We found out it has to do with GPO.  With
ad_gpo_access_control = enforcing

we get failures (system error 4 with no indication in the logs it was GPO in 
any way).

ad_gpo_access_control = permissive

and all is well.  I’ll open a ticket with Canonical.



From: Andreas Hasenack [mailto:[email protected]]
Sent: Monday, December 18, 2017 2:48 PM
To: End-user discussions about the System Security Services Daemon 
<[email protected]>
Subject: [SSSD-users] Re: Ubuntu Xenial failures


EXTERNAL MAIL: 
[email protected]<mailto:[email protected]>
You should file a bug in Ubuntu, specially if downgrading to the previous 
package fixes the problem for you.

On Dec 18, 2017 18:10, "Jay McCanta" 
<[email protected]<mailto:[email protected]>> wrote:
After an update to Ubuntu Xenial, sssd_pam always fails with a system error(4) 
error.

Dec 18 20:07:22 sv5cismfgcr01 sshd[27263]: pam_sss(sshd:auth): authentication 
success; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.168.11.129 user=mccanta
Dec 18 20:07:22 sv5cismfgcr01 sshd[27263]: pam_sss(sshd:account): Access denied 
for user mccanta: 4 (System error)

I have debug_level 10 logs I can send.  Didn't want to post thos to the mailing 
list.

Jay

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