在计算机网络日益深入生活各个领域的今天,人类社会也逐步过渡到以网络为基础的社会,人们在充分享受网络带给我们快乐和便利的同时,也忽视了其中的安全问题。当一连串的黑客攻击事件发生后,网络安全问题受到了政府和公众的广泛关注,作为保护内部网的一种有效手段,防火墙技术目 Today, as the computer network deepens its life in all fields, human society has gradually shifted to a web-based society. People fully enjoy the joy and convenience that the Internet brings to us while ignoring the security issues. When a series of hacker attacks occur, the issue of network security has been widely concerned by the government and the public. As an effective means of protecting the intranet, the firewall technology