[Samba] Problem with Winbind and Windows Clients

Tue Mar 22 11:10:05 UTC 2016

Only thing i can think of now is enable higher log levels in the problem member server so we can have a better look in to the problem. 
im out of options, you config looks good, and dont think its the vlanning. 

Add in smb.conf something like : 

log level = 3 passdb:5 auth:10 winbind:10

and wait again untill the problem exists. 

You may need to increase the max log size. 

Rowland, you any suggestions? 

Greetz, 

Louis

Van: Oliver Werner [mailto:oliver.werner at kontrast.de] 
Verzonden: dinsdag 22 maart 2016 11:24
Aan: L.P.H. van Belle
CC: samba at lists.samba.org
Onderwerp: Re: [Samba] Problem with Winbind and Windows Clients

My Logs looks like ok i can?t found errors?

my last restart of Samba and Winbind was 2 days before.

Now after restart winbind (not samba) works again for next?

Linux knows the ID of group (used with force user in share) but lost wbinfo -g 

Here is an config of my share where happen.

[Kundendaten]

   path = /daten/kundendaten

   browseable = yes

   writeable = yes

   force group = Kontrast_Intern

   valid users = @Kontrast_Intern

   create mask = 0660

   directory mask = 0770

   #oplocks = 0

   vfs objects = full_audit recycle

   full_audit:prefix = %u

   full_audit:success = mkdir rename rmdir unlink pwrite

   full_audit:failure = none

   full_audit:facility = LOCAL5

   full_audit:priority = NOTICE

   recycle:versions = yes

   recycle:exclude = .*, ~*

Next Information:

Our DCs are in other VLAN as member and WinClients so there is maybe a problem?

Multi-/Anycast?

kind regards

OLIVER WERNER
System-Administrator

Kontrast Communication Services GmbH 
Grafenberger Allee 100, 40237 Düsseldorf, Germany

Fon  +49-211-91505-500
Fax +49-211-91505-530
www.kontrast.de

Amtsgericht Düsseldorf: HRB 26934
Geschäftsführer: Joachim Fischer, Anja Grote-Lutter, Leontine van der Vlist

Am 22.03.2016 um 11:08 schrieb L.P.H. van Belle <belle at bazuin.nl>:

Any errors atm in 

syslog and/or messages

and the samba logs.

And the interval of the problem, still 5 days? 

Gr. 

Louis

Van: Oliver Werner [mailto:oliver.werner at kontrast.de] 
Verzonden: dinsdag 22 maart 2016 11:00
Aan: L.P.H. van Belle
CC: samba at lists.samba.org
Onderwerp: Re: [Samba] Problem with Winbind and Windows Clients

Hi,

now i have tested again with libdefaults and same problems again? :(

So maybe we can found next tests with this informations:

1. 

the problem looks only happen on systems where much users will login.

i have an archivesystem as samba member where ~10 users login => here we not have the issue.

Also i have windows clients where only 3 persons can login => also not happen

BUT:

Samba Member where ~80-100 Users login over a day => problem will happen

Also i have an windows client where ~80-100 Users login that will also happen

2.

I?m using Samba 4.1.17 Debian Pkg.

kind regards

OLIVER WERNER
System-Administrator

Kontrast Communication Services GmbH 
Grafenberger Allee 100, 40237 Düsseldorf, Germany

Fon  +49-211-91505-500
Fax +49-211-91505-530
www.kontrast.de

Amtsgericht Düsseldorf: HRB 26934
Geschäftsführer: Joachim Fischer, Anja Grote-Lutter, Leontine van der Vlist

Am 18.03.2016 um 09:47 schrieb Oliver Werner <oliver.werner at kontrast.de>:

Ok i will test it.

So i have one more information that can maybe help?

the problem looks only happen on systems where much users will login.

i have an archive system as samba member where ~10 users login => here we not have the issue.

Also i have windows clients where only 3 persons can login => also not happen

BUT:

Samba Member where ~80-100 Users login over a day => problem will happen

Also i have an windows client where ~80-100 Users login that will also happen

that can help for more ideas :)?

Greetz

OLIVER WERNER
System-Administrator

Kontrast Communication Services GmbH 
Grafenberger Allee 100, 40237 Düsseldorf, Germany

Fon  +49-211-91505-500
Fax +49-211-91505-530
www.kontrast.de

Amtsgericht Düsseldorf: HRB 26934
Geschäftsführer: Joachim Fischer, Anja Grote-Lutter, Leontine van der Vlist

Am 18.03.2016 um 09:31 schrieb L.P.H. van Belle <belle at bazuin.nl>:

Ok, 

Its still every 5 days?  

Change krb5.conf to  on DC and Member servers to

[libdefaults]

    default_realm = HQ.KONTRAST

    dns_lookup_kdc = true

    dns_lookup_realm = false

    ticket_lifetime = 24h

    ccache_type = 4

    forwardable = true

    proxiable = true

Now Reboot DC and Member  and pc. 

This is how im run my config and i have multiple pc?s always logged in. 

My last option. :-/  you configs are good, so im getting out of options. 

Optionaly you can also try to recreate you keytab file. ( backup old ) 

But thats normaly not needed, i do that if i changes for example ?password expires ? on a service account user. 

Greetz, 

Louis

Van: Oliver Werner [mailto:oliver.werner at kontrast.de] 
Verzonden: vrijdag 18 maart 2016 9:11
Aan: L.P.H. van Belle
CC: samba at lists.samba.org
Onderwerp: Re: [Samba] Problem with Winbind and Windows Clients

Hi,

Next test is failed.

My Windows Clients lost everytime AD Authentication so i need to reboot.

