521 Response Code Error code 521 commonly known as Error 521 Web server is down occurs when a website s server refuses a connection request It typically means the server is offline or actively refusing connections Error 521 occurs specifically on websites that use Cloudflare
To resolve Cloudflare s Error Code 521 deactivate Apache modules like mod reqtimeout and mod antiloris that may block Cloudflare s IPs and ensure Port 443 is enabled for secure communication Verify server activity by pinging it and clear server cache to eliminate data issues Cloudflare returns a Cloudflare branded HTTP 502 or 504 error when your origin web server responds with a standard HTTP 502 bad gateway or 504 gateway timeout error Resolution Contact your hosting provider to troubleshoot these common causes at
521 Response Code
521 Response Code
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The error message Error 521 Web server is down indicates an issue with the server That is Cloudflare s error message when the origin server does not respond to Cloudflare s request This guide explains common causes and provides methods to troubleshoot and resolve error 521 Prerequisites Want to fix error 521 on your website This guide explains common causes and provides methods to troubleshoot and resolve error 521
The Error 521 message indicating that the server is down appears when you attempt to access your website There are various reasons for this error ranging from a simple server overload to more complex issues with your hosting provider What is the 521 HTTP Status Code The 521 status code is part of the HTTP protocol and it means Web Server Is Down It s returned by a proxy CDN Content Delivery Network or similar intermediary when trying to access a target server that is down or unable to handle the request
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What is an Error Code 521 The Error Code 521 or Error 521 Web Server is Down is a response status code which tells you the abrupt status of a website and it is not Error code 521 or Error 521 Web server is down is an error your visitors see if Cloudflare can t access your website s server In other words your visitors can reach the servers of your content delivery network CDN but the CDN can t reach you
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Error code 521 commonly known as Error 521 Web server is down occurs when a website s server refuses a connection request It typically means the server is offline or actively refusing connections Error 521 occurs specifically on websites that use Cloudflare
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To resolve Cloudflare s Error Code 521 deactivate Apache modules like mod reqtimeout and mod antiloris that may block Cloudflare s IPs and ensure Port 443 is enabled for secure communication Verify server activity by pinging it and clear server cache to eliminate data issues
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