[Samba] Samba update cause windows incorrect password

Fri Apr 24 13:02:33 UTC 2020

On Fri, 24 Apr 2020 13:15:57 +0100
Rowland penny via samba <samba at lists.samba.org> wrote:

> On 24/04/2020 12:32, Enrico Morelli via samba wrote:
> > On Fri, 24 Apr 2020 11:59:23 +0100
> > Rowland penny via samba <samba at lists.samba.org> wrote:
> >  
> >> On 24/04/2020 11:38, Enrico Morelli via samba wrote:  
> >>> On Thu, 23 Apr 2020 08:08:39 +1200
> >>> Andrew Bartlett via samba <samba at lists.samba.org> wrote:
> >>>     
> >>>> On Wed, 2020-04-22 at 20:01 +0100, Rowland penny via samba
> >>>> wrote:  
> >>>>> On 22/04/2020 19:25, Enrico Morelli via samba wrote:  
> >>>>>>> On 22/04/2020 16:06, Enrico Morelli via samba wrote:  
> >>>>>>>> Dear,
> >>>>>>>>
> >>>>>>>> on my debian system I upgraded samba from 4.5.16 to 4.9.5. My
> >>>>>>>> samba
> >>>>>>>> server is configured as domain controller.
> >>>>>>>>
> >>>>>>>> Now happens a strange thing. From a windows 10 client I'm
> >>>>>>>> able to login
> >>>>>>>> with a domain user without problem. But if I logout and try
> >>>>>>>> to enter
> >>>>>>>> the password for the same user, Windows tells me that the
> >>>>>>>> password is
> >>>>>>>> incorrect.
> >>>>>>>>
> >>>>>>>> To be able to loing, I've to select Other User, enter
> >>>>>>>> username and
> >>>>>>>> password and all works fine. But if I logout and enter the
> >>>>>>>> same password, Windows tells me "Incorrect password".
> >>>>>>>>         
> >>>>> Apart from multiple default lines, there doesn't seem to
> >>>>> anything really
> >>>>> wrong with your smb.conf, so it looks like this could be yet
> >>>>> another reason to not use Windows 10 with an NT4-style PDC.
> >>>>>
> >>>>> You could try raising the log level, add 'log level = 10' to the
> >>>>> smb.conf and restart Samba, but beware, this will lead to a lot
> >>>>> of output.  
> >>>> Thanks Rowland.  This is the right approach.  Once we get that,
> >>>> we should be (even log level 5 would show it) able to work out
> >>>> what username form was being sent in both cases, and see if we
> >>>> can map between them.
> >>>>
> >>>> Andrew Bartlett
> >>>>     
> >>> I'd set the loglevel to 5 and happens a strange thing:
> >>>
> >>> SAM Logon (Interactive). Domain:[CERMDOMAIN].
> >>> User:[visitor2 at STUDENTI2] Requested Domain:[DOMAIN]
> >>> [2020/04/24 12:04:50.144675,
> >>> 5] ../source3/rpc_server/netlogon/srv_netlog_nt.c:1628(_netr_LogonSamLogon_base)
> >>> Attempting validation level 3 for unmapped username visitor2.
> >>> [2020/04/24 12:04:50.144698,
> >>> 5] ../source3/auth/auth.c:412(load_auth_module) load_auth_module:
> >>> Attempting to find an auth method to match sam_netlogon3
> >>> [2020/04/24 12:04:50.144715,
> >>> 5] ../source3/auth/auth.c:437(load_auth_module) load_auth_module:
> >>> auth method sam_netlogon3 has a valid init [2020/04/24
> >>> 12:04:50.144729, 5] ../source3/auth/auth.c:412(load_auth_module)
> >>> load_auth_module: Attempting to find an auth method to match
> >>> winbind [2020/04/24 12:04:50.144743,
> >>> 5] ../source3/auth/auth.c:437(load_auth_module) load_auth_module:
> >>> auth method winbind has a valid init [2020/04/24 12:04:50.144894,
> >>> 5] ../source3/auth/auth_util.c:122(make_user_info_map) Mapping
> >>> user [DOMAIN]\[visitor2] from workstation [STUDENTI2] [2020/04/24
> >>> 12:04:50.144910,
> >>> 5] ../source3/auth/user_info.c:64(make_user_info) attempting to
> >>> make a user_info for visitor2 (visitor2) [2020/04/24
