Research and Application of Firewall In Network

Firewall is the most widely used network security product,while its security test starts late,which falls far behind its technology development.The article first introduces the basic network architecture and its advantages and disadvantages,as well as the main technical types of firewall,then describes in detail the packet filtering firewall-work principle,proposes the security test requirement of firewall equipment,and based on which describes the method and main items of firewall equipment security test,and finally gives the security policy design of firewall in practical apphcation based on a thorough analysis of the principle of network attack software.