What does Cloudflare error code 525 mean?

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Grade: Education Subject: Support
What does Cloudflare error code 525 mean?
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Error code 525, 'SSL Handshake Failed', indicates that a connection between Cloudflare and your origin server failed during the SSL/TLS handshake process. This usually means there's an issue with the SSL certificate on your origin server, preventing Cloudflare from securely connecting to it. It's a server-side error, meaning the problem isn't with Cloudflare's network, but with your server's configuration.