Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

FireFox does not accept a newly updated {confirmed, valid} certificate (from a new authority) that other browsers accept.

  • 3 replies
  • 4 have this problem
  • 8 views
  • Last reply by cor-el

AnonymousUser
AnonymousUser
more options

When visitors attempt to access this URL, FireFox warns them that: "remote.edinburgh.gov.uk uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. (Error code: sec_error_unknown_issuer)"

The certificate comes from a different authority than we previously used, and is accepted as valid by IIS / Windows on the parent server, and by all versions of IE that we have tested.


URL of affected sites

https://remote.edinburgh.gov.uk

When visitors attempt to access this URL, FireFox warns them that: "remote.edinburgh.gov.uk uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. (Error code: sec_error_unknown_issuer)" The certificate comes from a different authority than we previously used, and is accepted as valid by IIS / Windows on the parent server, and by all versions of IE that we have tested. == URL of affected sites == https://remote.edinburgh.gov.uk

All Replies (3)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

The server doesn't send the TERENA SSL CA intermediate certificate. You can check that via http://www.networking4all.com/en/support/tools/site+check/

https://www.terena.org/activities/tcs/

AnonymousUser
AnonymousUser Question owner
more options

Thanks, I ended up having to use the DigiCertUtil.exe from https://www.digicert.com/util/ though I still don't know what was actually wrong. Would be really useful if FireFox would give a meaningful error message here - no indication of which of the parent certificates was the problem.

AnonymousUser
AnonymousUser Question owner
more options

https://remote.edinburgh.gov.uk still gives me the same error, as are several other websites since I upgraded to 3.6.4.