HTTP 208 Already Reported vs 521 Web Server Is Down
HTTP 208 (Already Reported) is a 2xx Success response, while 521 (Web Server Is Down) is a 5xx Server Error response. 208 indicates that used inside a DAV: propstat response element to avoid enumerating internal members of multiple bindings to the same collection repeatedly. In contrast, 521 means that cloudflare-specific. The origin server refused the connection.
Description
Used inside a DAV: propstat response element to avoid enumerating internal members of multiple bindings to the same collection repeatedly.
When You See It
In WebDAV responses to avoid duplicate listings.
How to Fix
No fix needed. This prevents redundant data in multi-status responses.
Description
Cloudflare-specific. The origin server refused the connection.
When You See It
When Cloudflare can't establish a TCP connection to the origin server.
How to Fix
Check that the origin server is running and the firewall allows Cloudflare IPs.
Key Differences
208 is a 2xx Success response, while 521 is a 5xx Server Error response.
HTTP 208: Used inside a DAV: propstat response element to avoid enumerating internal members of multiple bindings to the same collection repeatedly.
HTTP 521: Cloudflare-specific. The origin server refused the connection.
You encounter 208 when in WebDAV responses to avoid duplicate listings.
You encounter 521 when when Cloudflare can't establish a TCP connection to the origin server.
When to Use Which
For 208 (Already Reported): No fix needed. This prevents redundant data in multi-status responses. For 521 (Web Server Is Down): Check that the origin server is running and the firewall allows Cloudflare IPs.