摘要
随着计算机网络的普及,网络安全问题已受到重视。在众多的安全产品中,防火墙产品无疑是保障网络安全的第一道防线,很多企业为了保障自身服务器或数据安全都采用了防火墙。文中着重介绍了四种防火墙技术的实现过程以及技术的功能扩展,并分别介绍了技术的优缺点。
Along with the computer network popularization, the network security question has caused attention. In the multitudinous security product, the firewall product is undacstedly the safeguards of the network, in order to safeguard server, or the data security many enterprises have all used the firewall. This articls introduces four kind of firewalls technologies realization process as well as the technical function expansion, their advantages and disadvantages.
关键词
网络安全
防火墙
包过滤
应用代理
状态监视
network security
firewall
the package filters
using proxy
condition surveillance
