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Rowland Penny

2015-Apr-03 12:42 UTC

[Samba] Member server - winbind unable to resolve users/groups

On 03/04/15 13:05, Andrey Repin wrote:> Greetings, Ashish Yadav!
>
>>>> I'm trying to get the former PDC back into domain after
performing a
>>> classic
>>>> migration.
>>>> AD DC is running fine... if you can call it that.
>>>> I've edited the smb.conf and nsswitch.conf as suggested in
Wiki article,
>>> and
>>>> rejoined the domain. Went fine apart from failed DNS update
with local
>>> zone.
>>>
>>>> # net ads testjoin
>>>> Join is OK
>>>> But there's no data in getent, and domain users are unable
to
>>> authenticate on
>>>> the server.
>>>> So, where do I start looking?
>> Please check your  /etc/nsswitch.conf file, it should look contains
this,
>> passwd: compat winbind
>> group:    compat winbind
>> For more information, please go through Samba Wiki first,
>> https://wiki.samba.org/index.php/Setup_a_Samba_AD_Member_Server
> Please read the message - I explicitly stated that nsswitch.conf is amended
as
> suggested on the wiki.
>
>
OK, so you upgraded an NT-4 style PDC to AD with 'samba-tool domain 
classicupgrade', this should have given you users with uidNumber 
attributes and groups with gidNumber attributes.

If,as you said, you used the smb.conf from the member server wiki page, 
you will have something like this in your smb.conf:

    idmap config *:backend = tdb
    idmap config *:range = 2000-9999
    idmap config SAMDOM:backend = ad
    idmap config SAMDOM:schema_mode = rfc2307
    idmap config SAMDOM:range = 10000-99999

Two questions:
Did you change 'SAMDOM' to your workgroup name ?
Are your users & groups uidNumber & gidNumber attributes inside the 
'10000=99999' range ?

Rowland

Andrey Repin

2015-Apr-03 18:33 UTC

head link

[Samba] Member server - winbind unable to resolve users/groups

Greetings, Rowland Penny!
>>>>> I'm trying to get the former PDC back into domain after
performing a
>>>> classic
>>>>> migration.
>>>>> AD DC is running fine... if you can call it that.
>>>>> I've edited the smb.conf and nsswitch.conf as suggested
in Wiki article,
>>>> and
>>>>> rejoined the domain. Went fine apart from failed DNS update
with local
>>>> zone.
>>>>
>>>>> # net ads testjoin
>>>>> Join is OK
>>>>> But there's no data in getent, and domain users are
unable to
>>>> authenticate on
>>>>> the server.
>>>>> So, where do I start looking?
>>> Please check your  /etc/nsswitch.conf file, it should look contains
this,
>>> passwd: compat winbind
>>> group:    compat winbind
>>> For more information, please go through Samba Wiki first,
>>> https://wiki.samba.org/index.php/Setup_a_Samba_AD_Member_Server
>> Please read the message - I explicitly stated that nsswitch.conf is
amended as
>> suggested on the wiki.
>>
>>
> OK, so you upgraded an NT-4 style PDC to AD with 'samba-tool domain 
> classicupgrade', this should have given you users with uidNumber 
> attributes and groups with gidNumber attributes.
> If,as you said, you used the smb.conf from the member server wiki page, 
> you will have something like this in your smb.conf:
>     idmap config *:backend = tdb
>     idmap config *:range = 2000-9999
>     idmap config SAMDOM:backend = ad
>     idmap config SAMDOM:schema_mode = rfc2307
>     idmap config SAMDOM:range = 10000-99999
> Two questions:
> Did you change 'SAMDOM' to your workgroup name ?
> Are your users & groups uidNumber & gidNumber attributes inside the
> '10000=99999' range ?
It was a little more complicated process, than that.

Host: Ubuntu 12.04 running Samba 3.6.3->4.1.11 and LXC 1.0.7 stable.

On host, I've set up container DC1, copied over the 3.6.3 TDB's from
host and
performed classicupgrade with hostname change. After initial failure and a
month of head cracking, it somehow worked out on April 1st.

The container runs as it could, resolving uids to domain names within itself,
at least.

Now, I need to get the same resolution on the host.
The Samba 3 configuration files were moved away on the host before Samba
upgrade, so that I could have one more backup copy of the configuration, if
things go wrong.

After upgrading Samba, I've edited {smb,nsswitch}.conf as outlined on the
Wiki, and then commanded to join the AD.
Join went fine except for a notice "unable to update DNS record for
userl.ccenter.lan".
After that, I removed startup blocks on smbd/nmbd/winbind and rebooted
everything.

