What Is a WAF and Why Your Website Needs One in 2026

A Web Application Firewall (WAF) sits between your web application and the internet, inspecting every HTTP request for malicious payloads before they reach your server.

Why Traditional Firewalls Are Not Enough

Network firewalls filter traffic based on IP addresses, ports, and protocols. They cannot inspect HTTP content. An attacker sending SQL injection via HTTPS will pass through a network firewall. A WAF recognizes this and blocks it.

How WAFs Work

• -Signature-based: Matches against known attack patterns (OWASP CRS).
• -Anomaly detection: Flags deviations from normal traffic patterns.
• -AI/ML scoring: Machine learning detects zero-day exploits that bypass rules.

Common Attacks a WAF Blocks

AI-Powered WAFs: The Next Generation

Visibilitiez uses adaptive AI threat scoring that combines behavioral pattern recognition with contextual semantic analysis. Each request gets a 0-100 threat score with configurable actions.