This is the what the samba log shows when trying to add a computer to the domain after being queried for a Domain Admin user/password:
[2014/06/17 12:14:56.603187, 2] ../source3/smbd/server.c:437(remove_child_pid)
Could not find child 30169 -- ignoring
[2014/06/17 12:15:05.343397, 3] ../source3/lib/access.c:338(allow_access)
Allowed connection from 10.10.10.109 (10.10.10.109)
[2014/06/17 12:15:05.343558, 3] ../source3/smbd/oplock.c:870(init_oplocks)
init_oplocks: initializing messages.
[2014/06/17 12:15:05.343739, 3] ../source3/smbd/process.c:1802(process_smb)
Transaction 0 of length 159 (0 toread)
[2014/06/17 12:15:05.343785, 3] ../source3/smbd/process.c:1405(switch_message)
switch message SMBnegprot (pid 30191) conn 0x0
[2014/06/17 12:15:05.344487, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [PC NETWORK PROGRAM 1.0]
[2014/06/17 12:15:05.344525, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [LANMAN1.0]
[2014/06/17 12:15:05.344553, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [Windows for Workgroups 3.1a]
[2014/06/17 12:15:05.344579, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [LM1.2X002]
[2014/06/17 12:15:05.344609, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [LANMAN2.1]
[2014/06/17 12:15:05.344636, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [NT LM 0.12]
[2014/06/17 12:15:05.344662, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [SMB 2.002]
[2014/06/17 12:15:05.344688, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [SMB 2.
]
[2014/06/17 12:15:05.344815, 3] ../source3/smbd/smb2_negprot.c:243(smbd_smb2_request_process_negprot)
Selected protocol SMB2_FF
[2014/06/17 12:15:05.345915, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'gssapi_spnego' registered
[2014/06/17 12:15:05.345950, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'gssapi_krb5' registered
[2014/06/17 12:15:05.345976, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'gssapi_krb5_sasl' registered
[2014/06/17 12:15:05.346004, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'schannel' registered
[2014/06/17 12:15:05.346045, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'spnego' registered
[2014/06/17 12:15:05.346073, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'ntlmssp' registered
[2014/06/17 12:15:05.346099, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'krb5' registered
[2014/06/17 12:15:05.346124, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'fake_gssapi_krb5' registered
[2014/06/17 12:15:05.347474, 3] ../lib/ldb-samba/ldb_wrap.c:320(ldb_wrap_connect)
ldb_wrap open of secrets.ldb
[2014/06/17 12:15:05.348409, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'sam' registered
[2014/06/17 12:15:05.348449, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'sam_ignoredomain' registered
[2014/06/17 12:15:05.348481, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'anonymous' registered
[2014/06/17 12:15:05.348513, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'winbind' registered
[2014/06/17 12:15:05.348543, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'winbind_wbclient' registered
[2014/06/17 12:15:05.348578, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'name_to_ntstatus' registered
[2014/06/17 12:15:05.348610, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'unix' registered
[2014/06/17 12:15:05.353076, 3] ../source3/smbd/negprot.c:671(reply_negprot)
Selected protocol SMB 2.
[2014/06/17 12:15:05.353649, 3] ../source3/smbd/smb2_negprot.c:243(smbd_smb2_request_process_negprot)
Selected protocol SMB2_10
[2014/06/17 12:15:05.354148, 3] ../lib/ldb-samba/ldb_wrap.c:320(ldb_wrap_connect)
ldb_wrap open of secrets.ldb
[2014/06/17 12:15:05.361466, 3] ../lib/ldb-samba/ldb_wrap.c:320(ldb_wrap_connect)
ldb_wrap open of secrets.ldb
[2014/06/17 12:15:05.363475, 3] ../auth/ntlmssp/ntlmssp_util.c:34(debug_ntlmssp_flags)
Got NTLMSSP neg_flags=0xe2088297
[2014/06/17 12:15:05.364516, 3] ../auth/ntlmssp/ntlmssp_server.c:358(ntlmssp_server_preauth)
Got user=[dcadmin] domain=[lan.abc.com] workstation=[D820] len1=24 len2=266
[2014/06/17 12:15:05.364577, 3] ../source4/auth/ntlm/auth.c:270(auth_check_password_send)
auth_check_password_send: Checking password for unmapped user [lan.abc.com]\[dcadmin]@[D820]
auth_check_password_send: mapped user is: [LAN]\[dcadmin]@[D820]
[2014/06/17 12:15:05.365668, 3] ../source4/auth/ntlm/auth_sam.c:65(authsam_search_account)
authsam_search_account: Couldn't find user [dcadmin] in samdb, under DC=lan,DC=abc,DC=com
[2014/06/17 12:15:05.366040, 3] ../source4/auth/ntlm/auth_sam.c:99(authsam_search_account)
authsam_search_account: Account for guest user is disabled.
