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francis picabia

2016-Aug-08 13:24 UTC

[Samba] why does add_local_groups come up in only one system's logs?

I have a couple of Debian 8.5 systems set up in similar manner.  Samba is
version 4.2.10-Debian

Here is the essential config...

# testparm /etc/samba/smb.conf
Load smb config files from /etc/samba/smb.conf
Processing section "[homes]"
Loaded services file OK.
Server role: ROLE_DOMAIN_MEMBER

Press enter to see a dump of your service definitions

# Global parameters
[global]
        workgroup = MYDOM
        realm = AD.MYDOM.CA
        server string = debian2 Server
        security = ADS
        log file = /var/log/samba/%m.log
        max log size = 50
        unix extensions = No
        load printers = No
        printcap name = /dev/null
        disable spoolss = Yes
        dns proxy = No
        winbind enum users = Yes
        winbind enum groups = Yes
        winbind use default domain = Yes
        idmap config * : range = 1000-1999999
        idmap config * : backend = tdb
        nt acl support = No
        printing = bsd


[homes]
        comment = Home Directories
        path = %H
        valid users = %U at mydom
        read only = No
        create mask = 0700
        directory mask = 0700
        browseable = No
        wide links = Yes

/etc/pam.d/samba, /etc/nsswitch.conf and /etc/krb5.conf are the same
configuration on both systems.  The first one allows a connection
to the homes.  Here is a tail on the log file:

[2016/08/08 09:42:49.956619,  3]
../source3/auth/auth.c:178(auth_check_ntlm_password)
  check_ntlm_password:  Checking password for unmapped user
[MYDOM]\[username]@[DEBIAN1] with the new password interface
[2016/08/08 09:42:49.956656,  3]
../source3/auth/auth.c:181(auth_check_ntlm_password)
  check_ntlm_password:  mapped user is: [MYDOM]\[username]@[DEBIAN1]
[2016/08/08 09:42:49.961548,  3]
../source3/auth/auth.c:249(auth_check_ntlm_password)
  check_ntlm_password: winbind authentication for user [username] succeeded
[2016/08/08 09:42:49.961610,  2]
../source3/auth/auth.c:305(auth_check_ntlm_password)
  check_ntlm_password:  authentication for user [username] -> [username]
->
[username] succeeded
[2016/08/08 09:42:49.961671,  3]
../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
  NTLMSSP Sign/Seal - Initialising with flags:
[2016/08/08 09:42:49.961699,  3]
../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
  Got NTLMSSP neg_flags=0x62088215
[2016/08/08 09:42:49.961748,  3]
../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
  NTLMSSP Sign/Seal - Initialising with flags:
[2016/08/08 09:42:49.961772,  3]
../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
  Got NTLMSSP neg_flags=0x62088215
[2016/08/08 09:42:50.271337,  3]
../source3/param/loadparm.c:1427(lp_add_home)
  adding home's share [username] for user 'username' at '%H'

The second server fails with the add_local_groups and getpwuid:

[2016/08/08 09:53:55.146840,  3]
../source3/auth/auth.c:178(auth_check_ntlm_password)
  check_ntlm_password:  Checking password for unmapped user
[MYDOM]\[username]@[DEBIAN2] with the new password interface
[2016/08/08 09:53:55.146867,  3]
../source3/auth/auth.c:181(auth_check_ntlm_password)
  check_ntlm_password:  mapped user is: [MYDOM]\[username]@[DEBIAN2]
[2016/08/08 09:53:55.150852,  3]
../source3/auth/auth.c:249(auth_check_ntlm_password)
  check_ntlm_password: winbind authentication for user [username] succeeded
[2016/08/08 09:53:55.150902,  2]
../source3/auth/auth.c:305(auth_check_ntlm_password)
  check_ntlm_password:  authentication for user [username] -> [username]
->
[username] succeeded
[2016/08/08 09:53:55.150960,  3]
../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
  NTLMSSP Sign/Seal - Initialising with flags:
[2016/08/08 09:53:55.150978,  3]
../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
  Got NTLMSSP neg_flags=0x62088215
[2016/08/08 09:53:55.151024,  3]
../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
  NTLMSSP Sign/Seal - Initialising with flags:
[2016/08/08 09:53:55.151036,  3]
../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
  Got NTLMSSP neg_flags=0x62088215
[2016/08/08 09:53:55.151321,  1]
../source3/auth/token_util.c:430(add_local_groups)
  SID S-1-5-21-82194667-1315141139-1877560073-12331 -> getpwuid(16777216)
failed
[2016/08/08 09:53:55.151348,  3]
../source3/auth/token_util.c:316(create_local_nt_token_from_info3)
  Failed to finalize nt token


