← All Status Codes
522
Connection Timed Out
☁️ Cloudflare Critical Risk

📖 What Is HTTP 522?

Cloudflare-specific. The TCP connection to the origin server timed out. Cloudflare could not establish a connection within 15 seconds.

🛡️ Security Implications

May indicate the origin is overloaded or under attack. SYN flood attacks can cause connection timeouts.

🔍 Common Causes

Origin server overloaded, network issue between Cloudflare and origin, firewall rate-limiting Cloudflare, keepalive disabled.

🔧 How to Fix

Check origin server load. Whitelist Cloudflare IPs. Enable TCP keepalive on the origin. Check for network routing issues.

🖥️ How to Check

curl -I -o /dev/null -w "%{http_code}" https://example.com

🔗 Related Cloudflare Codes

520
Web Server Error
521
Web Server Is Down
523
Origin Is Unreachable
524
A Timeout Occurred
525
SSL Handshake Failed
526
Invalid SSL Certificate
530
Origin DNS Error
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