[Samba] FAILED with error NT_STATUS_WRONG_PASSWORD, authoritative=1

[basti]

On 05.10.20 09:37, basti via samba wrote:
> Hello I have a Problem with one windows 10 client.
> 
> [2020/10/05 09:21:47.356628,  2]
> ../source3/auth/auth.c:334(auth_check_ntlm_password)
>   check_ntlm_password:  Authentication for user [ap31] -> [ap31] FAILED
> with error NT_STATUS_WRONG_PASSWORD, authoritative=1
> [2020/10/05 09:21:47.356724,  2]
> ../auth/auth_log.c:610(log_authentication_event_human_readable)
>   Auth: [SMB2,(null)] user [.]\[ap31] at [Mo, 05 Okt 2020
> 09:21:47.356700 CEST] with [NTLMv2] status [NT_STATUS_WRONG_PASSWORD]
> workstation [AP31-PC] remote host [ipv4:192.168.0.54:49927] mapped to
> [.]\[ap31]. local host [ipv4:192.168.0.100:445]
>   {"timestamp": "2020-10-05T09:21:47.356848+0200", "type":
> "Authentication", "Authentication": {"version": {"major": 1, "minor":
> 0}, "status": "NT_STATUS_WRONG_PASSWORD", "localAddress":
> "ipv4:192.168.0.100:445", "remoteAddress": "ipv4:192.168.0.54:49927",
> "serviceDescription": "SMB2", "authDescription": null, "clientDomain":
> ".", "clientAccount": "ap31", "workstation": "AP31-PC", "becameAccount":
> null, "becameDomain": null, "becameSid": null, "mappedAccount": "ap31",
> "mappedDomain": ".", "netlogonComputer": null, "netlogonTrustAccount":
> null, "netlogonNegotiateFlags": "0x00000000",
> "netlogonSecureChannelType": 0, "netlogonTrustAccountSid": null,
> "passwordType": "NTLMv2", "duration": 4333}}
> 
> It looks that the client use NTLMv2.
> 
> The smb.conf on this server is:
> 
> root at server:/var/log/samba# egrep -v "(^#|^$|^;)" /etc/samba/smb.conf
> [global]
>    workgroup = WORKGROUP
>    local master = yes
>    preferred master = yes
>    os level = 210
>    server string = Samba Server
>    log file = /var/log/samba/log.%m
>    log level = 2
>    max log size = 1000
>    logging = file
>    panic action = /usr/share/samba/panic-action %d
>    server role = standalone server
>    obey pam restrictions = yes
>    passwd program = /usr/bin/passwd %u
>    passwd chat = *Enter\snew\s*\spassword:* %n\n
> *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
>    pam password change = yes
>    map to guest = bad user
>    admin users = ap19 ap30
>    passdb backend = tdbsam
>    security = user
>    ntlm auth = yes
>    usershare allow guests = yes
> [homes]
> ...
> 
> When I use smbclient with username and passwd it works without problems.
> 
> 
When i use the IP address to connect to the server is works.
I have no idea whats wrong there.