于协议分析的Ipv6网络入侵检测系统的研究

Research About Intrusion Detection System of IPv6 Based on Protocol Analysis Technology

从协议分析技术入手,围绕Ipv6网络的新特点,构筑了基于协议分析技术的Ipv6网络入侵检测系统的结构模型,并对实现方案作了具体的研究。在保持原有IPv4入侵检测系统检测引擎优点的基础上,挖掘IPv6特性,深入研究下一代网络体系结构,采用Ngrep解决了IPv6下的数据捕获问题,为IDS的进一步发展积累了一些经验。对协议分析的流程和基于数据挖掘的特征数据库的动态更新做了较详细的研究,对入侵检测系统的平台移植进行了有益的探索。

Transmission characteristics of Gaussian pulses in single-mode fibers were analyzed through studying NLS equation, the influence of GVD, TOD and SPM on pulse-width expansion were investigated and corresponding curves were given. The results indicated that under the premise of considering factors above, the shape of pulse generates expansion, amplitude decline, shape distortion and oscillatory trailing. The results presented in this paper is of value in studying the influence of optical channel on system BER.