525525 SSL Handshake Failed
Cloudflare could not complete an SSL/TLS handshake with the origin server.
101The server is switching protocols as requested by the client via an Upgrade header.
The client requested a protocol upgrade, commonly from HTTP/1.1 to WebSocket (via Upgrade: websocket) or to HTTP/2. The server agreed to switch.
No action needed. This is expected behavior during WebSocket or HTTP/2 upgrades. If you see this unexpectedly, verify your client is intentionally sending an Upgrade header.
525Cloudflare could not complete an SSL/TLS handshake with the origin server.
403The server understood the request but refuses to authorize it. Unlike 401, re-authenticating will not help.
100The server has received the request headers and the client should proceed to send the request body.
303The response to the request can be found at a different URL using a GET method.
417The server cannot meet the expectation specified in the Expect request header.
102The server has received and is processing the request, but no response is available yet (WebDAV).