第三方不完全代理的TCP穿透NAT的技术研究

发布时间：2018-03-17 03:34

本文选题：NAT穿透　切入点：TCP　出处：《湖南师范大学》2014年硕士论文　论文类型：学位论文

【摘要】：NAT穿透是一种与处于使用了NAT设备的私有TCP/IP网络中的主机之间建立连接的技术,其应用广泛,一直受到业内的关注。基于UDP的穿透技术已经基本成熟,研究主要集中在基于TCP的穿透。目前研究较为常用的TCP穿透NAT技术是基于第三方代理服务器的NAT穿透,就是在第三方代理的协助下完成两个终端的NAT穿透。本文研究出一种取缔TCP穿透NAT中的第三方代理服务器技术——使用IMAP和SMTP来替代第三方代理服务器。通过一些互联网常用服务ip138网站来获取公网IP地址和Email来完成终端之间的通信,利用TCP协议的特征来实现端口预测,借助WinPcap来处理TCP数据包。实验结果表明,本文探讨的在不基于第三方代理服务器的情况下,借助互联网常用服务来完成TCP的NAT穿透方案是可行的。
[Abstract]:NAT penetration is a technology to establish a connection with the host computer in a private TCP/IP network with a NAT device. It has been widely used and has been concerned by the industry. The penetration technology based on UDP has been basically mature. The research focuses on the penetration based on TCP. At present, the commonly used TCP penetration NAT technology is the NAT penetration based on the third-party proxy server, which is to complete the NAT penetration of two terminals with the assistance of the third-party agent. In this paper, we develop a new technique of outlawing the third-party proxy server in TCP penetrating NAT-using IMAP and SMTP to replace the third-party proxy server. We can obtain IP address of public network and Email through some common Internet service ip138 website. Communication between terminals, The characteristic of TCP protocol is used to realize port prediction and WinPcap is used to process TCP data packet. The experimental results show that the NAT penetration scheme of TCP based on common Internet services is feasible without using a third-party proxy server in this paper.
【学位授予单位】：湖南师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.04

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