SSL error when trying to connect to the origin server

Website, Application, Performance
1

What is the name of the domain?

What is the error message?

Cloudflare is unable to establish an SSL connection to the origin server

What is the issue you’re encountering

New Webflow site not showing

Screenshot of the error

image (2).png
image (2).png974×736 16.9 KB

2

Hello, 525 errors indicate that the SSL handshake between Cloudflare and the origin web server failed. Error 525 occurs when these two conditions are true:

  1. The SSL handshake :arrow_upper_right: fails between Cloudflare and the origin web server, and
  2. Full or Full (Strict) SSL is set in the Overview tab of your Cloudflare SSL/TLS app.

Note

If your hosting provider frequently changes your origin web server’s IP address, refer to Cloudflare’s documentation on dynamic DNS updates.

Resolution

Contact your hosting provider to exclude the following common causes at your origin web server:

  • No valid SSL certificate installed
  • Port 443 (or other custom secure port) is not open
  • No SNI support
  • The cipher suites presented by Cloudflare to the origin do not match the cipher suites supported by the origin web server
3

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