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Diffstat (limited to 'docs-xml/smbdotconf/winbind/idmapconfig.xml')
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diff --git a/docs-xml/smbdotconf/winbind/idmapconfig.xml b/docs-xml/smbdotconf/winbind/idmapconfig.xml new file mode 100644 index 0000000..f70f11d --- /dev/null +++ b/docs-xml/smbdotconf/winbind/idmapconfig.xml @@ -0,0 +1,122 @@ +<samba:parameter name="idmap config DOMAIN : OPTION" + context="G" + type="string" + xmlns:samba="http://www.samba.org/samba/DTD/samba-doc"> +<description> + + <para> + ID mapping in Samba is the mapping between Windows SIDs and Unix user + and group IDs. This is performed by Winbindd with a configurable plugin + interface. Samba's ID mapping is configured by options starting with the + <smbconfoption name="idmap config"/> prefix. + An idmap option consists of the <smbconfoption name="idmap config"/> + prefix, followed by a domain name or the asterisk character (*), + a colon, and the name of an idmap setting for the chosen domain. + </para> + + <para> + The idmap configuration is hence divided into groups, one group + for each domain to be configured, and one group with the + asterisk instead of a proper domain name, which specifies the + default configuration that is used to catch all domains that do + not have an explicit idmap configuration of their own. + </para> + + <para> + There are three general options available: + </para> + + <variablelist> + <varlistentry> + <term>backend = backend_name</term> + <listitem><para> + This specifies the name of the idmap plugin to use as the + SID/uid/gid backend for this domain. The standard backends are + tdb + (<citerefentry><refentrytitle>idmap_tdb</refentrytitle> <manvolnum>8</manvolnum> </citerefentry>), + tdb2 + (<citerefentry><refentrytitle>idmap_tdb2</refentrytitle> <manvolnum>8</manvolnum></citerefentry>), + ldap + (<citerefentry><refentrytitle>idmap_ldap</refentrytitle> <manvolnum>8</manvolnum></citerefentry>), + rid + (<citerefentry><refentrytitle>idmap_rid</refentrytitle> <manvolnum>8</manvolnum></citerefentry>), + hash + (<citerefentry><refentrytitle>idmap_hash</refentrytitle> <manvolnum>8</manvolnum></citerefentry>), + autorid + (<citerefentry><refentrytitle>idmap_autorid</refentrytitle> <manvolnum>8</manvolnum></citerefentry>), + ad + (<citerefentry><refentrytitle>idmap_ad</refentrytitle> <manvolnum>8</manvolnum></citerefentry>) + and nss + (<citerefentry><refentrytitle>idmap_nss</refentrytitle> <manvolnum>8</manvolnum></citerefentry>). + The corresponding manual pages contain the details, but + here is a summary. + </para> + <para> + The first three of these create mappings of their own using + internal unixid counters and store the mappings in a database. + These are suitable for use in the default idmap configuration. + The rid and hash backends use a pure algorithmic calculation + to determine the unixid for a SID. The autorid module is a + mixture of the tdb and rid backend. It creates ranges for + each domain encountered and then uses the rid algorithm for each + of these automatically configured domains individually. + The ad backend uses unix ids stored in Active Directory via + the standard schema extensions. The nss backend reverses + the standard winbindd setup and gets the unix ids via names + from nsswitch which can be useful in an ldap setup. + </para></listitem> + </varlistentry> + + <varlistentry> + <term>range = low - high</term> + <listitem><para> + Defines the available matching uid and gid range for which the + backend is authoritative. For allocating backends, this also + defines the start and the end of the range for allocating + new unique IDs. + </para> + <para> + winbind uses this parameter to find the backend that is + authoritative for a unix ID to SID mapping, so it must be set + for each individually configured domain and for the default + configuration. The configured ranges must be mutually disjoint. + </para> + <para> + Note that the low value interacts with the <smbconfoption name="min domain uid"/> option! + </para></listitem> + </varlistentry> + + <varlistentry> + <term>read only = yes|no</term> + <listitem><para> + This option can be used to turn the writing backends + tdb, tdb2, and ldap into read only mode. This can be useful + e.g. in cases where a pre-filled database exists that should + not be extended automatically. + </para></listitem> + </varlistentry> + </variablelist> + + <para> + The following example illustrates how to configure the <citerefentry> + <refentrytitle>idmap_ad</refentrytitle> <manvolnum>8</manvolnum> + </citerefentry> backend for the CORP domain and the + <citerefentry><refentrytitle>idmap_tdb</refentrytitle> + <manvolnum>8</manvolnum></citerefentry> backend for all other + domains. This configuration assumes that the admin of CORP assigns + unix ids below 1000000 via the SFU extensions, and winbind is supposed + to use the next million entries for its own mappings from trusted + domains and for local groups for example. + </para> + + <programlisting> + idmap config * : backend = tdb + idmap config * : range = 1000000-1999999 + + idmap config CORP : backend = ad + idmap config CORP : range = 1000-999999 + </programlisting> + +</description> +<related>min domain uid</related> +</samba:parameter> |