Configure HTTP security headers including CSP, HSTS, X-Frame-Options, and XSS protection. Use when hardening web applications against common attacks.

Security Headers Configuration Table of Contents [Overview]( overview) [When to Use]( when to use) [Quick Start]( quick start) [Reference Guides]( reference guides) [Best Practices]( best practices) Overview Implement comprehensive HTTP security headers to protect web applications from XSS, clickjacking, MIME sniffing, and other browser based attacks. When to Use New web application deployment Security audit remediation Compliance requirements Browser security hardening API security Static site protection Quick Start Minimal working example: Reference Guides Detailed implementations in the references/ directory: Guide Contents [Node.js/Express Security Headers](references/nodejsexpress security headers.md) Node.js/Express Security Headers [Nginx Security Headers Configuration](references/nginx security headers configuration.md) Nginx Security Headers Configuration [Python Flask Security Headers](references/python flask security headers.md) Python Flask Security Headers [Apache .htaccess Configuration](references/apache htaccess configuration.md) Apache .htaccess Configuration [Security Headers Testing Script](references/security headers testing script.md) Security Headers Testing Script Best Practices ✅ DO Use HTTPS everywhere Implement strict CSP Enable HSTS with preload Block framing with X Frame Options Prevent MIME sniffing Report CSP violations Test headers regularly Use security scanners ❌ DON'T Allow unsafe inline in CSP Skip HSTS on subdomains Ignore CSP violations Use overly permissive policies Forget to test changes

security-headers-configuration