CIFS authentication failure when mounting DFS shares

Solution Unverified - Updated -


  • Error message "Permission denied" is returned when attempting to mount a DFS share from a Windows Active Directory domain:
# mount --verbose -t cifs // /mnt/my_mountpoint -o user=my_username,domain=MYDOMAIN,sec=ntlmi  

 mount.cifs kernel mount options: unc=//my_domain.comDFS_root,ip=,ver=1,rw,user=my_username,domain=MYDOMAIN,sec=ntlmi,prefixpath=dirA/dirB/dirC,pass=********  
 mount error 13 = Permission denied  
 Refer to the mount.cifs(8) manual page ( mount.cifs)
  • The CIFS kernel module complains about unexpected SMB signatures:
 Nov  7 13:54:32 <kern.err> my_hostname kernel:  CIFS VFS: Unexpected SMB signature  
 Nov  7 13:54:32 <kern.notice> my_hostname kernel: Status code returned 0xc000006d NT_STATUS_LOGON_FAILURE  
 Nov  7 13:54:32 <kern.err> my_hostname kernel:  CIFS VFS: Send error in SessSetup = -13  
 Nov  7 13:54:32 <kern.err> my_hostname kernel:  CIFS VFS: cifs_mount failed w/return code = -13


  • Red Hat Enterprise Linux 5
  • kernel version 2.6.18-274.12.1.el5
  • samba-client version 3.0.33-3.29.el5_6.2

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