Causes

• Error 524 indicates that Cloudflare successfully made a TCP connection to the origin web server, but the origin did not provide a HTTP response before the default 100 second connection timed out.

Fixes

Step 1: Contact NET Support

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

• A long-running process on the origin web server.
• An overloaded origin web server.

Step 2: Move Processes Behind A Subdomain

If you regularly run HTTP requests that take over 100 seconds to complete (for example large data exports), move those processes behind a subdomain not proxied (grey clouded) in the Cloudflare DNS app.

Step 3: Ensure Timeout Is Set

If occurs for a domain using Cloudflare Railgun, ensure the timeout is set higher than the default of 30 seconds and restart the railgun service.