ICS35.240.01 L67DB32 江苏省地方标准 DB32/T3514.4—2019 电子政务外网建设规范 第4部分:安全实施指南 ConstructionSpecificationsofE-GovernmentNetwork Part4：Guidelinesforsafetyimplementation 2019-01-12发布 2019-01-30实施 江苏省市场监督管理局 发布 DB32/T3514.4—2019 I目  次 前言.....................................................................................................................................................................IV 1范围.................................................................................................................................................................1 2规范性引用文件.............................................................................................................................................1 3术语和定义.....................................................................................................................................................1 4总体要求.........................................................................................................................................................2 5建设原则.........................................................................................................................................................2 5.1等级保护原则.........................................................................................................................................2 5.2多重防护原则.........................................................................................................................................2 5.3分级管理原则.........................................................................................................................................3 5.4规范管理原则.........................................................................................................................................3 6网络安全架构及安全域划分.........................................................................................................................3 6.1网络安全架构及安全域划分原则.........................................................................................................3 6.2网络安全架构划分.................................................................................................................................3 6.2.1网络安全架构划分概述.................................................................................................................3 6.2.2广域网安全.....................................................................................................................................3 6.2.3城域网安全.....................................................................................................................................3 6.2.4部门接入网安全.............................................................................................................................3 6.3业务区划分.............................................................................................................................................4 6.4安全域划分.............................................................................................................................................4 6.4.1总体要求.........................................................................................................................................4 6.4.2互联网接入域.................................................................................................................................4 6.4.3安全管理域.....................................................................................................................................5 6.4.4数据中心域.....................................................................................................................................5 7网络互联安全要求.........................................................................................................................................5 7.1广域网互联.............................................................................................................................................5 7.2广域网与城域网互联....................................................................