Linux平台下iptables防火墙技术分析和实现

The iptables Firewall Technology and Implementation based on Linux System

Internet技术飞速发展,现在的网络安全漏洞越来越多。因此,虽然创建一个防火墙并不能保证系统100%安全,但却是绝对必要的。防火墙的目的就是将破坏网络安全的行为拦在网络之外,保证自己的电脑文档不被盗取或破坏。防火墙提供了一种重要的记录和审计功能;它们经常可以向管理员提供一些情况概要,提供有关通过防火墙的传输流的类型和数量,以及有多少次试图闯入防火墙的企图等信息。

Internet technology rapid development,now more and more network security vulnerabilities.Thus,while creating a firewall and can not guarantee 100% security system,it is absolutely necessary.The purpose of a firewall is to undermine network security barrier in the network,to ensure their computers are not stolen or destroyed documents.Firewalls provide an important record and audit functions;they can often provide a summary of the administrator to provide the transport stream through the firewall of the type and quantity,and the number of times trying to break into the firewall attempts and other information.