Research Of Intranet Host Firewall

For the Intranet, more and more network attacks come inside the Intranet , the current most firewalls are based on the border , already can't good meet demand. The Host Firewall can defend the Intranet against the attacks from the internal network in a large extent , but the related techniques need to be studied.In this paper ,the shortages and limitations of the Perimeter Firewall and current Host Firewall are analyzed ,the current network attacks and the methods defending against them are analyzed and discussed, the strategies of the network security in the Intranet are discussed, the scarcities of the current applications for the Host Firewall in the Intranet are analyzed , a kind of Intranet Host Firewall model based on the techniques of TCP/IP packets filter ,VPN and IDS is designed and discussed deeply.The Host Firewall system designed is reliable , practical and more secure , it can defend the Intranet against more network attacks, and it can detect some unknown network attacks. This paper is beneficial for the study of the Intranet network security and the applications of the Intranet host firewalls.