Currently, the situation is as follows:

DC1 (AD DC): http://pastebin.com/WncfgLb6

root at dc1:~# smbclient -L dc1 -U domainuser
Enter domainuser's password:
Domain=[CCENTER] OS=[Unix] Server=[Samba 4.1.11-Ubuntu]

        Sharename       Type      Comment
        ---------       ----      -------
        netlogon        Disk
        sysvol          Disk
        IPC$            IPC       IPC Service (Samba 4.1.11-Ubuntu)
Domain=[CCENTER] OS=[Unix] Server=[Samba 4.1.11-Ubuntu]

        Server               Comment
        ---------            -------

        Workgroup            Master
        ---------            -------

root at dc1:~# smbclient -L userl -U domainuser
Enter domainuser's password:
session setup failed: NT_STATUS_LOGON_FAILURE

USERL (member server): http://pastebin.com/25Lx6z9v

root at userl:~# net ads testjoin
Join is OK

root at userl:~# smbclient -L dc1 -U domainuser
Enter domainuser's password:
Domain=[CCENTER] OS=[Unix] Server=[Samba 4.1.11-Ubuntu]

        Sharename       Type      Comment
        ---------       ----      -------
        netlogon        Disk
        sysvol          Disk
        IPC$            IPC       IPC Service (Samba 4.1.11-Ubuntu)
Domain=[CCENTER] OS=[Unix] Server=[Samba 4.1.11-Ubuntu]

        Server               Comment
        ---------            -------

        Workgroup            Master
        ---------            -------

root at userl:~# smbclient -L userl -U domainuser
Enter domainuser's password:
session setup failed: NT_STATUS_LOGON_FAILURE

Looking at winbind/idmap logs,

[2015/04/03 21:16:17.636654, 10, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_cache.c:4446(pack_tdc_domains)
  pack_tdc_domains: Packing domain CCENTER (ADS.CCENTER.LAN)
[2015/04/03 21:16:17.636687, 10, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_util.c:230(add_trusted_domain)
  idmap config CCENTER : range = 1000-50000
[2015/04/03 21:16:17.636720,  2, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_util.c:255(add_trusted_domain)
  Added domain CCENTER ADS.CCENTER.LAN S-1-5-21-1031481445-3291699540-3997755762
[2015/04/03 21:16:17.636766, 10, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_cm.c:561(set_domain_online_request)
  set_domain_online_request: called for domain CCENTER
[2015/04/03 21:16:17.636803, 10, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_cm.c:596(set_domain_online_request)
  set_domain_online_request: domain CCENTER was globally offline.

Eh? What the? Why? Google says it may be an issue with DNS, but mine works
fine. Especially since a few lines before it successfully contact AD DC.


-- 
With best regards,
Andrey Repin
Friday, April 3, 2015 16:06:14

Sorry for my terrible english...

Luca Olivetti

2015-Apr-03 18:58 UTC

head link

[Samba] Member server - winbind unable to resolve users/groups

El 03/04/15 a les 20:33, Andrey Repin ha escrit:
> Eh? What the? Why? Google says it may be an issue with DNS, but mine works
> fine. Especially since a few lines before it successfully contact AD DC.
Probably not related, but I had an issue with kerberos and it turns out
I had the wrong host name for 127.0.0.1 in /etc/hosts

Bye
-- 
Luca Olivetti
Wetron Automation Technology http://www.wetron.es
Tel. +34 935883004  Fax +34 935883007

