基于自适应代理技术的H.323视频会议防火墙  

Firewall Based on the Technology of Adaptive Proxy for H.323 Video Conference

作　　者：胡瑞敏[1] 曹雪松[1] 陈水仙[1] 

机构地区：[1]武汉大学多媒体网络通信工程湖北省重点实验室,武汉430079

出　　处：《光学与光电技术》2005年第1期46-49,共4页Optics & Optoelectronic Technology

摘　　要：在视频会议中,如何保证 H323/SIP 数据穿越 NAT/防火墙的策略问题是多媒体通信领域的研究热点。提出了将基于 H.323 协议的应用层网关直接与防火墙的动态检测技术相结合的方案,这一方案通过防火墙自身解析ASN.1 协议包,来对数据进行跟踪检测及合法性校验,并能自适应选择检测手段。这种自适应代理防火墙的应用对于视频会议系统的研究发展及其安全保障都具有很重要的意义。In the video conference, it is a hot research problem that how to assure that H323/SIP data packets get through NAT/Firewall in the field of multimedia network communication. In the article, a scheme which applies the technology of the H.323 application gateway to the dynamically detecting firewall is proposed. The firewall can detect the data by analyzing the ASN.1 packets, and it also achieves adaptive proxy detection. It is very meaningful that the adaptive proxy firewall applied in the multimedia network communication for the development of video conference system and insurance of the conference security.

关 键 词：H.323 NAT 视频会议 防火墙 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]