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-<?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
-<refentry id="idmap_rid.8">
-
-<refmeta>
- <refentrytitle>idmap_rid</refentrytitle>
- <manvolnum>8</manvolnum>
- <refmiscinfo class="source">Samba</refmiscinfo>
- <refmiscinfo class="manual">System Administration tools</refmiscinfo>
- <refmiscinfo class="version">3.6</refmiscinfo>
-</refmeta>
-
-
-<refnamediv>
- <refname>idmap_rid</refname>
- <refpurpose>Samba's idmap_rid Backend for Winbind</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
- <title>DESCRIPTION</title>
- <para>The idmap_rid backend provides a way to use an algorithmic
- mapping scheme to map UIDs/GIDs and SIDs. No database is required
- in this case as the mapping is deterministic.</para>
-
- <para>
- Note that the idmap_rid module has changed considerably since Samba
- versions 3.0. and 3.2.
- Currently, there should to be an explicit idmap configuration for each
- domain that should use the idmap_rid backend, using disjoint ranges.
- One usually needs to define a writeable default idmap range, using
- a backend like <parameter>tdb</parameter> or <parameter>ldap</parameter>
- that can create unix ids, in order to be able to map the BUILTIN sids
- and other domains, and also in order to be able to create group mappings.
- See the example below.
- </para>
-
- <para>
- Note that the old syntax
- <parameter>idmap backend = rid:"DOM1=range DOM2=range2 ..."</parameter>
- is not supported any more since Samba version 3.0.25.
- </para>
-</refsynopsisdiv>
-
-<refsect1>
- <title>IDMAP OPTIONS</title>
-
- <variablelist>
- <varlistentry>
- <term>range = low - high</term>
- <listitem><para>
- Defines the available matching uid and gid range for which the
- backend is authoritative. Note that the range acts as a filter.
- If algorithmically determined UID or GID fall outside the
- range, they are ignored and the corresponding map is discarded.
- It is intended as a way to avoid accidental UID/GID overlaps
- between local and remotely defined IDs.
- </para></listitem>
- </varlistentry>
-
- <varlistentry>
- <term>base_rid = INTEGER</term>
- <listitem><para>
- Defines the base integer used to build SIDs out of a UID or a GID,
- and to rebase the UID or GID to be obtained from a SID.
- This means SIDs with a RID less than the base rid are filtered.
- The default is not to restrict the allowed rids at all,
- i.e. a base_rid value of 0.
- A good value for the base_rid can be 1000, since user
- RIDs by default start at 1000 (512 hexadecimal).
- </para>
- <para>
- Use of this parameter is deprecated.
- </para></listitem>
- </varlistentry>
- </variablelist>
-</refsect1>
-
-<refsect1>
- <title>THE MAPPING FORMULAS</title>
- <para>
- The Unix ID for a RID is calculated this way:
- <programlisting>
- ID = RID - BASE_RID + LOW_RANGE_ID.
- </programlisting>
- </para>
- <para>
- Correspondingly, the formula for calculating the RID for a
- given Unix ID is this:
- <programlisting>
- RID = ID + BASE_RID - LOW_RANGE_ID.
- </programlisting>
- </para>
-</refsect1>
-
-<refsect1>
- <title>EXAMPLES</title>
- <para>
- This example shows how to configure two domains with idmap_rid,
- the principal domain and a trusted domain, leaving the default
- id mapping scheme at tdb. The example also demonstrates the use
- of the base_rid parameter for the trusted domain.
- </para>
-
- <programlisting>
- [global]
- security = domain
- workgroup = MAIN
-
- idmap config * : backend = tdb
- idmap config * : range = 1000000-1999999
-
- idmap config MAIN : backend = rid
- idmap config MAIN : range = 10000 - 49999
-
- idmap config TRUSTED : backend = rid
- idmap config TRUSTED : range = 50000 - 99999
- idmap config TRUSTED : base_rid = 1000
- </programlisting>
-</refsect1>
-
-<refsect1>
- <title>AUTHOR</title>
-
- <para>
- The original Samba software and related utilities
- were created by Andrew Tridgell. Samba is now developed
- by the Samba Team as an Open Source project similar
- to the way the Linux kernel is developed.
- </para>
-</refsect1>
-
-</refentry>