基于Linux的网络防火墙设计方法

AbstractWith the rapid development of Internet,the network is more and morebecome an integral part of People's daily life,and subsequently leads to theproblem of network security that has become increasingly prominent,as peoplehave concerns.In order to construct a relatively safe environment in a secure environment,toensure the subnet environment of computer security operation and not infringed bythe external,in view of the current network problems,this paper mainly introducesseveral popular firewall technology and how it works.On the basis of the basicconcept,role and basic types behind a firewall,we mainly analys its workingprinciple,which is based on the working principle of packet filter firewall in eachversion of Linux,and based on that,we analyzed in detail and achieve the structureenvironment of iptables technology which appears in version 2.4 of Linux,and use itto test and deploy a safer network environment,which will make computers caneffectively guard against external network attack behavior in an unsafe networkenvironment,let whole network has a higher level of security.Key Words:firewall、Network Security、Linux、Packetfiltering technology.Iptables