I am so far unable to find why the getpwuid for add_local_groups matters,
or why only one system even mentions it in the logfile trace.  The default
group ID is listed in /etc/group for the user and the home directory with
ls -ld looks fine with 700 chmod
for the home directory in both servers.

Rowland Penny

2016-Aug-08 13:54 UTC

head link

[Samba] why does add_local_groups come up in only one system's logs?

On Mon, 8 Aug 2016 10:24:03 -0300
francis picabia <fpicabia at gmail.com> wrote:
> I have a couple of Debian 8.5 systems set up in similar manner.
> Samba is version 4.2.10-Debian
> 
> Here is the essential config...
> 
> # testparm /etc/samba/smb.conf
> Load smb config files from /etc/samba/smb.conf
> Processing section "[homes]"
> Loaded services file OK.
> Server role: ROLE_DOMAIN_MEMBER
> 
> Press enter to see a dump of your service definitions
> 
> # Global parameters
> [global]
>         workgroup = MYDOM
>         realm = AD.MYDOM.CA
>         server string = debian2 Server
>         security = ADS
>         log file = /var/log/samba/%m.log
>         max log size = 50
>         unix extensions = No
>         load printers = No
>         printcap name = /dev/null
>         disable spoolss = Yes
>         dns proxy = No
>         winbind enum users = Yes
>         winbind enum groups = Yes
>         winbind use default domain = Yes
>         idmap config * : range = 1000-1999999
>         idmap config * : backend = tdb
>         nt acl support = No
>         printing = bsd
> 
> 
> [homes]
>         comment = Home Directories
>         path = %H
>         valid users = %U at mydom
>         read only = No
>         create mask = 0700
>         directory mask = 0700
>         browseable = No
>         wide links = Yes
> 
> /etc/pam.d/samba, /etc/nsswitch.conf and /etc/krb5.conf are the same
> configuration on both systems.  The first one allows a connection
> to the homes.  Here is a tail on the log file:
> 
> [2016/08/08 09:42:49.956619,  3]
> ../source3/auth/auth.c:178(auth_check_ntlm_password)
>   check_ntlm_password:  Checking password for unmapped user
> [MYDOM]\[username]@[DEBIAN1] with the new password interface
> [2016/08/08 09:42:49.956656,  3]
> ../source3/auth/auth.c:181(auth_check_ntlm_password)
>   check_ntlm_password:  mapped user is: [MYDOM]\[username]@[DEBIAN1]
> [2016/08/08 09:42:49.961548,  3]
> ../source3/auth/auth.c:249(auth_check_ntlm_password)
>   check_ntlm_password: winbind authentication for user [username]
> succeeded [2016/08/08 09:42:49.961610,  2]
> ../source3/auth/auth.c:305(auth_check_ntlm_password)
>   check_ntlm_password:  authentication for user [username] ->
> [username] -> [username] succeeded
> [2016/08/08 09:42:49.961671,  3]
> ../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
>   NTLMSSP Sign/Seal - Initialising with flags:
> [2016/08/08 09:42:49.961699,  3]
> ../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
>   Got NTLMSSP neg_flags=0x62088215
> [2016/08/08 09:42:49.961748,  3]
> ../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
>   NTLMSSP Sign/Seal - Initialising with flags:
> [2016/08/08 09:42:49.961772,  3]
> ../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
>   Got NTLMSSP neg_flags=0x62088215
> [2016/08/08 09:42:50.271337,  3]
> ../source3/param/loadparm.c:1427(lp_add_home)
>   adding home's share [username] for user 'username' at
'%H'
> 
> The second server fails with the add_local_groups and getpwuid:
> 
> [2016/08/08 09:53:55.146840,  3]
> ../source3/auth/auth.c:178(auth_check_ntlm_password)
>   check_ntlm_password:  Checking password for unmapped user
> [MYDOM]\[username]@[DEBIAN2] with the new password interface
> [2016/08/08 09:53:55.146867,  3]
> ../source3/auth/auth.c:181(auth_check_ntlm_password)
>   check_ntlm_password:  mapped user is: [MYDOM]\[username]@[DEBIAN2]
> [2016/08/08 09:53:55.150852,  3]
> ../source3/auth/auth.c:249(auth_check_ntlm_password)
>   check_ntlm_password: winbind authentication for user [username]
> succeeded [2016/08/08 09:53:55.150902,  2]
> ../source3/auth/auth.c:305(auth_check_ntlm_password)
>   check_ntlm_password:  authentication for user [username] ->
> [username] -> [username] succeeded
> [2016/08/08 09:53:55.150960,  3]
> ../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
>   NTLMSSP Sign/Seal - Initialising with flags:
> [2016/08/08 09:53:55.150978,  3]
> ../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
>   Got NTLMSSP neg_flags=0x62088215
> [2016/08/08 09:53:55.151024,  3]
> ../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
>   NTLMSSP Sign/Seal - Initialising with flags:
> [2016/08/08 09:53:55.151036,  3]
> ../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
>   Got NTLMSSP neg_flags=0x62088215
> [2016/08/08 09:53:55.151321,  1]
> ../source3/auth/token_util.c:430(add_local_groups)
>   SID S-1-5-21-82194667-1315141139-1877560073-12331 ->
> getpwuid(16777216) failed
> [2016/08/08 09:53:55.151348,  3]
> ../source3/auth/token_util.c:316(create_local_nt_token_from_info3)
>   Failed to finalize nt token
> 
> 
> I am so far unable to find why the getpwuid for add_local_groups
> matters, or why only one system even mentions it in the logfile
> trace.  The default group ID is listed in /etc/group for the user and
> the home directory with ls -ld looks fine with 700 chmod
> for the home directory in both servers.
Are you using sssd ?
If not, where are you storing the users & groups ?

