Network Security is one of the core functions of Network Secure. It can safely detect traffic passing through Network Secure, block malicious behaviors, and perform correlated blocks. A closed-loop mechanism is established through prediction before an event, safety protection during the event, and detection and response after the event. Network Security policies mainly include web application firewalls, intrusion protection, content security, tamper protection, botnet detection, DDoS protection, service model learning and supervision, and risk analysis.