Cloud WAF (Cloud web application firewall) is a professional website security  service. Utilizing its multi-dimensional defense mechanisms, WAF protects websites against malicious web attacks such as: SQL injection, Cross-site scripting(XSS), command and code injection, sensitive file access, malicious crawler, etc. It can effectively ward off various common web attacks listed by OWASP and filter massive malicious CC attacks, prevent website asset data leakage, and ensure the security and availability of website service.