无结构P2P系统中一种UDP协议穿透NAT技术的研究  

Research on NAT Traversing based on UDP Protocol Under Unstructured P2P Network

作　　者：蔡祖恋[1] 刘克剑[1] 甘春娇[1] 张英英[2] 

机构地区：[1]西华大学数学与计算机学院,四川成都610039 [2]湖南科技大学网络信息中心,湖南湘潭411201

出　　处：《西华大学学报（自然科学版）》2009年第4期58-61,共4页Journal of Xihua University:Natural Science Edition

基　　金：四川省教育厅重点项目(08ZA023)

摘　　要：简要介绍NAT技术的原理以及NAT对P2P通信的影响,指出影响NAT穿透的关键因素。分析了目前几种NAT的穿透技术,提出在基于超结点的无结构P2P网络中,以超结点为媒介协助完成UDP的穿透,实现处于不同NAT内部的结点之间的通信。The wide use of P2P technology provides a more convenient and efficient way for network users to share resources and some multimedia applications, but it has been restricted by NAT. This paper describes the principle of NAT technology, analyzes the infection of NAT for P2P communications, points out the critical factors of NAT traversing. After analyzing a variety of traversing NAT technologies, and with the help of supernodes, an approach to assist UDP packets traversing NAT is put forward. By this means, the nodes hidden behind the different NATs can directly communicate with each other.

关 键 词：P2P NAT UDP 穿透 超结点 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]