[2014/06/17 12:15:05.366076, 2] ../source4/auth/ntlm/auth.c:420(auth_check_password_recv)
auth_check_password_recv: sam_ignoredomain authentication for user [LAN\dcadmin] FAILED with error NT_STATUS_NO_SUCH_USER
[2014/06/17 12:15:05.366118, 2] ../auth/gensec/spnego.c:743(gensec_spnego_server_negTokenTarg)
SPNEGO login failed: NT_STATUS_NO_SUCH_USER
[2014/06/17 12:15:05.366854, 3] ../source3/smbd/server_exit.c:221(exit_server_common)
Server exit (NT_STATUS_CONNECTION_RESET)
[2014/06/17 12:15:05.377099, 3] ../source3/lib/access.c:338(allow_access)
Allowed connection from 10.10.10.109 (10.10.10.109)
[2014/06/17 12:15:05.377256, 3] ../source3/smbd/oplock.c:870(init_oplocks)
init_oplocks: initializing messages.
[2014/06/17 12:15:05.377459, 3] ../source3/smbd/process.c:1802(process_smb)
Transaction 0 of length 108 (0 toread)
[2014/06/17 12:15:05.377584, 3] ../source3/smbd/smb2_negprot.c:243(smbd_smb2_request_process_negprot)
Selected protocol SMB2_10
[2014/06/17 12:15:05.379070, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'gssapi_spnego' registered
[2014/06/17 12:15:05.379105, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'gssapi_krb5' registered
[2014/06/17 12:15:05.379131, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'gssapi_krb5_sasl' registered
[2014/06/17 12:15:05.379175, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'schannel' registered
[2014/06/17 12:15:05.379202, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'spnego' registered
[2014/06/17 12:15:05.379228, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'ntlmssp' registered
[2014/06/17 12:15:05.379254, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'krb5' registered
[2014/06/17 12:15:05.379280, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'fake_gssapi_krb5' registered
[2014/06/17 12:15:05.380645, 3] ../lib/ldb-samba/ldb_wrap.c:320(ldb_wrap_connect)
ldb_wrap open of secrets.ldb
[2014/06/17 12:15:05.381594, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'sam' registered
[2014/06/17 12:15:05.381633, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'sam_ignoredomain' registered
[2014/06/17 12:15:05.381665, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'anonymous' registered
[2014/06/17 12:15:05.381696, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'winbind' registered
[2014/06/17 12:15:05.381726, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'winbind_wbclient' registered
[2014/06/17 12:15:05.381756, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'name_to_ntstatus' registered
[2014/06/17 12:15:05.381787, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'unix' registered
[2014/06/17 12:15:05.388047, 3] ../lib/ldb-samba/ldb_wrap.c:320(ldb_wrap_connect)
ldb_wrap open of secrets.ldb
[2014/06/17 12:15:05.389763, 3] ../auth/ntlmssp/ntlmssp_util.c:34(debug_ntlmssp_flags)
Got NTLMSSP neg_flags=0xe2088297
[2014/06/17 12:15:05.390572, 3] ../auth/ntlmssp/ntlmssp_server.c:358(ntlmssp_server_preauth)
Got user=[] domain=[] workstation=[D820] len1=1 len2=0
[2014/06/17 12:15:05.390631, 3] ../source4/auth/ntlm/auth.c:270(auth_check_password_send)
auth_check_password_send: Checking password for unmapped user []\[]@[D820]
