My hosting provider has recently re-issued and re-installed an SSL certificate for my domain, after they let the old one expire by mistake.
I am now able to browse the website over HTTPS again, and so is my host, and so are a number of other users.
However, some users (at least a dozen out of hundreds) are still getting
Your connection is not secure error messages on different browsers and platforms. (It is proving difficult to diagnose an issue I cannot reproduce.)
I understand different browsers use different lists of Certification Authorities (CA.)
- How come a user running the same version of Firefox as I am (45.0.1 on OS X) is getting a
SEC_ERROR_UNKNOWN_ISSUERerror (for my site only) while I'm not? What makes it possible? Said user cleared his cache and rebooted his laptop.
I ran an SSL check on digicert.com. The result is this:
SSL Certificate is not trusted
The certificate is not signed by a trusted authority (checking against Mozilla's root store). If you bought the certificate from a trusted authority, you probably just need to install one or more Intermediate certificates. Contact your certificate provider for assistance doing this for your server platform.
- How come I am able to connect to the site without SSL error if this is the case?