HTTP Security Headers: Configuration Guide and Testing Checklist ສຳລັບວິສາຫະກິດລາວ

HTTP security headers provide an additional layer of defence that's relatively simple to implement: Content-Security-Policy (CSP) prevents XSS by specifying which sources can load scripts and other resources. Strict-Transport-Security (HSTS) ensures browsers always connect via HTTPS. X-Content-Type-Options prevents MIME-type sniffing. X-Frame-Options prevents clickjacking through iframe embedding. Referrer-Policy controls what information is sent in the Referer header. Permissions-Policy restricts browser feature access (camera, microphone, geolocation). Testing evaluates whether these headers are present, correctly configured, and effectively prevent the attacks they're designed to stop. Missing or misconfigured security headers are among the most common findings in web application assessments — and among the easiest to remediate.