📋 HTTP Headers

Kontroller HTTP headers og sikkerhedsscore

What Are HTTP Security Headers?

HTTP security headers are directives sent by web servers that instruct browsers how to handle content. They provide an additional layer of security against common web vulnerabilities.

Essential Security Headers

  • Strict-Transport-Security (HSTS): Forces HTTPS connections Forces HTTPS connections
  • Content-Security-Policy (CSP): Prevents XSS and injection attacks Prevents XSS and injection attacks
  • X-Frame-Options: Protects against clickjacking Protects against clickjacking
  • X-Content-Type-Options: Prevents MIME sniffing Prevents MIME sniffing
  • Referrer-Policy: Styrer referrer-information Controls referrer information
  • Permissions-Policy: Begrænser browserfunktioner Restricts browser features

Forstå vores sikkerhedsscore

Vi vurderer dine headers fra A+ til F baseret på tilstedeværelsen og konfigurationen af kritiske sikkerheds-headers. En A+ karakter betyder, at alle anbefalede headers er korrekt konfigureret.

HTTP Security Headers Checker analyzes security-related response headers protecting against XSS, clickjacking, MIME sniffing, and protocol downgrade attacks.

Key Facts

  • Only 10% of top 1M sites have proper CSP
  • HSTS preloading protects from first visit
  • X-Frame-Options prevents 90%+ of clickjacking
  • Proper headers prevent 80% of common web attacks

Frequently Asked Questions

What is Content-Security-Policy?

CSP controls which resources browsers can load. The most powerful defense against XSS attacks.

What is HSTS?

Forces browsers to always use HTTPS, preventing protocol downgrade attacks and cookie hijacking.

Why low security grade?

Usually missing CSP, HSTS, X-Frame-Options, X-Content-Type-Options, or Referrer-Policy headers.

How to add security headers?

In Apache .htaccess, Nginx server block, or CDN dashboard (Cloudflare, Vercel, Netlify).

Related Security Tools

🔬 HTTP Debug & URL Inspector 🔒 SSL-certifikat 📌 SSL Pinning Generator 📡 Ping