一种基于软交换的NAT穿越方案  

A NAT Traversing Solution Based On Softswitch

作　　者：李唐平[1] 陶宏才[1] 

机构地区：[1]西南交通大学信息科学与技术学院,成都610031

出　　处：《信息通信》2008年第6期61-64,共4页Information & Communications

摘　　要：VoIP技术已经广泛应用于企业级的语音业务,但是为了安全性和节省IP地址的使用,目前大量的企业和局域网都采用Firewall/NAT技术连接到Internet。针对IPv4地址资源短缺情况下实现业务网络间互通存在的问题,提出一种应用软交换技术控制网络地址转换网关(NATGW)的解决方案,以解决电信业务在不同网络间的互通问题,方案主要涉及两个设备:软交换机和NAT网关。比较了传统的NAT的穿越方案,并介绍和比较了较新的ALG和RSIP穿越方式,描述了各种穿越方法的穿越机制,分析了各种方法的优缺点。VolP is widely used as a main voice service on Internet. Whereas considering the security and IP addresses saving, most companies adopt Firewall/NAT to connect to the lnternet. Based on the problem which derives from the contradiction between the connection of network and the lack of resources, The article proposed the solution that applies the technology of Softswitch to control the gateway （NATGW） of NAT. The solution mainly involves two equipments： Soft- Switch and NAT gateway. The main NAT traversing methods are analysed, and focusing on the ALG and RSIP traversing methods newly brought forward, comparison is made.

关 键 词：软交换 NAT 转换 RSIP 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]