[Samba] Winbind / Samba auth problem after username change

[Julian Zielke]

Hi Mathias,

thanks for your advice on how to use getent. However you’re mentioning SSSD which is working fine. I was referring to it because we changed to that method lately but the server having the problem is NOT using this new method but the old winbind+samba combination.

Sorry it it was confusing.

Cheers,
Julian

Von: mathias dufresne [mailto:infractory at gmail.com]
Gesendet: Dienstag, 6. September 2016 10:44
An: Julian Zielke <jzielke at next-level-integration.com<mailto:jzielke at next-level-integration.com>>
Cc: samba at lists.samba.org<mailto:samba at lists.samba.org>
Betreff: Re: [Samba] Winbind / Samba auth problem after username change

Hi,
You had a working environment using Winbind to retrieve user from AD.
You had to change that and now you have replaced Winbind by SSSD.
You changed some user names, those can't login any more.
When using "getent passwd | grep <username>" you have response.
A small note: rather than "getent passwd | grep <username>" which is resource consuming you can do "getent passwd <username>". You ask here for one user only which needs less resources, you should have one line as a response.
For me your configuration is almost good, at least for the part which is responsible to retrieve users from the domain.
It seems you are lacking some configuration to tell SSSD which group can login (because of "not allowed because none of user's groups are listed in AllowGroups").
Add some groups in "AllowGroups" or don't use that feature. That should let your users log in.
Cheers,
M.

2016-09-06 10:17 GMT+02:00 Julian Zielke via samba <samba at lists.samba.org<mailto:samba at lists.samba.org>>:
Hi,

before we switched to SSSD we've been implementing the ssh authentication method via Domain using winbind+samba.
Version installed on our machines is (still) 2:4.1.6+dfsg-1ubuntu2.14.04.13. So far everything has been working fine, however
after we had to change a user's logon name in the domain he can't login anymore. auth.log shows still his old username followed by "from <IP> not allowed because none of user's groups are listed in AllowGroups". I searched several websites for a solution but only found recommendations on deleting
the winbind cache at /var/lib/samba. However this didn't fix the problem. When I do a grep using getent passwd on the users NEW name, it shows up.
So actually the domain controllers is delivering the correct username.

Is this a known bug in version 4.1.6 or can I solve this any other way without running a package upgrade on a production machine?

Cheers
Julian

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