← All Status Codes
451
Unavailable For Legal Reasons
⚠️ Client Error
Medium Risk
📖 What Is HTTP 451?
The resource is unavailable due to legal demands (court order, government censorship, DMCA takedown). Named after the novel Fahrenheit 451.
🛡️ Security Implications
Used for GDPR compliance, DMCA takedowns, and government censorship. The response should include a Link header to the legal demand.
🔍 Common Causes
Court-ordered content removal, DMCA takedown, GDPR right-to-erasure, government censorship, sanctions compliance.
🔧 How to Fix
Contact the site operator or legal team. If you believe the takedown is wrong, file a counter-notice or appeal.
🖥️ How to Check
curl -I -o /dev/null -w "%{http_code}" https://example.com