On Samba i need also to restart winbind service since some hours?

here my samba and wind bind Versions

Samba: Version 4.1.17-Debian

Winbind: Version 4.1.17-Debian

Greetz

OLIVER WERNER
System-Administrator

Kontrast Communication Services GmbH 
Grafenberger Allee 100, 40237 Düsseldorf, Germany

Fon  +49-211-91505-500
Fax +49-211-91505-530
www.kontrast.de

Amtsgericht Düsseldorf: HRB 26934
Geschäftsführer: Joachim Fischer, Anja Grote-Lutter, Leontine van der Vlist

Am 15.03.2016 um 11:10 schrieb L.P.H. van Belle <belle at bazuin.nl>:

Ok, next test. 

Change :
kerberos method = secrets and keytab 
to 
kerberos method = secrets

and wait again. 

I'll explain by giving this link. 
http://changelogs.ubuntu.com/changelogs/pool/main/s/samba/samba_4.3.6+dfsg-1ubuntu1/changelog 

Look at the last line bugfix in this change log of 4.3.6.
Im testing here also, because this looks like its also involves the kerberos changes, now, i forgot what you was running, but this is an easy test. 

Is ntp installed on this machine, if not, install it and point it to the DC. 
Just to be sure. 
On the DC's, make sure your DC dont use any pool ntp servers. 
Point it to a stable ntp. ( preffered in germany, like, ntps1-0.eecsit.tu-berlin.de (130.149.17.21) )

Greetz, 

Louis

-----Oorspronkelijk bericht-----
Van: samba [mailto:samba-bounces at lists.samba.org] Namens Oliver Werner
Verzonden: dinsdag 15 maart 2016 10:43
Aan: Rowland penny
CC: samba at lists.samba.org
Onderwerp: Re: [Samba] Problem with Winbind and Windows Clients

Hi,

So now i have same Problem with Logins.

On Linux AD member i need to restart win bind again and again for working
samba shares.
On Windows clients i need to restart machine completely

so now i don?t have any idea

kind regards

OLIVER WERNER
System-Administrator

Kontrast Communication Services GmbH
Grafenberger Allee 100, 40237 Düsseldorf, Germany

Fon  +49-211-91505-500
Fax +49-211-91505-530
www.kontrast.de <http://www.kontrast.de/>

Amtsgericht Düsseldorf: HRB 26934
Geschäftsführer: Joachim Fischer, Anja Grote-Lutter, Leontine van der
Vlist

<https://www.facebook.com/kontrast.communication>
<https://twitter.com/KONTRAST_de>
<http://www.xing.com/companies/kontrastcommunicationservicesgmbh>
<http://www.linkedin.com/company/kontrast-communication-services-gmbh>
<https://vimeo.com/kontrastcs>     <http://instagram.com/kontrast_de>

Am 11.03.2016 um 10:52 schrieb Oliver Werner

<oliver.werner at kontrast.de>:

Ok, now my smb.con on DCs looks

[global]
 workgroup = HQKONTRAST
 realm = HQ.KONTRAST
 netbios name = VL0227
 server role = active directory domain controller
 idmap_ldb:use rfc2307 = yes
 interfaces = eth0:35
 bind interfaces only=yes
 log level = 3

 tls enabled  = yes
 tls keyfile  = /var/lib/samba/private/tls/key.pem
 tls certfile = /var/lib/samba/private/tls/cert.pem
 tls cafile   = /var/lib/samba/private/tls/ca.pem

on Member smb.conf
[global]
     netbios name = VL0173
     security = ADS
     workgroup = HQKONTRAST
     realm = hq.kontrast

     log file = /var/log/samba/%m.log
     log level = 3

     dedicated keytab file = /etc/krb5.keytab
     kerberos method = secrets and keytab
     winbind refresh tickets = yes

     winbind trusted domains only = no
     winbind use default domain = yes
     winbind enum users  = yes
     winbind enum groups = yes
     winbind cache time = 300

     # Default idmap config used for BUILTIN and local accounts/groups
     idmap config *:backend = tdb
     idmap config *:range = 500-1023

     # idmap config for domain HQKONTRAST
     idmap config HQKONTRAST:backend = ad
     idmap config HQKONTRAST:schema_mode = rfc2307
     idmap config HQKONTRAST:range = 1024-99999

     # Use settings from AD for login shell and home directory
     winbind nss info = rfc2307

and on all machines krb5.conf
[libdefaults]
default_realm = HQ.KONTRAST
dns_lookup_realm = false
dns_lookup_kdc = true

I will test it next days.

Thanks for help right now :D

kind regards
OLIVER WERNER
System-Administrator

Kontrast Communication Services GmbH
Grafenberger Allee 100, 40237 Düsseldorf, Germany

Fon  +49-211-91505-500
Fax  +49-211-91505-530
www.kontrast.de <http://www.kontrast.de/>

Amtsgericht Düsseldorf: HRB 26934
Geschäftsführer: Joachim Fischer, Anja Grote-Lutter, Leontine van der

Vlist

<https://www.facebook.com/kontrast.communication>

<https://twitter.com/KONTRAST_de>
<http://www.xing.com/companies/kontrastcommunicationservicesgmbh>
<http://www.linkedin.com/company/kontrast-communication-services-gmbh>
<https://vimeo.com/kontrastcs>     <http://instagram.com/kontrast_de>

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Am 11.03.2016 um 10:47 schrieb Rowland penny <rpenny at samba.org>:

On 11/03/16 09:40, Oliver Werner wrote:

Haha, really? :D

It should be possible without reboot not?

OLIVER WERNER
System-Administrator

Yes, remove the kdc lines :-D

Rowland

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