Kerberos authentication working for Chrome, Edge, Opera, and Brave, but not Firefox
Firefox (129.0.2) displays "401 - Unauthorized: Access is denied due to invalid credentials" (see attached image)
I have tried various combinations of setting and not setting the following in Firefox:
- network.negotiate-auth.trusted-uris
- network.negotiate-auth.delegation-uris
- network.auth.use-sspi
For the URI settings I have tried both .domainname.domainextension and https://servicename.domainname.domainextension
In Windows 10 Control Panel -> Internet Options, the site is in "Trusted sites" using a domain wildcard, and also "Local intranet" and both "Automatic logon" and "Enable Integrated Windows Authentication" are enabled. I suspect those setting aren't relevant since other browsers are authenticating without error or prompt, but calling this out to show that I've covered that base.
The web service is served by IIS 10.0 on Windows Server 2022 and the authentication provider list only includes Negotiate, but I don't believe this issue has anything to do with IIS or its configuration as, again, other browsers are authenticating without error or prompt.
Anything else to check?
Thank you for any guidance you can offer.
Modified by bryan
All Replies (3)
Here's some documentation on this:
that hopefully helps.
If that doesn't work, let me know. Might be easiest to open a bugzilla bug and get developers involved.
Mike Kaply said
Here's some documentation on this: https://htmlpreview.github.io/?https://github.com/mdn/archived-content/blob/main/files/en-us/mozilla/integrated_authentication/raw.html that hopefully helps. If that doesn't work, let me know. Might be easiest to open a bugzilla bug and get developers involved.
unfortunately there wasn't any guidance in there that hasn't already been followed from other sources
I'm at a loss.
I think you might get some better help on this from our enterprise list.
https://groups.google.com/a/mozilla.org/g/enterprise
Most of the folks there are deploying Firefox an dealing with this stuff on a day to day basis.
If you don't get any responses there, we can open a bugzilla bug and see if we can get the networking team to take a look.
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