WAF Web Protection

A Web Application Firewall (WAF) is a security appliance or service that monitors, filters, and blocks malicious HTTP and HTTPS traffic destined for web applications. WAFs sit at the edge (either cloud-hosted or on-premise) and inspect request payloads for attacks like SQL injection, cross-site scripting (XSS), command injection, and DDoS patterns before traffic reaches your application servers. WAFs use signature-based detection, behavioral analysis, and machine learning to classify requests as benign or hostile. They're deployed by every major web property (banks, e-commerce platforms, SaaS) and are often required by compliance frameworks (PCI-DSS, SOC 2).