Introduction - If you have any usage issues, please Google them yourself
summary of the computer network with in-depth social, economic, defense, science and technology and culture, and other fields, Computer system security is becoming increasingly complex and prominent. sharing resources and networks division also increased the network received threats and the possibility of attack, So based on packet filtering plus state inspection firewall protection system has become a tool for network security. This paper introduces a set of data packets filtering, log, agent services in the integration of complex firewall system, focuses on the use of technology to achieve VC data packet filtering software. Keywords composite firewall packet filtering, network security