基于邮件协议的NAT穿越远程升级与控制系统  

Remote upgrade and control system of NAT crossing based on mail protocol

作　　者：陈磊[1] 张永刚[1] 周小林[1] 郑立荣[1] 

机构地区：[1]复旦大学信息科学与工程学院,上海200433

出　　处：《上海师范大学学报（自然科学版）》2017年第1期156-162,共7页Journal of Shanghai Normal University(Natural Sciences)

基　　金：国家科技支撑课题项目(2015BAD17B04)

摘　　要：提出了一种新的实现网络地址转换(NAT)穿越的方案:利用邮件服务器的POP3和SMTP协议传递相关IP地址和端口等信息,并通过"打洞"技术,实现客户端和设备结点之间的UDP连接.相比于利用程序服务器进行"打洞"从而实现NAT穿越的方案,该方案运营成本更低,系统稳定性更高,系统可移植性更强.基于该NAT穿越方案,结合多设备结点、多种网络环境的情况,引入固件升级模块,设计与实现了一个物联网智能设备的远程升级和控制系统,并对系统的稳健性进行了探讨.This paper proposes a new scheme which uses transmits information such as related IP address and port by the mail server POP3 and SMTP protocol to realize net address turning（NAT） crossing.The UDP connection between client and device node is realized by using ＂ burrow＂ technology.Compared to the scheme that uses procedure server to realize NAT crossing schemes by the ＂ burrow＂ technology,our scheme has advantages of saving operating costs,improving the stability of the system and enhancing the transferability of the system.With multiple equipment node,and a variety of network environment,we introduces the firmware update module,designs and realizes the remote upgrade and the control system of an intelligent device of Internet of Things based on the proposed scheme,and discusses the robustness of the system.

关 键 词：NAT穿越 点对点连接 POP3 SMTP UDP 

分 类 号：TN929.5[电子电信—通信与信息系统]