HTTP 103 Early Hints vs 523 Origin Is Unreachable
HTTP 103 (Early Hints) is a 1xx Informational response, while 523 (Origin Is Unreachable) is a 5xx Server Error response. 103 indicates that used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response. In contrast, 523 means that cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route).
Description
Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
Quand vous le voyez
When a server wants the browser to start loading CSS/JS before the full response is ready.
Comment résoudre
No fix needed. This optimization helps speed up page loading.
Description
Cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route).
Quand vous le voyez
When Cloudflare's DNS for the origin fails to resolve.
Comment résoudre
Verify DNS records in Cloudflare dashboard. Check origin server's IP address.
Différences clés
103 is a 1xx Informational response, while 523 is a 5xx Server Error response.
HTTP 103: Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
HTTP 523: Cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route).
You encounter 103 when when a server wants the browser to start loading CSS/JS before the full response is ready.
You encounter 523 when when Cloudflare's DNS for the origin fails to resolve.
Quand utiliser lequel
For 103 (Early Hints): No fix needed. This optimization helps speed up page loading. For 523 (Origin Is Unreachable): Verify DNS records in Cloudflare dashboard. Check origin server's IP address.