Abstract:
Network address translators (NAT) can resolve the problem of globally unique IP address deficiency. But NAT causes difficulties for peer-to-peer (P2P) communication, since it drops any unsolicited incoming message. This paper analyzes the prevail solution that enables a connection between hosts located behind NATs based on UDP protocol , and provides a better solution based on proxies .
Key words:
peer-to-peer network,
transmission control protocol,
user datagram protocol,
network address translation,
connection
摘要： 公共IP地址的匮乏促使人们引入了网络地址转换技术(NAT)，但是由于NAT只允许从内部网络往外发起的连接请求，丢弃了所有不是由内部发起的来自外部的连接，因此两个处于不同NAT后面的主机无法直接建立有效连接。该文分析了目前流行的利用UDP穿透NAT实现处于不同内网中的主机之间互连的技术，提出了一种依靠代理技术实现主机互连的方法，以提高端对端通信中的安全性。
关键词:
P2P网络,
传输控制协议,
用户数据报协议,
网络地址转换,
连接
CLC Number:
MA Xi-jun; SHEN Xu-jie. Connection Approach Between Hosts Located Behind NATs[J]. Computer Engineering, 2007, 33(23): 142-144.
马溪骏;沈旭杰. 不同内网中主机之间的互连方法[J]. 计算机工程, 2007, 33(23): 142-144.