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本文主要讨论了Linux防火墙的安全机制和原理,以及如何利用Linux建立和管理防火墙;并着重分析了包过滤方法、透明代理、IP伪装以及ipfwadm命令的使用,指出了Linux防火墙的不足及其发展方向;最后给出了一个应用实例。
This paper mainly discusses the security mechanism and principle of Linux firewall and how to use Linux to establish and manage the firewall. It also analyzes the packet filtering method, transparent proxy, IP masquerading and the use of ipfwadm command, points out the shortcomings of Linux firewall and its development direction Finally, an application example is given.