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Official Samba-3 HOWTO and Reference Guide, The, Second Edition by Jelmer Vernooij, John H. Terpstra

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Chapter 13. Identity Mapping (IDMAP)

The Microsoft Windows operating system has a number of features that impose specific challenges to interoperability with the operating systems on which Samba is implemented. This chapter deals explicitly with the mechanisms Samba-3 (version 3.0.8 and later) uses to overcome one of the key challenges in the integration of Samba servers into an MS Windows networking environment. This chapter deals with identity mapping (IDMAP) of Windows security identifiers (SIDs) to UNIX UIDs and GIDs.

To ensure sufficient coverage, each possible Samba deployment type is discussed. This is followed by an overview of how the IDMAP facility may be implemented.

The IDMAP facility is of concern where more than one Samba server (or ...

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