What is the name of the domain?
What is the error number?
What is the error message?
Web Server Is Returning an Unknown Error
What is the issue you’re encountering
Random visitors encounter 520 errors, but the origin server shows no issues. The server works fine when accessed directly, and the errors disappear when Cloudflare is paused.
What steps have you taken to resolve the issue?
Reviewed firewall rules and server logs but found no clear pattern.
Increased server timeout settings to rule out timeouts.
Verified the origin server is consistently online and responding.
What are the steps to reproduce the issue?
Load the website under normal conditions via Cloudflare.
Randomly, certain requests trigger a 520 error.
Pausing Cloudflare eliminates the issue entirely.
