[Samba] Failed to find authenticated user via getpwnam(), denying access

[Krutskikh Ivan]

Hi,

I have a very strange issue with samba as an ad member server.

log.smbd goes:

  check_ntlm_password:  Checking password for unmapped user
[TSNR]\[Administrator]@[ADMIN] with the new password interface
[2015/11/27 19:09:26.196960,  3]
../source3/auth/auth.c:180(auth_check_ntlm_password)
  check_ntlm_password:  mapped user is: [TSNR]\[Administrator]@[ADMIN]
[2015/11/27 19:09:26.196993,  4] ../source3/smbd/sec_ctx.c:216(push_sec_ctx)
  push_sec_ctx(0, 0) : sec_ctx_stack_ndx = 1
[2015/11/27 19:09:26.197021,  4] ../source3/smbd/uid.c:485(push_conn_ctx)
  push_conn_ctx(0) : conn_ctx_stack_ndx = 0
[2015/11/27 19:09:26.197046,  4] ../source3/smbd/sec_ctx.c:316(set_sec_ctx)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 1
[2015/11/27 19:09:26.201658,  4] ../source3/smbd/sec_ctx.c:424(pop_sec_ctx)
  pop_sec_ctx (0, 0) - sec_ctx_stack_ndx = 0
[2015/11/27 19:09:26.201780,  3]
../source3/auth/auth_util.c:1247(check_account)
  Failed to find authenticated user TSNR\administrator via getpwnam(),
denying access.
[2015/11/27 19:09:26.201846,  2]
../source3/auth/auth.c:288(auth_check_ntlm_password)
  check_ntlm_password:  Authentication for user [Administrator] ->
[Administrator] FAILED with error NT_STATUS_NO_SUCH_USER
[2015/11/27 19:09:26.201893,  2]
../auth/gensec/spnego.c:743(gensec_spnego_server_negTokenTarg)
  SPNEGO login failed: NT_STATUS_NO_SUCH_USER

wbinfo -g -u shows all my domain users and groups, domain uses rfc-2307 and
all unix attrs are in place.

The weirdest thing is that this happens on 3 servers out of 4 in the
system. All configs are more or less identical.

Please help me narrow down this issue.

Thanks in advance!