NSFocus Information Technology web application firewall (WAF for short) uses customer assets as the basis for organizational web security solutions, uses a complete protection system combining black and white list mechanisms, links various web security detection methods into a complete solution through detailed configuration, and integrates them into a mature DDoS attack defense mechanism. It can resist various web security threats and denial of service attacks such as OWASP Top 10 in IPV4, IPV6, and mixed environments, and provides transparency to various organizations at low operating costs Line deployment, route bypass deployment, image deployment, and cloud deployment can be easily and quickly deployed online to protect your web applications from current and future security threats.