[Samba] S4 AD Domain Up; but lots of NTLMSSP NTLM2 errors

[Adam Tauno Williams]

samba-4.0.0 x86_64, CentOS6.3

My Samba4 / AD is up and running after migrating this weekend.  Testing
looked good and the domain *is working* but there are some issues.

My log.samba file is full of the following; I'm not certain of the
significance of these.

[2012/12/17 05:59:09,
0] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2012/12/17 06:35:30,
0] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2012/12/17 06:55:58,
0] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2012/12/17 06:59:10,
0] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2012/12/17 07:44:14,
0] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2012/12/17 07:58:31,
0] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2012/12/17 08:10:11,
0] ../source4/rpc_server/drsuapi/writespn.c:237(dcesrv_drsuapi_DsWriteAccountSpn)
  Failed to modify SPNs on CN=pc02541,OU=Industries
Workstations,DC=micore,DC=us: error in module acl: Constraint violation
(19)
[2012/12/17 08:26:00,
0] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2012/12/17 08:37:30,
0] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2012/12/17 08:41:42,
0] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2012/12/17 09:15:32,
0] ../source4/rpc_server/drsuapi/writespn.c:237(dcesrv_drsuapi_DsWriteAccountSpn)
  Failed to modify SPNs on CN=pc02541,OU=Industries
Workstations,DC=micore,DC=us: error in module acl: Constraint violation
(19)
[2012/12/17 09:24:47,
0] ../source4/rpc_server/drsuapi/writespn.c:237(dcesrv_drsuapi_DsWriteAccountSpn)
  Failed to modify SPNs on CN=chrisxpprovm,OU=Industries
Workstations,DC=micore,DC=us: error in module acl: Constraint violation
(19)
....

-- 
Adam Tauno Williams  GPG D95ED383
Systems Administrator, Python Developer, LPI / NCLA