P2P网络中基于UDP穿透NAT技术的研究

Research on Using UDP to Traverse NAT Under P2P Network Environment

网络中存在的Network Address Translation(NAT)使得Peer-to-Peer(P2P)通信存在极大的困难,因此穿透NAT已经成为P2P应用必须面对和解决的问题。本文介绍了几种穿透NAT的技术并分析了其各自的特点,指出了影响NAT穿透的关键因素,并给出了采用简单却健壮性很好的UDP打洞技术穿透NAT的实例,最后得出结论。

Network Address Translation （NAT） causes difficulties for peer-to-peer （P2P） communication, and therefore NAT traversal has become a problem to be faced and salved by P2P application . The paper introduces several NAT traversal techniques and analyses their respective characteristics, notes the key factors affecting NAT traversal, and has given a good example using one of the simplest but most robust NAT traversal techniques. At last. the naner draws the conclusion.