Websites of Turknet ISP customers cannot be accessed from Turkey

What is the name of the domain?

What is the error number?

521

What is the error message?

Web server is down

What is the issue you’re encountering

While different ISP customers from Turkey can access my website, customers belonging to Turknet ISP company cannot access my website from a certain IP address range.

What steps have you taken to resolve the issue?

I created manual roles from the rules tab on Cloudflare and lowered the Turkish resources visitors security filter to the lowest level, but it did not work.

Hi,

Thank you for reaching out us. I’m sorry that you’re experiencing issues.

Upon further checking halisbayancuk.com, I can see that 521 errors are no longer happening since 27th of October. Can you please confirm if you’re still facing issues? If so, please refer to our docs here: Troubleshooting Cloudflare 5XX errors | Cloudflare Support docs

I hope this helps. Please let us know if you still have questions.

Kindly,