分析了网络中存在的不安全因素,提出了网内用户对内部网资源访问和外部网用户对内部网资源访问的访问控制策略,并给出了网内访问和网间访问的访问控制模型。 访问控制;;网络安全;;防火墙 This paper analyzes the unsafe factors existing in the network, puts forward the access control strategy of the intranet users accessing the intranet resources and the extranet users accessing the intranet resources, and gives the access control model of intranet access and internet access. Access control ;; network security ;; firewall