用NAT技术构造小区智能化系统安全体系

Design of Security Architecture of District Intelligent System Based on NAT

以基于宽带网络的小区智能化系统入手,给出了安全系统的设计目标及整体构造方案。概要介绍了网络地址转换(NAT)的基本原理,着重对端口地址转换技术进行了分析与设计,构造了动态端口映射的Hash函数;同时实现了反向端口地址转换。最后,根据动态端口转换方案,在小区智能化系统中实现了系统的负载平衡与容错。

Start from District Intelligent System based on broadband network, the design object and whole construct schemes of its security system is presented. The fundamentals of Network Address Translation are introduced.The analysis and design of Port Address Translation are mainly discussed. The Hash Function of Dynamic Port Address Translation(DPAT) is constructed,and the module of Reversed Port Address Translation(RPAT) is presented. According to the scheme of DPAT, a practical implementation of loading balancing and fault tolerance is presented.