directory mode This parameter is the octal modes which are used when converting DOS modes to UNIX modes when creating UNIX directories. When a directory is created, the necessary permissions are calculated according to the mapping from DOS modes to UNIX permissions, and the resulting UNIX mode is then bit-wise 'AND'ed with this parameter. This parameter may be thought of as a bit-wise MASK for the UNIX modes of a directory. Any bit not set here will be removed from the modes set on a directory when it is created. The default value of this parameter removes the 'group' and 'other' write bits from the UNIX mode, allowing only the user who owns the directory to modify it. Following this Samba will bit-wise 'OR' the UNIX mode created from this parameter with the value of the parameter. This parameter is set to 000 by default (i.e. no extra mode bits are added). New in Samba 4.0.0. This mask is applied whenever permissions are changed on a directory. To allow clients full control over permission changes it should be set to 0777. force directory mode create mask inherit permissions 0755 0775