Analysis and realization of the audit of firewall

Firewall , as a kind of network security tools, has been widely used. And the log of firewall is the gist for administrator of networks to exam firewall and status of networks running. By the audit of firewall log, administrator of networks can analyze all information across firewall , and find hidden trouble of networks security. This article discusses the audit target of firewall and implement a log audit system based on the discussion.