基于探测对Symmetric NAT与端口受限NAT的穿透方案

Detection-based traversal solution for connection between symmetric NAT and port-restricted NAT

在采用P2P架构的网络音视频应用中,不可避免会涉及到NAT穿透的问题。IETF为此开发了STUN标准,但是STUN协议中提出的方案无法穿透SymmetricNAT。通过分析对称NAT原理以及一些实际网络中的NAT布署的情况,提出了基于探测的穿透方案。经过多种网络环境的测试,达到了预计的目标。

To resolve the problem of NAT traversal in the applications of audio and video based on P2P technology, STUN as a IETF standard was proposed. But it can＇t traverse the Symmetric NAT. A new solution to resolve the problem was presented by detection with the analysis of Symmetric NAT and the its deploy. Some tests were taken in real situations and the results reached the goal.