Networksecurity network system is presented, including hardware, software, and itstransmission in the network information security, network security threatsmainly include: software vulnerabilities, improper configuration, safetyconsciousness is not strong, virus, hacker attacks, etc. Is not only afirewall, network security is not anti-virus, intrusion monitoring, firewall,identity authentication, encryption, and other products of simple stack, butfrom the system to the application, from the device to the service ofrelatively complete, the system of the combination of security products.