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Q: How can I fix the “smb_pwd_check_ntlmv1: incorrect password length” errors I keep seeing in my logs?
People have reported different causes / solutions for this error. The most likely solutions are #1 & #2 but feel free to try the others.

  1. If you are using Windows 7 or Vista clients you might want to check your LAN Manager Authentication settings as in –dead link {[SOLVED] smb_pwd_check_ntlmv1: incorrect password length}. See also –dead link {SMB Errors When Copying Files [SOLVED] Windows 7}. Read Authentication Issues; Microsoft Article ID: 954387 for more details.
  2. If you are using Domain Authentication, the CIFS/SMB (Samba) auxiliary parameter use spnego = false has been reported to prevent this error. This may also work with other authentication methods.
  3. If you enabled LDAP or Active Directory services, turn them off and see if the errors go away.
  4. Some people have reported these errors occur when folders shared via UPnP have the wrong permissions. Turn off UPnP service and see if the errors go away.
  5. Check the CIFS/SMB setting of “Null Passwords” if it has a check mark remove it and see if that makes the errors go away.
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faq/0033.txt · Last modified: 2018/08/10 18:06 by zoon01