Hi,
On Thu, Jul 7, 2022 at 12:14 PM Fisher, Philip phil.fisher@dxc.com wrote:
Hi SSSD experts
I have tried examining various documentation and man pages but I am unable to determine the answer. Specifically, for security reasons, we require user on our Linux servers to login via AD credentials only (unless they are a specific local user). In particular, if the provider is offline/not available (in this case an AD server/servers) then login should fail.
Sounds like `cache_credentials = false`? (see `man sssd.conf`)
I thought it would be possible by setting various "cache" parameters but the documentation suggests that zero (0) is not a useful value.
So, can this be done? And if so, how? And if I missed some simple thing in the documentation a reply pointing me to said documentation would be acceptable :-).
Thanks. Phil
-- Phil J Fisher UNIX Technology Consultant
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On Thu, Jul 7, 2022 at 6:21 AM Alexey Tikhonov atikhono@redhat.com wrote:
On Thu, Jul 7, 2022 at 12:14 PM Fisher, Philip phil.fisher@dxc.com wrote:
In particular, if the provider is offline/not available (in this case an AD server/servers) then login should fail.
Sounds like `cache_credentials = false`? (see `man sssd.conf`)
Moreover, `cache_credentials = false` is the default, so unless this is overridden, attempts to login will fail if the AD KDCs are not available.
We can confirm that this is the case: we don’t override cache_credentials, and if something breaks network connectivity for a host, we can only login on the console with an account with a local password (e.g. root); attempting to login with an account that requires AD/Kerberos authentication fails.
Thank you both -- cannot believe I failed to see that option :-(. But at least you have cleared up the meaning as it was (IMO) slightly ambiguously phrased.
Phil
-- Phil J Fisher UNIX Technology Consultant
-----Original Message----- From: James Ralston ralston@pobox.com Sent: 07 July 2022 17:48 To: End-user discussions about the System Security Services Daemon sssd-users@lists.fedorahosted.org Subject: [SSSD-users] Re: Can SSSD be set up to disallow login if provider not available?
On Thu, Jul 7, 2022 at 6:21 AM Alexey Tikhonov atikhono@redhat.com wrote:
On Thu, Jul 7, 2022 at 12:14 PM Fisher, Philip phil.fisher@dxc.com wrote:
In particular, if the provider is offline/not available (in this case an AD server/servers) then login should fail.
Sounds like `cache_credentials = false`? (see `man sssd.conf`)
Moreover, `cache_credentials = false` is the default, so unless this is overridden, attempts to login will fail if the AD KDCs are not available.
We can confirm that this is the case: we don’t override cache_credentials, and if something breaks network connectivity for a host, we can only login on the console with an account with a local password (e.g. root); attempting to login with an account that requires AD/Kerberos authentication fails. _______________________________________________ sssd-users mailing list -- sssd-users@lists.fedorahosted.org To unsubscribe send an email to sssd-users-leave@lists.fedorahosted.org Fedora Code of Conduct: https://clicktime.symantec.com/15tStaBhiiVCz9My4UY59?h=r3BovLSJswnnSQUawdVjK... List Guidelines: https://clicktime.symantec.com/15tSyQNzBLAoQ6Btc2wDm?h=IvpQ1w1Ios0MOtSIvQkuM... List Archives: https://clicktime.symantec.com/15tT4EaGdwrPp31p9bLNP?h=xlEJW-wKLhTMqs3PF3R0d... Do not reply to spam on the list, report it: https://clicktime.symantec.com/15tT94mZ6ZXzDyqjh9jX1?h=29AasCzmx5bNbB9jMd4v8...
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sssd-users@lists.fedorahosted.org
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Alexey Tikhonov -
Fisher, Philip -
James Ralston