auth_check_password_send: mapped user is: [LAN]\[]@[D820]
[2014/06/17 12:15:05.390766, 3] ../auth/ntlmssp/ntlmssp_sign.c:547(ntlmssp_sign_init)
NTLMSSP Sign/Seal - Initialising with flags:
[2014/06/17 12:15:05.390792, 3] ../auth/ntlmssp/ntlmssp_util.c:34(debug_ntlmssp_flags)
Got NTLMSSP neg_flags=0xe2088215
[2014/06/17 12:15:05.392375, 3] ../source3/lib/access.c:338(allow_access)
Allowed connection from 10.10.10.109 (10.10.10.109)
[2014/06/17 12:15:05.392520, 3] ../source3/smbd/service.c:612(make_connection_snum)
Connect path is '/tmp' for service [IPC$]
[2014/06/17 12:15:05.392617, 3] ../source3/smbd/vfs.c:113(vfs_init_default)
Initialising default vfs hooks
[2014/06/17 12:15:05.392710, 3] ../source3/smbd/vfs.c:139(vfs_init_custom)
Initialising custom vfs hooks from [/[Default VFS]/]
[2014/06/17 12:15:05.392760, 3] ../source3/smbd/vfs.c:139(vfs_init_custom)
Initialising custom vfs hooks from [acl_xattr]
[2014/06/17 12:15:05.394813, 2] ../lib/util/modules.c:191(do_smb_load_module)
Module 'acl_xattr' loaded
[2014/06/17 12:15:05.394862, 3] ../source3/smbd/vfs.c:139(vfs_init_custom)
Initialising custom vfs hooks from [dfs_samba4]
[2014/06/17 12:15:05.394922, 2] ../source3/modules/vfs_acl_xattr.c:193(connect_acl_xattr)
connect_acl_xattr: setting 'inherit acls = true' 'dos filemode = true' and 'force unknown acl user = true' for service IPC$
[2014/06/17 12:15:05.396943, 3] ../source3/smbd/service.c:856(make_connection_snum)
10.10.10.109 (ipv4:10.10.10.109:49530) connect to service IPC$ initially as user NT AUTHORITY\ANONYMOUS LOGON (uid=65534, gid=3000013) (pid 30193)
[2014/06/17 12:15:20.167361, 3] ../source3/smbd/service.c:1130(close_cnum)
10.10.10.109 (ipv4:10.10.10.109:49530) closed connection to service IPC$
[2014/06/17 12:15:20.168821, 3] ../source3/smbd/server_exit.c:221(exit_server_common)
Server exit (NT_STATUS_CONNECTION_RESET)
[2014/06/17 12:15:21.022356, 3] ../source3/lib/access.c:338(allow_access)
Allowed connection from 10.10.10.109 (10.10.10.109)
[2014/06/17 12:15:21.022521, 3] ../source3/smbd/oplock.c:870(init_oplocks)
init_oplocks: initializing messages.
[2014/06/17 12:15:21.022706, 3] ../source3/smbd/process.c:1802(process_smb)
Transaction 0 of length 159 (0 toread)
[2014/06/17 12:15:21.022755, 3] ../source3/smbd/process.c:1405(switch_message)
switch message SMBnegprot (pid 30194) conn 0x0
[2014/06/17 12:15:21.023411, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [PC NETWORK PROGRAM 1.0]
[2014/06/17 12:15:21.023453, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [LANMAN1.0]
[2014/06/17 12:15:21.023483, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [Windows for Workgroups 3.1a]
[2014/06/17 12:15:21.023513, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [LM1.2X002]
[2014/06/17 12:15:21.023545, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [LANMAN2.1]
[2014/06/17 12:15:21.023575, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [NT LM 0.12]
[2014/06/17 12:15:21.023603, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [SMB 2.002]
[2014/06/17 12:15:21.023632, 3] ../source3/smbd/negprot.c:563(reply_negprot)
Requested protocol [SMB 2.
