Why Do I Get “Common Name Mismatch” Error in My Browser?

This error happens when the domain name in the SSL certificate (Common Name) doesn’t match the domain you are visiting.

Common causes include:

• Visiting www.yourdomain.com but the certificate is issued for yourdomain.com only (or vice versa).
• Using an IP address instead of a domain name.
• Certificate issued for a different domain.

To fix this:

• Ensure your certificate covers all variants of your domain (consider a wildcard or SAN certificate).
• Use the correct domain URL in the browser.
• Contact Aviumshost support for assistance if unsure.