Novell LINUX ENTERPRISE DESKTOP 10 SP2 - DEPLOYMENT GUIDE 08-05-2008 Deployment Manual page 714

browseable = No
read only = No
create mask = 0640
Security Levels
To improve security, each share access can be protected with a password. SMB has
three possible ways of checking the permissions:
Share Level Security (security = share)
A password is firmly assigned to a share. Everyone who knows this password has
access to that share.
User Level Security (security = user)
This variation introduces the concept of the user to SMB. Each user must register
with the server with his own password. After registration, the server can grant access
to individual exported shares dependent on usernames.
Server Level Security (security = server):
To its clients, Samba pretends to be working in user level mode. However, it
passes all password queries to another user level mode server, which takes care of
authentication. This setting expects an additional parameter (password server).
The selection of share, user, or server level security applies to the entire server. It is
not possible to offer individual shares of a server configuration with share level security
698 Deployment Guide
This setting makes the share invisible in the network environment.
By default, Samba prohibits write access to any exported share by means of
the read only = Yes parameter. To make a share writable, set the value
read only = No, which is synonymous with writable = Yes.
Systems that are not based on MS Windows NT do not understand the concept
of UNIX permissions, so they cannot assign permissions when creating a file.
The parameter create mask defines the access permissions assigned to
newly created files. This only applies to writable shares. In effect, this setting
means the owner has read and write permissions and the members of the
owner's primary group have read permissions. valid users = %S prevents
read access even if the group has read permissions. For the group to have read
or write access, deactivate the line valid users = %S.