在P2P网络环境下基于UDP协议穿越NAT的研究

Study of Based on UDP Protocol to Traverse NAT Under P2P Network Environment

随着IPV4地址逐步被用完,互联网转而使用NAT技术解决了的IP地址紧缺问题,但同时给P2P网络通信带了很大的困难.针对P2P网络中NAT穿越的问题,首先本文分析了NAT对P2P网络通信影响后,提出了几种穿越NAT的方法.其次运用UDP打洞技术使UDP协议来达到P2P网络穿越NAT.最后举例说明了UDP打洞技术的工作流程.结果证实UDP打洞技术可适用于P2P网络,可以很好地确保网络安全和鲁棒性.

With the IPV4 address gradually being exhausted, Intemet instead of using NAT technology to solve the problem of IP address shortage, At the same time to the P2P network traffic with great difficulties. NAT traversal for P2P network problems, First, This paper analyzes the impact of NAT to P2P network trafficand proposed several methods of NAT traversal. Second, the use of UDP protocol UDP hole technology allows the UDP hole to achieve theP2P network traverse NAT. Finally, an example of a UDP hole technology workflow. The results confirm that UDP punching technology is applied to P2P network, which can ensure the security and the robust of network as well.