[Samba] Security: ads - "net ads user" works, "wbinfo -u" does not

Vladimir Levijev vladimir.levijev at gmail.com
Tue Feb 5 16:24:05 MST 2013

On 4 February 2013 21:38, Vladimir Levijev <vladimir.levijev at gmail.com> wrote:

> I have Debian Squeeze running Samba being a member of the domain (PDC
> and BDC are Windows servers) and it's users are authenticated against
> AD using winbind for years.
> Now there is a need to setup another virtual Debian box exactly like
> that. So the name of the first is STUDENT, I named the virtual
> STUDENT2. I'm trying to set up the virtual box exactly the same, using
> exactly the same configs (smb.conf, krb5.conf) as on the working box,
> but this is what I get:
> STUDENT2, I can:
> - create kerberos tickets (kinit Administrator at FOO.LOCAL)
> - list kerberos tickets (klist)
> - join the domain (net ads join -U Administrator)
>   Here I get next output:
>     Using short domain name -- FOO
>     Joined 'STUDENT2' to realm 'FOO.Local'
>     DNS update failed!
>   But as I understand the last message is not something to worry about.
> - (here I start samba, then winbind)
> And at this point strange thing happen. I cannot get domain users
> using wbinfo (wbinfo -u returns nothing) but I get them all using "net
> ads user -U Administrator". Of course, "getent passwd" lists only
> local users too.
> I believe my winbind is not working properly. Here are the questions:
> 1). How to effectively debug why wbinfo is acting this way?
> 2). Could the problem be because of 2 machines conflicting because of
> one letter difference (STUDENT vs STUDENT2)?
> I can't delete the first box from domain in order to test it as it's
> in production.
> STUDENT2 details:
> - Debian Squeeze up-to-date (6.0.6)
> - standard repo packages: # dpkg -l '*samba*' '*winbind*' | grep ^ii
>   ii  samba                              2:3.5.6~dfsg-3squeeze9
>   ii  samba-common                       2:3.5.6~dfsg-3squeeze9
>   ii  samba-common-bin                   2:3.5.6~dfsg-3squeeze9
>   ii  winbind                            2:3.5.6~dfsg-3squeeze9
> - # wbinfo -p
> Ping to winbindd succeeded
> PDC and BDCs are running Windows Server 2008 R2.
> I can post the configs in case it helps. However I feel like I have
> tried all the possible variations of the configs (from so many good
> howto's) with no effect at all.

More info.

# wbinfo -D foo
Name              : FOO
Alt_Name          : FOO.Local
SID               : S-1-5-21-831812219-1424057545-2139100090
Active Directory  : Yes
Native            : Yes
Primary           : Yes

# wbinfo -D foo
Name              : FOO
Alt_Name          : FOO.LOCAL
SID               : S-1-5-21-831812219-1424057545-2139100090
Active Directory  : No
Native            : No
Primary           : Yes

Firstly, why is Alt_Name different (both boxes have identical configs)
and where does it come from exactly?
And secondly, what do "Active Directory", "Native" and "Primary" mean?



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