Web Application Firewall
N/A
Web应用防火墙
Web Application Firewall · N/A · Web应用防火墙 · waf · WAF · application firewall · Cybersecurity · web · defense · httpCybersecurityWAF application firewall/waf/
Also known as: WAF, application firewall
Last updated August 9, 2026
Definition
A web application firewall (WAF) filters HTTP traffic to block common web attacks like SQL injection and cross-site scripting before they reach the app.
Real-World Example
A WAF rule rejecting requests with classic SQLi payloads protects a login form even if the code has a missed bug.
References
Related terms
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