防火墙在网络安全中的应用研究

防火墙是一种行之有效的网络安全机制,它是在网络的内部与外部之间实施安全防范的系统。文章阐述了防火墙技术的功能和关键技术,并探讨了如何在实际中实施改进防火墙。在本篇论文中采用了对比论证的方法,目的在于有所比较。论文在理论论述的同时也注重对所述内容加以举例说明,"构建基于Linux的防火墙"一节即为前述理论的实践。

The Research of The Firewall's Applications in The Network

Everyone knows that the firewall is a valid defrence that react on the safe of network in and out.This article tells about the theory of the technic,the function and the sort about firewall.It also shows how to put the firewall in practice.In this article the author list the differences between the firewall and give examples about it.build the firewall based on Linux is the practice about the theory and the author's ideas is included.