前 言随着国内XX大型国电企业的信息网络系统建设的不断发展,Internet网络的接入和IP电话语音系统的建立,网络环境和网络应用已经成为该国电企业各级机构行政职能、处理业务、开展工作的重要基础设施和必要手段。随着网络互连的机构越来越多,信息网络的安全隐患问题也越来越严 Preface With the continuous development of the construction of information network system of domestic large-scale state-owned power companies, the access of Internet network and the establishment of IP telephony system, the network environment and network applications have become the administrative functions of institutions at all levels of the state power enterprises, handling the business and carrying out Important infrastructure and necessary means of work. With more and more institutions interconnecting networks, the security risks of information networks are becoming more and more serious