Cannot add security exceptions

I use firefox 32.0.1 on Windows 7 and have a lot of trouble with https - I can not add security exceptions. Problem occurred on an earlier version of firefox as well (finally ask your question to the support from the community after a few months with this problem).

When I visit a problematic site (including several managed by Duke University), I get a message "this connection is untrusted". I click on "I understand the risks", "add exception". But I can't get a certificate or confirm a security exception.

I searched the Forum but have not found a similar problem or solution yet. I have the latest version of firefox and I tried to disable all add-ons.

I've been transitioning to Chrome because these problems started to occur, but I would go back to Firefox. Any thoughts?

The certificate chain shows the intermediate certificate server CA of Internet2 InCommon in your blocked examples

intermediate certificate: InCommon Server CA -> AddTrust External CA Root

You can check the Certificate Manager to see if you can locate the certificate under AddTrust AB and remove it.

Check the date and time and time zone in clock of your computer: (double) click on the clock icon in the Windows taskbar.

Rename the file cert8.db (cert8.db.old) and remove the cert_override.txt file in the Firefox profile folder to remove certificates intermediaries and exceptions that Firefox has stored.

So that has helped solve the problem, you can then delete the renamed file cert8.db.old.
Otherwise you can rename (or copy) the file cert8.db.old to cert8.db to restore intermediary certificates already in memory.
Firefox automatically records the intermediate certificates when you visit Web sites that send such a certificate.

If that didn't help then remove or rename secmod.db (secmod.db.old) as well.

Tags: Firefox

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