基于嵌入式系统的网络硬件防火墙的实现

随着网络的普及,安全问题正在威胁着每一个网络用户。由于黑客攻击和信息泄漏等安全问题并不像病毒那样直截了当的对系统进行破坏,而是故意隐藏自己的行动,所以往往不能引起人们的重视。但是,一旦网络安全问题发生,通常会带来严重的后果。目前最常见的网络安全防范工具是软件防火墙,这种防火墙的缺点就是占用有限系统资源,随着防火墙的等级提高,该防火墙将严重阻碍通信的质量。本文对网络防火墙的具体分析,来讨论通过嵌入式系统来实现网络硬件防火墙的过程。

Acquirement of a hardware network Firewall based on LPC2210

As Internet is becoming more and more popularization, the security of every network users are threatened by hacks. Luckily, net-work firewall can be used as a barrier to prevent the spread of the attack. Software firewall is based on PC operation system such as Win-dows and it must share system resources with other user tasks. But hardware firewall is a self-governed embedded system and it can filter certain network packets.This paper analyze the architecture of firewall in detail, and use a concrete example to intruduce the realization of a hardware firewall based on embedded system.