Error 523 Origin Is Unreachable means the CDN cannot reach your origin server at all. The network connection fails before any response is received. This is a connectivity issue. It usually points to DNS errors, incorrect IP configuration, firewall blocks, or server downtime. Quick Fix Verify your server is online and reachable via its IP … Read more
Error 520 Unknown Error means the CDN received an unexpected or empty response from the origin server. The connection succeeds, but the reply is invalid. This error is vague by design. It signals that something broke between your server and the proxy layer. The fix requires systematic checking. Quick Fix Reload the page and clear … Read more
Error 522 Connection Timed Out means a CDN could reach your network but did not receive a response from the origin server in time. The connection starts successfully, then stalls. This is usually caused by overloaded servers, blocked requests, or network routing problems. Fixing it quickly is critical because prolonged timeouts can impact rankings, user … Read more
Error 521 Web Server Is Down means a CDN cannot connect to your origin server. The request reaches the network, but the server refuses the connection. This usually points to firewall rules, server downtime, or hosting issues. Fixing it fast is critical because prolonged outages can affect rankings, traffic, and revenue. ⚡ Quick Fix Confirm … Read more
