Hi borisrgey,
If your website works well when accessed via "buon.hu" but not via "www.buon.hu", and browsers are flagging the latter as insecure, it's likely due to a misconfiguration of SSL certificates or DNS settings. Here's what you can do to troubleshoot and fix this issue:
Check SSL Certificate Configuration:
Ensure that your SSL certificate is correctly configured to cover both "demo.com" and "www.demo.com". Some SSL certificates are issued only for one version (with or without 'www'), so you might need to get a certificate that covers both.
Check your SSL certificate provider's documentation or dashboard to see if there are any issues or if you need to make adjustments.
DNS Configuration:
Make sure your DNS records (A and CNAME) are correctly configured for both "demo.com" and "www.demo.com" to point to the correct server IP address.
Ensure that any DNS settings related to SSL certificates (such as CAA records) are properly configured to allow SSL certificates for both versions.
Consult with Hosting Provider or IT Support:
If you're unsure about any of the configurations or settings, reach out to your hosting provider or IT support team for assistance. They can often help diagnose and resolve these types of issues.