Rowland

francis picabia

2016-Aug-08 14:48 UTC

head link

[Samba] why does add_local_groups come up in only one system's logs?

On Mon, Aug 8, 2016 at 10:54 AM, Rowland Penny <rpenny at samba.org>
wrote:
> On Mon, 8 Aug 2016 10:24:03 -0300
> francis picabia <fpicabia at gmail.com> wrote:
>
> > I have a couple of Debian 8.5 systems set up in similar manner.
> > Samba is version 4.2.10-Debian
> >
> > Here is the essential config...
> >
> > # testparm /etc/samba/smb.conf
> > Load smb config files from /etc/samba/smb.conf
> > Processing section "[homes]"
> > Loaded services file OK.
> > Server role: ROLE_DOMAIN_MEMBER
> >
> > Press enter to see a dump of your service definitions
> >
> > # Global parameters
> > [global]
> >         workgroup = MYDOM
> >         realm = AD.MYDOM.CA
> >         server string = debian2 Server
> >         security = ADS
> >         log file = /var/log/samba/%m.log
> >         max log size = 50
> >         unix extensions = No
> >         load printers = No
> >         printcap name = /dev/null
> >         disable spoolss = Yes
> >         dns proxy = No
> >         winbind enum users = Yes
> >         winbind enum groups = Yes
> >         winbind use default domain = Yes
> >         idmap config * : range = 1000-1999999
> >         idmap config * : backend = tdb
> >         nt acl support = No
> >         printing = bsd
> >
> >
> > [homes]
> >         comment = Home Directories
> >         path = %H
> >         valid users = %U at mydom
> >         read only = No
> >         create mask = 0700
> >         directory mask = 0700
> >         browseable = No
> >         wide links = Yes
> >
> > /etc/pam.d/samba, /etc/nsswitch.conf and /etc/krb5.conf are the same
> > configuration on both systems.  The first one allows a connection
> > to the homes.  Here is a tail on the log file:
> >
> > [2016/08/08 09:42:49.956619,  3]
> > ../source3/auth/auth.c:178(auth_check_ntlm_password)
> >   check_ntlm_password:  Checking password for unmapped user
> > [MYDOM]\[username]@[DEBIAN1] with the new password interface
> > [2016/08/08 09:42:49.956656,  3]
> > ../source3/auth/auth.c:181(auth_check_ntlm_password)
> >   check_ntlm_password:  mapped user is: [MYDOM]\[username]@[DEBIAN1]
> > [2016/08/08 09:42:49.961548,  3]
> > ../source3/auth/auth.c:249(auth_check_ntlm_password)
> >   check_ntlm_password: winbind authentication for user [username]
> > succeeded [2016/08/08 09:42:49.961610,  2]
> > ../source3/auth/auth.c:305(auth_check_ntlm_password)
> >   check_ntlm_password:  authentication for user [username] ->
> > [username] -> [username] succeeded
> > [2016/08/08 09:42:49.961671,  3]
> > ../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
> >   NTLMSSP Sign/Seal - Initialising with flags:
> > [2016/08/08 09:42:49.961699,  3]
> > ../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
> >   Got NTLMSSP neg_flags=0x62088215
> > [2016/08/08 09:42:49.961748,  3]
> > ../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
> >   NTLMSSP Sign/Seal - Initialising with flags:
> > [2016/08/08 09:42:49.961772,  3]
