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Old 02-17-2003, 06:21 AM   #1
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Registered: Feb 2003
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Question some domain users can not own local files

Hello everyone,

i have set up PC with Redhat Linux 8.0 as a client in a pure windows domain. My goal was to use domain authentification instead of local accounts for remote logins via Cygwin. This works for *some* domain users, but unfortunately not for all.

The PC in question has joined the domain. Samba is set to security=domain and winbind is configured that i can see all domain user's SIDs and GIDs. On a try to login local at the PC as a domain user (as 'DOMAIN\user2'), /var/log/messages shows, that winbind-authentification works. But rejects *some* of the the domain users:
Feb 13 12:58:58 localhost pam_winbind[3239]: user 'DOMAIN\user2'
granted acces
Feb 13 12:58:58 localhost login(pam_unix)[3239]: could not identify user (from getpwnam(DOMAIN\user2))
Feb 13 12:58:58 localhost login[3239]: User not known to the underlying authentication module
Additional, i have recognized, that i cannot change file ownership to these users:
[root@localhost home]# chown -Rc DOMAIN\\user2 testdir
chown: `DOMAIN\\user2': invalid user
These users _do_ exist and i have tried upper and lower case. All of the user's names in this domain start with the same character, an 'e'.
Any ideas, what can cause this behavior?

For other users and groups changing ownership works as it should:
[root@localhost home]# chown -Rc DOMAIN\\user1 testdir
changed ownership of `testdir' to DOMAIN\\user1
[root@localhost home]# chown -Rc :DOMAIN\\not_existing_group_name testdir
chown: `:DOMAIN\\not_existing_group_name': invalid group
[root@localhost home]# chown -Rc :DOMAIN\\EXISTING_Group testdir
changed ownership of `testdir' to :DOMAIN\EXISTING_Group
any suggestions and ideas are appreciated

Robert Foehlinger /confused
Old 02-18-2003, 07:56 AM   #2
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Registered: Feb 2003
Posts: 2

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problem solved

Got it!
strace showed me, that some domain user's UIDs have been wihin the range of my samba user id settings for remote access users. The system has not been able to map users whose domain UIDs have been within that range.

In /etc/smb.config I changed the line
winbind uid=10000-20000
winbind uid=63000-64000

Now also a domain user with id 14233 is able to own a file and to log in.

thanks for your efforts

Robert Foehlinger


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