> >>> 12:04:50.144962,
> >>> 3] ../source3/auth/auth.c:189(auth_check_ntlm_password)
> >>> check_ntlm_password:  Checking password for unmapped user
> >>> [DOMAIN]\[visitor2]@[STUDENTI2] with the new password interface
> >>> [2020/04/24 12:04:50.144978,
> >>> 3] ../source3/auth/auth.c:192(auth_check_ntlm_password)
> >>> check_ntlm_password:  mapped user is:
> >>> [DOMAIN]\[visitor2]@[STUDENTI2] [2020/04/24 12:04:50.145020,
> >>> 5] ../source3/auth/auth_sam.c:162(auth_sam_netlogon3_auth)
> >>> auth_sam_netlogon3_auth: DOMAIN is not our domain name (DC for
> >>> CERMDOMAIN) 2020/04/24 12:04:50.145228,
> >>> 5] ../source3/auth/auth.c:251(auth_check_ntlm_password)
> >>> auth_check_ntlm_password: winbind authentication for user
> >>> [visitor2] FAILED with error NT_STATUS_NO_SUCH_USER,
> >>> authoritative=0 [2020/04/24 12:04:50.145246,
> >>> 2] ../source3/auth/auth.c:334(auth_check_ntlm_password)
> >>> check_ntlm_password:  Authentication for user [visitor2] ->
> >>> [visitor2] FAILED with error NT_STATUS_NO_SUCH_USER,
> >>> authoritative=0 [2020/04/24 12:04:50.145276,
> >>> 2] ../auth/auth_log.c:610(log_authentication_event_human_readable)
> >>> Auth: [SamLogon,(null)] user [DOMAIN]\[visitor2] at [Fri, 24 Apr
> >>> 2020 12:04:50.145263 CEST] with [Supplied-NT-Hash] status
> >>> [NT_STATUS_NO_SUCH_USER] workstation [STUDENTI2] remote host
> >>> [ipv4:192.168.100.12:51475] mapped to [DOMAIN]\[visitor2]. local
> >>> host [ipv4:192.168.100.27:445]
> >>>
> >>>
> >>> Seems like the studenti2 PC is in a wrong domain, but I checked
> >>> that and it is on the correct CERMDOMAIN domain.
> >>> In the past we had an old samba server that served as DC for
> >>> DOMAIN domain. But now, all the machine are configured to use the
> >>> new domain and before the update all worked fine.
> >>>
> >>> I'm very confused because this is the behavior of all the windows
> >>> 10 machines in the domain.
> >>>
> >>> I also tried to remove the studenti2 machine from the domain and
> >>> put it again without any result.
> >>>     
> >> Problem is that you posted this in your smb.conf:
> >>
> >>       workgroup = DOMAIN
> >>
> >> Is the 'DOMAIN' actually 'CERMDOMAIN' ? or is it something else ?
> >>
> >> Rowland  
> > The actual domain is CERMDOMAIN. Sorry.  
> 
> OK, at the top of your log fragment is this:
> 
> SAM Logon (Interactive). Domain:[CERMDOMAIN].
> User:[visitor2 at STUDENTI2] Requested Domain:[DOMAIN]
> 
> So, your actual Domain is 'CERMDOMAIN', but the Win 10 machine seems
> to be sending 'DOMAIN', which isn't 'CERMDOMAIN', is this correct ?
> 
> If it is, then the problem seems to be a Windows one, it doesn't look 
> like it is sending the correct data. Do you recognise what 'DOMAIN'
> is ? Is it the dns domain ? or the name of the computer ?
> 
> Rowland
> 

Really I don't know. It isn't a dns domain not the computer name (it's
studenti2). DOMAIN is the domain I used before CERMDOMAIN, but I hadn't
problem before the update. Really I don't understand, because as I
wrote, if I login the user after a reboot I'm able to enter, but if I
logout the user and try to re-enter I receive Incorrect password. So
I've to enter as Other user and with the same username and password
I'm able to enter. I'm going crazy. 

-- 
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  Enrico Morelli
  System Administrator | Programmer | Web Developer

  CERM - Polo Scientifico
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