samba - Aug 2017 - explorer.exe: no mapping between names and security ids was done

... I just want to put this somewhere easily searchable based on the users error
message.

Upgrading a domain controller to Debian 8  (samba 3 to 4) resulted in the
message "no mapping between names and security
ids was done" at times. The message appears on the windows 7 domain pcs
when running explorer.exe. Also other basic
things did not work: internet explorer, or mapping between file types and
extensions.  But only at times.

The problem is apparent when running set in a command on the affected windows
pc. Look for the USERDOMAIN variable
somewhere at the bottom of the list. It is not set to the real domain name. In
my case it was the name of the server
before it became a domain controller. I suspect the system was hanging together
due to netbios names - eek. Mostly and
for years running Debian 7, and samba 3 this was accidentally reliable.

A quick fix is possible on the samba domain controller:

sudo pdbedt -I "MYDOMAIN" -u username

.. the next login should return things to normal for the user.

 From the pdbedit manpage:

        -I|--domain
            This option can be used while adding or modifying a user account. It
will specify the user's domain field.

            Example: -I "MYDOMAIN"

Hope this helps someone

Bernie

Ref: This hint - https://lists.samba.org/archive/samba/2005-December/115411.html
from way back

On Thu, 3 Aug 2017 09:59:44 +0100
Bernie Elbourn via samba <samba at lists.samba.org> wrote:
> ... I just want to put this somewhere easily searchable based on the
> users error message.
> 
> Upgrading a domain controller to Debian 8  (samba 3 to 4) resulted in
> the message "no mapping between names and security ids was done"
at
> times. The message appears on the windows 7 domain pcs when running
> explorer.exe. Also other basic things did not work: internet
> explorer, or mapping between file types and extensions.  But only at
> times.
> 
> The problem is apparent when running set in a command on the affected
> windows pc. Look for the USERDOMAIN variable somewhere at the bottom
> of the list. It is not set to the real domain name. In my case it was
> the name of the server before it became a domain controller. I
> suspect the system was hanging together due to netbios names - eek.
> Mostly and for years running Debian 7, and samba 3 this was
> accidentally reliable.
> 
> A quick fix is possible on the samba domain controller:
> 
Yes, but is this an NT4-style PDC or an AD DC ?

It is probably a PDC, if so, can I suggest that as you have upgraded the
OS, it might be a good idea to think about moving to Active Directory.

Rowland

Howdy Rowland,

On 03/08/17 10:51, Rowland Penny via samba wrote:
> On Thu, 3 Aug 2017 09:59:44 +0100
> Bernie Elbourn via samba <samba at lists.samba.org> wrote:
>
>> ... I just want to put this somewhere easily searchable based on the
>> users error message.
>>
>> Upgrading a domain controller to Debian 8  (samba 3 to 4) resulted in
>> the message "no mapping between names and security ids was
done" at
>> times. The message appears on the windows 7 domain pcs when running
>> explorer.exe. Also other basic things did not work: internet
>> explorer, or mapping between file types and extensions.  But only at
>> times.
>>
>> The problem is apparent when running set in a command on the affected
>> windows pc. Look for the USERDOMAIN variable somewhere at the bottom
>> of the list. It is not set to the real domain name. In my case it was
>> the name of the server before it became a domain controller. I
>> suspect the system was hanging together due to netbios names - eek.
>> Mostly and for years running Debian 7, and samba 3 this was
>> accidentally reliable.
>>
>> A quick fix is possible on the samba domain controller:
>>
> Yes, but is this an NT4-style PDC or an AD DC ?
>
> It is probably a PDC, if so, can I suggest that as you have upgraded the
> OS, it might be a good idea to think about moving to Active Directory.
>
> Rowland
>
Your guess is right. It is a smb.conf security = user flavour domain ... with
all the inherent historical configuration
ouchies.

Ad is indeed possible but so far not needed.

Bernie