What is the name of the domain?
myreliablesourcing .top/.cn/.com
What is the error number?
What is the error message?
Web server is down Error code 521 Visit cloudflare.com for more information. 2024-07-28 14:01:56 UTC
What is the issue you’re encountering
When I use Cloudflare to resolve the domain to my server’s public IP, I find that the IP address is incorrect when checking with nslookup, and I receive error code 521 when accessing the domain.
What steps have you taken to resolve the issue?
I am using Alibaba’s server and have opened ports 443 and 80. I am using Cloudflare’s DNS servers and have pointed the domain to my public IP address under Alibaba. My China-based cPanel is also working fine, and the domain has passed government real-name verification. However, when accessing the website, it shows error code 521.
What feature, service or problem is this related to?
DNS not responding/updating
What are the steps to reproduce the issue?
1Check the Cloudflare DNS information; it has been verified as correct in the Alibaba backend.
2Verify the domain resolution address, which was copied from the Alibaba backend and is also correct.
3Configure Alibaba Cloud’s firewall to open ports 443 and 80, and cPanel is accessible.
4When using nslookup to check the domain, the resolved IP address is not my own. Alibaba staff mentioned that if cPanel is accessible, it indicates that their servers are functioning properly.