HTTP 101 Switching Protocols vs 525 SSL Handshake Failed
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 525 (SSL Handshake Failed) is a 5xx Server Error response. 101 indicates that the server understands the Upgrade header field request and indicates which protocol it is switching to. In contrast, 525 means that cloudflare-specific. SSL/TLS handshake with the origin server failed.
Descrição
The server understands the Upgrade header field request and indicates which protocol it is switching to.
Quando você o vê
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
Como corrigir
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
Descrição
Cloudflare-specific. SSL/TLS handshake with the origin server failed.
Quando você o vê
When origin SSL certificate is expired, misconfigured, or incompatible.
Como corrigir
Check origin SSL certificate validity. Ensure TLS version compatibility. Renew expired certificates.
Diferenças principais
101 is a 1xx Informational response, while 525 is a 5xx Server Error response.
HTTP 101: The server understands the Upgrade header field request and indicates which protocol it is switching to.
HTTP 525: Cloudflare-specific. SSL/TLS handshake with the origin server failed.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 525 when when origin SSL certificate is expired, misconfigured, or incompatible.
Quando usar qual
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 525 (SSL Handshake Failed): Check origin SSL certificate validity. Ensure TLS version compatibility. Renew expired certificates.