HTTP 203 Non-Authoritative Information vs 521 Web Server Is Down
HTTP 203 (Non-Authoritative Information) is a 2xx Success response, while 521 (Web Server Is Down) is a 5xx Server Error response. 203 indicates that the response payload has been modified by a transforming proxy from the origin server's 200 response. In contrast, 521 means that cloudflare-specific. The origin server refused the connection.
Açıklama
The response payload has been modified by a transforming proxy from the origin server's 200 response.
Gördüğünüzde
When a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
Nasıl Düzeltilir
Check if a proxy is modifying the response. Access the origin directly if you need the original content.
Açıklama
Cloudflare-specific. The origin server refused the connection.
Gördüğünüzde
When Cloudflare can't establish a TCP connection to the origin server.
Nasıl Düzeltilir
Check that the origin server is running and the firewall allows Cloudflare IPs.
Temel Farklar
203 is a 2xx Success response, while 521 is a 5xx Server Error response.
HTTP 203: The response payload has been modified by a transforming proxy from the origin server's 200 response.
HTTP 521: Cloudflare-specific. The origin server refused the connection.
You encounter 203 when when a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
You encounter 521 when when Cloudflare can't establish a TCP connection to the origin server.
Hangisini Ne Zaman Kullanmalı
For 203 (Non-Authoritative Information): Check if a proxy is modifying the response. Access the origin directly if you need the original content. For 521 (Web Server Is Down): Check that the origin server is running and the firewall allows Cloudflare IPs.