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随着国内外计算机技术和通信技术的飞速发展,网络安全问题也越来越重要,防火墙是网络安全策略的有机组成部分,它通过控制和监测网络之间的信息交换与访问行为来实现对网络安全的有效管理。由于每一个用户的要求和所处的环境都不一样,LINUX防火墙会根据用户的设置实现各种不同的功能。但一般说来,包过滤、代理、IP伪装、提供日志审计、防火墙数据库的备份等这些功能是大多数用户最常用到的。最后根据实际应用,给出具体设计思路,可以使用户选择合适的软硬件平台和相应的防火墙设计原理,自己开发出一套能够满足要求的防火墙系统。
With the rapid development of computer technology and communication technology both at home and abroad, the problem of network security is becoming more and more important. Firewall is an integral part of network security strategy. It realizes network security by controlling and monitoring the information exchange and access between networks Safe and effective management. Because each user’s requirements and the environment in which they are not the same, LINUX firewall will be based on the user’s settings to achieve a variety of different functions. However, in general, packet filtering, proxy, IP masquerading, log audit, firewall database backup, etc. are most commonly used by most users. Finally, according to the practical application, given the specific design ideas, users can choose the appropriate hardware and software platforms and the corresponding firewall design principles, to develop a set to meet the requirements of the firewall system.