]
[2014/06/17 12:15:21.023762, 3] ../source3/smbd/smb2_negprot.c:243(smbd_smb2_request_process_negprot)
Selected protocol SMB2_FF
[2014/06/17 12:15:21.024883, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'gssapi_spnego' registered
[2014/06/17 12:15:21.024924, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'gssapi_krb5' registered
[2014/06/17 12:15:21.024953, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'gssapi_krb5_sasl' registered
[2014/06/17 12:15:21.024981, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'schannel' registered
[2014/06/17 12:15:21.025009, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'spnego' registered
[2014/06/17 12:15:21.025038, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'ntlmssp' registered
[2014/06/17 12:15:21.025067, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'krb5' registered
[2014/06/17 12:15:21.025095, 3] ../auth/gensec/gensec_start.c:870(gensec_register)
GENSEC backend 'fake_gssapi_krb5' registered
[2014/06/17 12:15:21.026485, 3] ../lib/ldb-samba/ldb_wrap.c:320(ldb_wrap_connect)
ldb_wrap open of secrets.ldb
[2014/06/17 12:15:21.027425, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'sam' registered
[2014/06/17 12:15:21.027463, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'sam_ignoredomain' registered
[2014/06/17 12:15:21.027493, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'anonymous' registered
[2014/06/17 12:15:21.027523, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'winbind' registered
[2014/06/17 12:15:21.027550, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'winbind_wbclient' registered
[2014/06/17 12:15:21.027578, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'name_to_ntstatus' registered
[2014/06/17 12:15:21.027607, 3] ../source4/auth/ntlm/auth.c:673(auth_register)
AUTH backend 'unix' registered
[2014/06/17 12:15:21.032032, 3] ../source3/smbd/negprot.c:671(reply_negprot)
Selected protocol SMB 2.
[2014/06/17 12:15:21.032465, 3] ../source3/smbd/smb2_negprot.c:243(smbd_smb2_request_process_negprot)
Selected protocol SMB2_10
[2014/06/17 12:15:21.032894, 3] ../lib/ldb-samba/ldb_wrap.c:320(ldb_wrap_connect)
ldb_wrap open of secrets.ldb
[2014/06/17 12:15:21.039558, 3] ../lib/ldb-samba/ldb_wrap.c:320(ldb_wrap_connect)
ldb_wrap open of secrets.ldb
[2014/06/17 12:15:21.041466, 3] ../auth/ntlmssp/ntlmssp_util.c:34(debug_ntlmssp_flags)
Got NTLMSSP neg_flags=0xe2088297
[2014/06/17 12:15:21.042514, 3] ../auth/ntlmssp/ntlmssp_server.c:358(ntlmssp_server_preauth)
Got user=[dcadmin] domain=[lan.abc.com] workstation=[D820] len1=24 len2=266
[2014/06/17 12:15:21.042581, 3] ../source4/auth/ntlm/auth.c:270(auth_check_password_send)
auth_check_password_send: Checking password for unmapped user [lan.abc.com]\[dcadmin]@[D820]
auth_check_password_send: mapped user is: [LAN]\[dcadmin]@[D820]
[2014/06/17 12:15:21.044021, 3] ../source4/auth/ntlm/auth_sam.c:65(authsam_search_account)
authsam_search_account: Couldn't find user [dcadmin] in samdb, under DC=lan,DC=abc,DC=com
[2014/06/17 12:15:21.044419, 3] ../source4/auth/ntlm/auth_sam.c:99(authsam_search_account)
authsam_search_account: Account for guest user is disabled.
[2014/06/17 12:15:21.044461, 2] ../source4/auth/ntlm/auth.c:420(auth_check_password_recv)
auth_check_password_recv: sam_ignoredomain authentication for user [LAN\dcadmin] FAILED with error NT_STATUS_NO_SUCH_USER
[2014/06/17 12:15:21.044507, 2] ../auth/gensec/spnego.c:743(gensec_spnego_server_negTokenTarg)
SPNEGO login failed: NT_STATUS_NO_SUCH_USER
[2014/06/17 12:15:21.045477, 3] ../source3/smbd/server_exit.c:221(exit_server_common)
Server exit (NT_STATUS_CONNECTION_RESET)