What are the possible reasons for failed file-based validation?

Possible reasons for failed file validation include:

1. Incorrect file path

   • The validation file is not placed in the correct server root directory
   • The path should be: http://example.com/.well-known/pki-validation/文件名.txt

2. Incorrect file content

   • The file content does not match the validation content provided by the CA
   • The file content contains spaces or formatting errors

3. Port restrictions

   • Certificates of brands other than CFCA require the use of port 80 (http) or 443 (https)
   • If the ports are restricted, we recommend switching to CFCA brand certificates

4. Omission of multiple domain names

   • When a certificate covers multiple domain names, each domain name requires separate validation
   • Wildcard certificates do not support the file-based validation method

5. Server configuration issues

   • The server blocks access to the .well-known directory
   • Permissions for hidden directories are not set correctly

6. Server located overseas

   • If the validation server for the certificate you applied for is located overseas, you need to check for settings such as firewalls.

---

Recommended troubleshooting steps:

1. Confirm that the file path and content completely match the information provided by the CA
2. Verify that the file is accessible via the provided detection link
3. If the problem persists, you can try switching to a different validation method or contact technical support