An HTTP 522 error, a Cloudflare-specific error, means a “Connection Timed Out” when Cloudflare tries to connect to the origin web server and doesn’t receive a response within a certain timeframe.
Here’s a more detailed explanation:
- What it is:The 522 error is an HTTP status code that indicates a problem with the connection between Cloudflare (a Content Delivery Network) and the origin web server.
- Why it happens:It occurs when Cloudflare, acting as a proxy, attempts to connect to the website’s server but doesn’t receive a response within the expected time.
- Common Causes:
- Server Overload: The origin server might be under heavy load and unable to respond quickly enough.
- Blocked Cloudflare IP Addresses: The origin server’s firewall or configuration might be blocking Cloudflare’s IP addresses.
- Incorrect Origin IP Address: The IP address of the origin server might be incorrectly configured in Cloudflare’s DNS settings.
- TCP Handshake Failure: The TCP 3-way handshake between Cloudflare and the origin server might fail, preventing a connection from being established.
- Troubleshooting:
- Check Server Logs: Review your web server logs for any errors or issues that might be causing the timeout.
- Verify Cloudflare IP Addresses: Ensure that Cloudflare’s IP addresses are not blocked by your web server’s firewall or configuration.
- Check Origin Server Status: Make sure that the origin server is running and accessible.
- Temporarily Pause Cloudflare: If you suspect a problem with Cloudflare, you can temporarily pause Cloudflare’s proxy to see if the issue resolves.
- Contact Cloudflare Support: If you’re still experiencing issues, contact Cloudflare support for assistance.