Rowland Penny

2015-Apr-03 19:15 UTC

head link

[Samba] Member server - winbind unable to resolve users/groups

On 03/04/15 19:33, Andrey Repin wrote:> Greetings, Rowland Penny!
>
>>>>>> I'm trying to get the former PDC back into domain
after performing a
>>>>> classic
>>>>>> migration.
>>>>>> AD DC is running fine... if you can call it that.
>>>>>> I've edited the smb.conf and nsswitch.conf as
suggested in Wiki article,
>>>>> and
>>>>>> rejoined the domain. Went fine apart from failed DNS
update with local
>>>>> zone.
>>>>>
>>>>>> # net ads testjoin
>>>>>> Join is OK
>>>>>> But there's no data in getent, and domain users are
unable to
>>>>> authenticate on
>>>>>> the server.
>>>>>> So, where do I start looking?
>>>> Please check your  /etc/nsswitch.conf file, it should look
contains this,
>>>> passwd: compat winbind
>>>> group:    compat winbind
>>>> For more information, please go through Samba Wiki first,
>>>> https://wiki.samba.org/index.php/Setup_a_Samba_AD_Member_Server
>>> Please read the message - I explicitly stated that nsswitch.conf is
amended as
>>> suggested on the wiki.
>>>
>>>
>> OK, so you upgraded an NT-4 style PDC to AD with 'samba-tool domain
>> classicupgrade', this should have given you users with uidNumber
>> attributes and groups with gidNumber attributes.
>> If,as you said, you used the smb.conf from the member server wiki page,
>> you will have something like this in your smb.conf:
>>      idmap config *:backend = tdb
>>      idmap config *:range = 2000-9999
>>      idmap config SAMDOM:backend = ad
>>      idmap config SAMDOM:schema_mode = rfc2307
>>      idmap config SAMDOM:range = 10000-99999
>> Two questions:
>> Did you change 'SAMDOM' to your workgroup name ?
>> Are your users & groups uidNumber & gidNumber attributes inside
the
>> '10000=99999' range ?
> It was a little more complicated process, than that.
>
> Host: Ubuntu 12.04 running Samba 3.6.3->4.1.11 and LXC 1.0.7 stable.
>
> On host, I've set up container DC1, copied over the 3.6.3 TDB's
from host and
> performed classicupgrade with hostname change. After initial failure and a
> month of head cracking, it somehow worked out on April 1st.
>
> The container runs as it could, resolving uids to domain names within
itself,
> at least.
>
> Now, I need to get the same resolution on the host.
> The Samba 3 configuration files were moved away on the host before Samba
> upgrade, so that I could have one more backup copy of the configuration, if
> things go wrong.
>
> After upgrading Samba, I've edited {smb,nsswitch}.conf as outlined on
the
> Wiki, and then commanded to join the AD.
> Join went fine except for a notice "unable to update DNS record for
> userl.ccenter.lan".
> After that, I removed startup blocks on smbd/nmbd/winbind and rebooted
> everything.
>
> Currently, the situation is as follows:
>
> DC1 (AD DC): http://pastebin.com/WncfgLb6
>
> root at dc1:~# smbclient -L dc1 -U domainuser
> Enter domainuser's password:
> Domain=[CCENTER] OS=[Unix] Server=[Samba 4.1.11-Ubuntu]
>
>          Sharename       Type      Comment
>          ---------       ----      -------
>          netlogon        Disk
>          sysvol          Disk
>          IPC$            IPC       IPC Service (Samba 4.1.11-Ubuntu)
> Domain=[CCENTER] OS=[Unix] Server=[Samba 4.1.11-Ubuntu]
>
>          Server               Comment
>          ---------            -------
>
>          Workgroup            Master
>          ---------            -------
>
> root at dc1:~# smbclient -L userl -U domainuser
> Enter domainuser's password:
> session setup failed: NT_STATUS_LOGON_FAILURE
>
> USERL (member server): http://pastebin.com/25Lx6z9v
>
> root at userl:~# net ads testjoin
> Join is OK
>
> root at userl:~# smbclient -L dc1 -U domainuser
> Enter domainuser's password:
> Domain=[CCENTER] OS=[Unix] Server=[Samba 4.1.11-Ubuntu]
>
>          Sharename       Type      Comment
>          ---------       ----      -------
>          netlogon        Disk
>          sysvol          Disk
>          IPC$            IPC       IPC Service (Samba 4.1.11-Ubuntu)
> Domain=[CCENTER] OS=[Unix] Server=[Samba 4.1.11-Ubuntu]
>
>          Server               Comment
>          ---------            -------
>
>          Workgroup            Master
>          ---------            -------
>
> root at userl:~# smbclient -L userl -U domainuser
> Enter domainuser's password:
> session setup failed: NT_STATUS_LOGON_FAILURE
>
> Looking at winbind/idmap logs,
>
> [2015/04/03 21:16:17.636654, 10, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_cache.c:4446(pack_tdc_domains)
>    pack_tdc_domains: Packing domain CCENTER (ADS.CCENTER.LAN)
> [2015/04/03 21:16:17.636687, 10, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_util.c:230(add_trusted_domain)
>    idmap config CCENTER : range = 1000-50000
> [2015/04/03 21:16:17.636720,  2, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_util.c:255(add_trusted_domain)
>    Added domain CCENTER ADS.CCENTER.LAN
S-1-5-21-1031481445-3291699540-3997755762
> [2015/04/03 21:16:17.636766, 10, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_cm.c:561(set_domain_online_request)
>    set_domain_online_request: called for domain CCENTER
> [2015/04/03 21:16:17.636803, 10, pid=8618, effective(0, 0), real(0, 0),
class=winbind] ../source3/winbindd/winbindd_cm.c:596(set_domain_online_request)
>    set_domain_online_request: domain CCENTER was globally offline.
>
> Eh? What the? Why? Google says it may be an issue with DNS, but mine works
> fine. Especially since a few lines before it successfully contact AD DC.
>
>
I am struggling to understand this setup, you have created a samba AD DC 
running on Ubuntu 12.04 inside a container (docker  ??), you then seem 
to have altered the AD DCs smb.conf for some reason, can I ask why ?

You then setup a member server, joined it to the domain, but now cannot 
connect to the member server from the DC via smbclient, is this correct ?

what have you got in:

/etc/resolv.conf
/etc/krb5.conf

This on both machines

can you ping from each machine to the other, both by ip and hostname ?

what does 'host -t SRV _ldap._tcp.ads.ccenter.lan.' show ?

does the 'container' have all the required ports open ?

Rowland

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