[Samba] Samba idmap against ad

Stuart Bailey stuart at linusoft.co.uk
Wed Aug 11 05:27:41 MDT 2010

I have a samba server (old - running FC6, samba 3.0.24-11.fc6) that 
authenticates against AD. This is all configured and has been working fine 
until this week.

A new user has been added to AD, but cannot access the samba drives. All other 
users can still access samba as normal.

net ads testjoin reports OK. 

wbinfo -a newuser%pass and wbinfo -K newuser%pass both succeed. wbinfo -r 
newuser reports all the user group memberships from AD.

wbinfo -p is OK

wbinfo -i newuser reports that no information on that user can be found.

wbinfo -n newuser returns the SID, and wbinfo -s SID returns the username

However, wbinfo -S SID fails.

I found a thread that suggests a corrupted idmap cache file. If I delete this 
file, and restart winbind, the file is re-created, but contains no SID data.
I've also noticed that the winbindd_idmap.tdb file has an old time stamp 
winbindd_cache.tdb has today's date.

I tried setting:
   winbind cache time = 3600
   idmap cache time = 3600
but no improvement.

Also, this is affecting both FC6 servers we have, both with the same config. The 
config has not changed, and the servers have not been rebooted / power cycled 
etc. The problem only affects new AD user accounts.

Any sugguestions as to where I should look next?

Many thanks,

Stuart Bailey BSc (hons) CEng CITP MBCS
    LinuSoft (Managing Director)
 Linux Specialist & Software Developer
     Phone:   (0845) 658 3563
     Direct: +44 (0) 1953 878162
     Fax:    +44 (0) 1603 858583

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