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14.5.  Samba Account Information Databases


The latest release of Samba offers many new features including new password database backends not previously available. Samba version 3.0.0 fully supports all databases used in previous versions of Samba. However, although supported, many backends may not be suitable for production use.

14.5.1. Backward Compatible Backends

Plain Text
Plain text backends are nothing more than the /etc/passwd type backends. With a plain text backend, all usernames and passwords are sent unencrypted between the client and the Samba server. This method is very insecure and is not recommended for use by any means. It is possible that different Windows clients connecting to the Samba server with plain text passwords cannot support such an authentication method.
smbpasswd
A popular backend used in previous Samba packages, the smbpasswd backend utilizes a plain ASCII text layout that includes the MS Windows LanMan and NT account, and encrypted password information. The smbpasswd backend lacks the storage of the Windows NT/2000/2003 SAM extended controls. The smbpasswd backend is not recommended because it does not scale well or hold any Windows information, such as RIDs for NT-based groups. The tdbsam backend solves these issues for use in a smaller database (250 users), but is still not an enterprise-class solution.

Warning

This type of backend may be deprecated for future releases and replaced by the tdbsam backend, which does include the SAM extended controls.
ldapsam_compat
The ldapsam_compat backend allows continued OpenLDAP support for use with upgraded versions of Samba. This option is ideal for migration, but is not required. This tool will eventually be deprecated.
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