How to Fix Error 521: Step-by-Step Guide

Learn how to troubleshoot and resolve Error 521 with our easy guide for web server accessibility.

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Error 521 occurs when the web server is down or not reachable. To fix this: 1) Ensure your web server is running and accessible. 2) Check for firewall settings that might be blocking requests from Cloudflare. 3) Verify DNS settings to ensure your domain points to the correct IP address of your server.

FAQs & Answers

  1. What does Error 521 indicate? Error 521 indicates that the web server is down or unreachable.
  2. How can I tell if my web server is down? You can check your web server's status using online tools or by attempting to access other web applications hosted on the same server.
  3. Can firewall settings cause Error 521? Yes, firewall settings can block requests from Cloudflare, leading to Error 521.
  4. How do I update my DNS settings? You can update your DNS settings through your domain registrar's control panel or hosting provider's DNS management interface.

Watch More

For further insights on web server issues, check out our other guides on common web errors like 403 Forbidden and 500 Internal Server Error.

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