The research of firewall technology in computer network security

This paper analyzes the computer network security features and the main threat, synthesis the firewall technology of current domestic and international, on the basis of various firewalls´ principles, advantages and shortcomings. Through the synthesis and compare of various techniques, in-depth study of the main factors affection firewall performance, combined with the network status quo of Heilongjiang Provincial Center, this paper researches the firewall technology of the actual application in the computer network security, then refers the new technique called tight coupling firewall, finally the article leads to a lack of firewall technology and the direction of its development.