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fcaeffde4e
BUG: https://bugzilla.samba.org/show_bug.cgi?id=9531 Signed-off-by: Karolin Seeger <kseeger@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Andreas Schneider <asn@samba.org> Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org> Autobuild-Date(master): Wed Dec 13 17:22:01 CET 2017 on sn-devel-144
126 lines
3.7 KiB
XML
126 lines
3.7 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
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<refentry id="idmap_rid.8">
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<refmeta>
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<refentrytitle>idmap_rid</refentrytitle>
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<manvolnum>8</manvolnum>
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<refmiscinfo class="source">Samba</refmiscinfo>
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<refmiscinfo class="manual">System Administration tools</refmiscinfo>
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<refmiscinfo class="version">&doc.version;</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>idmap_rid</refname>
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<refpurpose>Samba's idmap_rid Backend for Winbind</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<title>DESCRIPTION</title>
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<para>The idmap_rid backend provides a way to use an algorithmic
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mapping scheme to map UIDs/GIDs and SIDs. No database is required
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in this case as the mapping is deterministic.</para>
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<para>
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Currently, there should to be an explicit idmap configuration for each
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domain that should use the idmap_rid backend, using disjoint ranges.
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</para>
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<para>
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NOTE: The idmap_rid backend can NOT bet used as the default backend.
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One usually needs to define a writeable default idmap range, using
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a backend like <parameter>tdb</parameter> or <parameter>ldap</parameter>
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that can create unix ids, in order to be able to map the BUILTIN sids
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and other domains, and also in order to be able to create group mappings.
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See the example below.
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</para>
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</refsynopsisdiv>
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<refsect1>
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<title>IDMAP OPTIONS</title>
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<variablelist>
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<varlistentry>
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<term>range = low - high</term>
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<listitem><para>
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Defines the available matching uid and gid range for which the
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backend is authoritative. Note that the range acts as a filter.
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If algorithmically determined UID or GID fall outside the
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range, they are ignored and the corresponding map is discarded.
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It is intended as a way to avoid accidental UID/GID overlaps
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between local and remotely defined IDs.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>base_rid = INTEGER</term>
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<listitem><para>
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Defines the base integer used to build SIDs out of a UID or a GID,
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and to rebase the UID or GID to be obtained from a SID.
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This means SIDs with a RID less than the base rid are filtered.
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The default is not to restrict the allowed rids at all,
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i.e. a base_rid value of 0.
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</para>
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<para>
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Use of this parameter is deprecated.
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</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>THE MAPPING FORMULAS</title>
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<para>
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The Unix ID for a RID is calculated this way:
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<programlisting>
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ID = RID - BASE_RID + LOW_RANGE_ID.
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</programlisting>
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</para>
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<para>
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Correspondingly, the formula for calculating the RID for a
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given Unix ID is this:
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<programlisting>
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RID = ID + BASE_RID - LOW_RANGE_ID.
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</programlisting>
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</para>
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</refsect1>
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<refsect1>
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<title>EXAMPLES</title>
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<para>
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This example shows how to configure two domains with idmap_rid,
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the principal domain and a trusted domain, leaving the default
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id mapping scheme at tdb. The example also demonstrates the use
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of the base_rid parameter for the trusted domain.
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</para>
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<programlisting>
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[global]
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security = domain
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workgroup = MAIN
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idmap config * : backend = tdb
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idmap config * : range = 1000000-1999999
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idmap config MAIN : backend = rid
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idmap config MAIN : range = 10000 - 49999
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idmap config TRUSTED : backend = rid
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idmap config TRUSTED : range = 50000 - 99999
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</programlisting>
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</refsect1>
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<refsect1>
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<title>AUTHOR</title>
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<para>
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The original Samba software and related utilities
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were created by Andrew Tridgell. Samba is now developed
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by the Samba Team as an Open Source project similar
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to the way the Linux kernel is developed.
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</para>
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</refsect1>
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</refentry>
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