[Samba] NT_STATUS_ACCOUNT_LOCKED_OUT

[Mark Foley]

I sure could use some help on this.  Perhaps this problem is due to a recent Windows update?

I have determined that whenever I log into the Windows 7 host DBSERVER from any other Windows 7
computer, whether it be a local domain workstation or an external computer, and regarless of
whether the client workstation is logged in as 'mark' or any other user, I have the lockout
problem.

As soon as I log into Windows 7 host dbserver as the domain administrator I immediately see
series 10 to 15 of the following log.samba messages:

  Auth: [Kerberos KDC,ENC-TS Pre-authentication] user [(null)]\[mark at HPRS] at [Sat, 19 Jan 2019 12:18:27.881822 EST] with [arcfour-hmac-md5] status [NT_STATUS_WRONG_PASSWORD] workstation [(null)] remote host [ipv4:192.168.0.4:53914] mapped to [HPRS]\[mark]. local host [NULL] 

Then, if I try to log into ANY domain member as user 'mark' I cannot and the log.samba has:

  auth_check_password_recv: sam authentication for user [HPRS\mark] FAILED with error NT_STATUS_ACCOUNT_LOCKED_OUT, authoritative=1
  Auth: [SamLogon,network] user [HPRS]\[mark] at [Sat, 19 Jan 2019 12:28:06.590937 EST] with [NTLMv2] status [NT_STATUS_ACCOUNT_LOCKED_OUT] workstation [WIN7VM] remote host [ipv4:192.168.0.4:54336] mapped to [HPRS]\[mark]. local host [ipv4:192.168.0.2:49153]  NETLOGON computer [DBSERVER] trust account [DBSERVER$]

The administrator user does not map any drives or otherwise seem to run anything as user 'mark'.

I cannot figure out why something is trying to login/connect as user 'mark' with an invalid
password even when logging in as the administrator, not 'mark'. 

Furthermore, when I do actually log into this computer as 'mark' and enter the correct PW, it
works fine, no Auth errors. 

Could someone point me in the right direction for research? 

--Mark

-----Original Message-----
Date: Thu, 17 Jan 2019 19:22:16 -0500
To: samba at lists.samba.org
Subject: [Samba] NT_STATUS_ACCOUNT_LOCKED_OUT

I'm having a very annoying problem I can't figure out. I've been running Samba4 as our office
AD/DC for several years. This is a recent problem.

Whenever I Remote Desktop into a particular Windows workstation (192.168.0.4) I get the
following message in /var/log/samba/log.samba:

  Auth: [Kerberos KDC,ENC-TS Pre-authentication] user [(null)]\[mark at HPRS] at [Thu, 17 Jan 2019 18:43:26.477871 EST] with [arcfour-hmac-md5] status [NT_STATUS_WRONG_PASSWORD] workstation [(null)] remote host [ipv4:192.168.0.4:54315] mapped to [HPRS]\[mark]. local host [NULL]

This message repeats in groups of 3 every 5 minutes for as long as I am logged into this
computer.  It does not matter if I am remoting in from another Windows host on the LAN (as
domain user 'mark') or if I am logging from a remote, non-domain computer.  I am not logging
into the target computer as my domain id 'mark'.  When logging in from a LAN workstations, I am
logged into the original workstation as domain user 'mark', but when logging in from a remote
computer I am not user 'mark' on any remote.  I am remote desktopping into the target computer
as the AD Domain Administrator.  So, I don't know where it's getting the "user
[(null)]\[mark at HPRS]" bit from. 

After some period of time (or some number of "wrong password" messages), my account gets locked
out. The next time I try logging in from Remote desktop, or if I try ntlm_auth, I get the
following message:

  auth_check_password_recv: sam authentication for user [HPRS\mark] FAILED with error NT_STATUS_ACCOUNT_LOCKED_OUT, authoritative=1
[2019/01/17 00:24:22.733958,  2] ../auth/auth_log.c:760(log_authentication_event_human_readable)

At this point I have to go into ADUC and disable and re-enable the user account in order to be
able to log back in.

Does anyone have any idea what is going on and how to fix this?

THX --Mark

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