一种H.323通信穿越对称NAT的方法

本文提出了一种对称NAT的穿透方法,可以在不改变现有NAT设备软件及其配置的前提下,解决两个私有网络IP电话终端通信问题.该方法借助于代理网守中继两个话机之间的信令和媒体流,通过对H.323协议的适当扩展完成代理网守与终端话机通信信道的建立.实践表明,该方法能够达到预期目标.

An Approach to Symmetric NAT Traversal for H.323

A method of traversing symmetric NAT with H.323 is presented, which aims at the problem of communication between two IP phones in the different private networks respectively and has not to modify the software and configuration in the existing NAT devices. The proxy gatekeeper relays the signal flows and the media flows between two IP phones. It extends H.323 protocol a little and acts as the second IP phone to each of the actual IP phones that are attempting to communicate with each other. Experiments prove that this model reaches the expected goal.