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随着互联网的飞速发展,网络安全逐渐成为一个潜在的巨大问题。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。防火墙是网络安全的关键技术。其核心思想是在不安全的网络环境中构造一个相对安全的子网环境。采用防火墙是网络安全最主要、最核心、最有效的手段之一。文章重点讨论防火墙定义、防火墙的工作原理、防火墙的功能、防火墙的安全功能、防火墙技术及防火墙的主要优点和缺点。
With the rapid development of the Internet, network security has gradually become a potentially huge problem. Many companies use firewalls to protect their own servers or data. Firewall is the key technology of network security. The core idea is to construct a relatively secure subnet environment in an insecure network environment. Firewall is the most important network security, the core, one of the most effective means. The article focuses on the main advantages and disadvantages of firewall definition, firewall working principle, firewall function, firewall security function, firewall technology and firewall.