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Re: [Samba] Developed an issue with Samba File Server integrated with Samba-AD

Hello Rowland,
On Sat, 30 Jun 2018 14:51:48 +0530
Anantha Raghava via samba <samba@xxxxxxxxxxxxxxx> wrote:


We have been using Samba File Server (Version 4.3.11 Ubuntu 14.04
LTS) for quite sometime now. We recently installed Samba-AD (Samba
AD Version 4.7.6) and made the file server a member of the Domain.
Everything was fine till around 11:15 am yesterday. We just added
one more share folder and gave access to three users and restarted
Samba File Server services
- smbd, nmbd and winbindd - services and we lost the file server.
None of the domain user is able to login to file server and access
their shares. If we access the shares from a non-domain member PC,
shares are accessible.

File server when accessed asks for user name & password. Once the
user feeds his credentials, the login fails and again the file
server will ask for user credentials. This is really surprising.

We enabled log level 3 on both samba servers (File & AD Server) and
we see nothing with respect to this error.

Our smb.conf (samba file server) and Samba-AD (AD-smb.conf) are

I am aware that Samba file server is very old and it's time to
upgrade. However, getting it back live is now critical for us.

Look forward for any guidance.

Thanks & Regards,

Anantha Raghava

Do not print this e-mail unless required. Save Paper & trees.

There doesn't seen to be anything really wrong with the Unix domain
member smb.conf, apart from it having a netlogon share (this in my
opinion should only be on a PDC or DC). I would leave the domain,
remove the netlogon share, remove all Samba .ldb and .tdb files
(usually in /var/lib/samba), then rejoin the domain and restart the
samba deamons (nmbd, smbd and winbindd), this will recreate all the
Samba databases.

If this doesn't work, add 'log level = 10' to smb.conf on the Unix
domain member and see if anything pops out.

I have however noticed this:

DC smb.conf:

       realm = XXXX.COM
    workgroup = XXXX

    path = /usr/local/samba/var/locks/sysvol/exza.com/scripts

Unix domain member smb.conf:

      workgroup = CSAEROTHERM
      realm = CSAEROTHERM.COM

On the DC, the realm appears to actually be 'exza.com' but on the
Unix domain member it is set to 'CSAEROTHERM.COM', these must
match, yours don't.
This is matching. I was just comparing the smb.conf of AD DC on
exza.com server with that of CSAEROTHERM.COM. Since it was same, I
just copied smb.conf from exza.com server and attached to the mail.

I tried the your suggestion. I attempted to leave domain. it resulted

root@samba-64:/var/lib/samba# net ads leave -U administrator
No realm set, are we joined ?

& If I try to join the domain, it results in :

root@samba-64:/var/lib/samba# net ads join -U administrator
Host is not configured as a member server.
Invalid configuration.  Exiting....
Failed to join domain: This operation is only allowed for the PDC of
the domain.



Anantha Raghava
I ran your smb.conf through testparm and it found something I missed,
you do not have a [global] section ;-)
You have a [gdlobal] section !

Thanks a TON Rowland...It's back to normal. Just can't imagine how this small spelling mistake all of our eyes!!! We were all set to install a new server and move terabytes of data from this failed server to new one.

We can now peacefully setup a new server with with new samba version and move data with minimum disruption to regular work.

Again Thanks a TON..


Anantha Raghava

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