[Samba] upgrading the existing SAMBA 2.7 to 4.3.8 version and getting authentication error.

[Kathirvel Gopinath]

Hi Team,
Good day!

We are upgrading the SAMBA version 2.7 fro 4.3.8 in our AIX server which is
running in AIX 6.1 version. and SAMBA share all accessed by windows 7
client.

after upgrading to version 4.3.8 user's notable to connect the SAMBA share
and getting access denied error. In earlier version we have used
*security=server* option and had pass thru server for Authentication. now
we couldn't use that option and getting. Please advise what is default
setting for samba version 4 and how to enable the user authentication?


Hostname:root:/home/root # testparm /etc/samba/smb.conf
Load smb config files from /etc/samba/smb.conf
*WARNING: Ignoring invalid value 'server' for parameter 'security'*
*Error loading services.*


*Authentication Error:-*

2016/09/30 11:32:10.121823,  3]
../source3/auth/auth.c:178(auth_check_ntlm_password)
  check_ntlm_password:  Checking password for unmapped user
[Domain]\[User]@[Local hostname] with the new password interface
[2016/09/30 11:32:10.121873,  3]
../source3/auth/auth.c:181(auth_check_ntlm_password)
  check_ntlm_password:  mapped user is: [SAMBA server name]\[User]@[Local
Hostname]
[2016/09/30 11:32:10.122005,  3]
../source3/auth/check_samsec.c:400(check_sam_security)
  check_sam_security: Couldn't find user 'User' in passdb.
[2016/09/30 11:32:10.122049,  2]
../source3/auth/auth.c:315(auth_check_ntlm_password)
  check_ntlm_password:  Authentication for user [User] -> [User] FAILED
with error NT_STATUS_NO_SUCH_USER
[2016/09/30 11:32:10.122122,  2]
../auth/gensec/spnego.c:708(gensec_spnego_server_negTokenTarg)
  SPNEGO login failed: NT_STATUS_NO_SUCH_USER
[2016/09/30 11:32:10.124730,  3]
../source3/smbd/server_exit.c:252(exit_server_common)
  Server exit (NT_STATUS_CONNECTION_RESET)

Regards
Gopi