IP音视频穿越NAT技术的研究  

Research on Technology for VoIP to Traverse NAT

作　　者：李航[1] 马林华[1] 

机构地区：[1]空军工程大学工程学院,陕西西安710038

出　　处：《通信技术》2008年第3期65-67,87,共4页Communications Technology

摘　　要：音视频流媒体技术在近些年的发展非常迅速,己经广泛应用于互联网上。但是为了安全性和节省IP地址,目前大量的企业和局域网都采用防火墙/NAT(Network Address Translation)技术连接到因特网。基于目前NAT技术的原理及应用,文中分析并指出了由于NAT技术的特性造成的主机无法主动与处于NAT后方的主机通讯的问题,结合穿越NAT技术的现状,分析了各种穿越技术的优劣点,并提出了一种新的穿越方案,丰富了穿越NAT的方法,提供了关于穿越NAT防火墙技术的参考。The video audio frequency stream media technology is developed rapidly in recent year, which has been already used abroad on Internet. However, because of security and for saving IP address, many corporations and LANs are connected with Internet by using Firewall/NAT （Network Address Translation）. Based on the theory and application of NAT technology, problems that because of NAT characteristics, the host can not actively build communications to the NAT rear host are analyzed and pointed out. Combining current situation of the technology for through NAT, this paper analyzes the advantage and disadvantage of various technologies for through NAT, gives a new plan for though NAT, and proposes a scheme for practical application.

关 键 词：音视频流媒体技术 NAT技术 穿越NAT技术 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]