> > ../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
> >   Got NTLMSSP neg_flags=0x62088215
> > [2016/08/08 09:42:50.271337,  3]
> > ../source3/param/loadparm.c:1427(lp_add_home)
> >   adding home's share [username] for user 'username' at
'%H'
> >
> > The second server fails with the add_local_groups and getpwuid:
> >
> > [2016/08/08 09:53:55.146840,  3]
> > ../source3/auth/auth.c:178(auth_check_ntlm_password)
> >   check_ntlm_password:  Checking password for unmapped user
> > [MYDOM]\[username]@[DEBIAN2] with the new password interface
> > [2016/08/08 09:53:55.146867,  3]
> > ../source3/auth/auth.c:181(auth_check_ntlm_password)
> >   check_ntlm_password:  mapped user is: [MYDOM]\[username]@[DEBIAN2]
> > [2016/08/08 09:53:55.150852,  3]
> > ../source3/auth/auth.c:249(auth_check_ntlm_password)
> >   check_ntlm_password: winbind authentication for user [username]
> > succeeded [2016/08/08 09:53:55.150902,  2]
> > ../source3/auth/auth.c:305(auth_check_ntlm_password)
> >   check_ntlm_password:  authentication for user [username] ->
> > [username] -> [username] succeeded
> > [2016/08/08 09:53:55.150960,  3]
> > ../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
> >   NTLMSSP Sign/Seal - Initialising with flags:
> > [2016/08/08 09:53:55.150978,  3]
> > ../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
> >   Got NTLMSSP neg_flags=0x62088215
> > [2016/08/08 09:53:55.151024,  3]
> > ../auth/ntlmssp/ntlmssp_sign.c:509(ntlmssp_sign_reset)
> >   NTLMSSP Sign/Seal - Initialising with flags:
> > [2016/08/08 09:53:55.151036,  3]
> > ../auth/ntlmssp/ntlmssp_util.c:69(debug_ntlmssp_flags)
> >   Got NTLMSSP neg_flags=0x62088215
> > [2016/08/08 09:53:55.151321,  1]
> > ../source3/auth/token_util.c:430(add_local_groups)
> >   SID S-1-5-21-82194667-1315141139-1877560073-12331 ->
> > getpwuid(16777216) failed
> > [2016/08/08 09:53:55.151348,  3]
> > ../source3/auth/token_util.c:316(create_local_nt_token_from_info3)
> >   Failed to finalize nt token
> >
> >
> > I am so far unable to find why the getpwuid for add_local_groups
> > matters, or why only one system even mentions it in the logfile
> > trace.  The default group ID is listed in /etc/group for the user and
> > the home directory with ls -ld looks fine with 700 chmod
> > for the home directory in both servers.
>
> Are you using sssd ?
> If not, where are you storing the users & groups ?
>
>I've never used sssd anywhere before nor here.  We're just trying to
make
this work
as it has before with Samba 3.x and security=ads with Active Directory on
MS Windows.

We have /etc/passwd and /etc/group on each system. They are not identical.

If I run: 'net ads group -U username | sort' on each system and compare,
they
show identical groups coming back from AD.

The Group ID on Linux is in the 500 range on the system which works OK, and
in the 1000 range on the system which does not work.  Same AD user is
tested with both systems.

We also use winbind on ssh authentication and this works fine on both
systems.

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