HTTP 100 Continue vs 526 Invalid SSL Certificate
HTTP 100 (Continue) is a 1xx Informational response, while 526 (Invalid SSL Certificate) is a 5xx Server Error response. 100 indicates that the server has received the request headers and the client should proceed to send the request body. This lets the client know it can continue with the request or abort if the headers were rejected. In contrast, 526 means that cloudflare-specific. The origin's SSL certificate could not be validated.
Descripción
The server has received the request headers and the client should proceed to send the request body. This lets the client know it can continue with the request or abort if the headers were rejected.
Cuándo lo verás
When a client sends an Expect: 100-continue header, the server responds with 100 before the client sends the body.
Cómo solucionarlo
This is an interim response — no fix needed. The client should continue sending the request body.
Descripción
Cloudflare-specific. The origin's SSL certificate could not be validated.
Cuándo lo verás
When using Cloudflare Full (Strict) mode with an invalid origin certificate.
Cómo solucionarlo
Install a valid SSL certificate on the origin, or use Cloudflare Origin CA certificate.
Diferencias clave
100 is a 1xx Informational response, while 526 is a 5xx Server Error response.
HTTP 100: The server has received the request headers and the client should proceed to send the request body. This lets the client know it can continue with the request or abort if the headers were rejected.
HTTP 526: Cloudflare-specific. The origin's SSL certificate could not be validated.
You encounter 100 when when a client sends an Expect: 100-continue header, the server responds with 100 before the client sends the body.
You encounter 526 when when using Cloudflare Full (Strict) mode with an invalid origin certificate.
Cuándo usar cada uno
For 100 (Continue): This is an interim response — no fix needed. The client should continue sending the request body. For 526 (Invalid SSL Certificate): Install a valid SSL certificate on the origin, or use Cloudflare Origin CA certificate.