idmapd.conf(5) - phpMan

idmapd.conf(5) File Formats Manual idmapd.conf(5)

NAME
idmapd.conf - configuration file for libnfsidmap

SYNOPSIS
Configuration file for libnfsidmap. Used by idmapd and svcgssd to map NFSv4 name to and
from ids.

DESCRIPTION
The idmapd.conf configuration file consists of several sections, initiated by strings of
the form [General] and [Mapping]. Each section may contain lines of the form
variable = value
The recognized sections and their recognized variables are as follows:

[General] section variables
Verbosity
Verbosity level of debugging (Default: 0)

Domain The local NFSv4 domain name. An NFSv4 domain is a namespace with a unique user-
name<->UID and groupname<->GID mapping. (Default: Host's fully-qualified DNS do-
main name)

No-Strip
In multi-domain environments, some NFS servers will append the identity management
domain to the owner and owner_group in lieu of a true NFSv4 domain. This option
can facilitate lookups in such environments. If set to a value other than "none",
the nsswitch plugin will first pass the name to the password/group lookup function
without stripping the domain off. If that mapping fails then the plugin will try
again using the old method (comparing the domain in the string to the Domain value,
stripping it if it matches, and passing the resulting short name to the lookup
function). Valid values are "user", "group", "both", and "none". (Default:
"none")

Reformat-Group
Winbind has a quirk whereby doing a group lookup in UPN format (e.g. staff@ameri-
cas.example.com) will cause the group to be displayed prefixed with the full domain
in uppercase (e.g. AMERICAS.EXAMPLE.COM\staff) instead of in the familiar netbios
name format (e.g. AMERICAS\staff). Setting this option to true causes the name to
be reformatted before passing it to the group lookup function in order to work
around this. This setting is ignored unless No-Strip is set to either "both" or
"group". (Default: "false")

Local-Realms
A comma-separated list of Kerberos realm names that may be considered equivalent to
the local realm name. For example, users juser AT ORDER.EDU and juser AT MAIL.EDU
may be considered to be the same user in the specified Domain. (Default: the
host's default realm name)
Note: If a value is specified here, the default local realm must be included as
well.

[Mapping] section variables
Nobody-User
Local user name to be used when a mapping cannot be completed.

Nobody-Group
Local group name to be used when a mapping cannot be completed.

[Translation] section variables
Method A comma-separated, ordered list of mapping methods (plug-ins) to use when mapping
between NFSv4 names and local IDs. Each specified method is tried in order until a
mapping is found, or there are no more methods to try. The methods included in the
default distribution include "nsswitch", "umich_ldap", and "static". (Default:
nsswitch)

GSS-Methods
An optional comma-separated, ordered list of mapping methods (plug-ins) to use when
mapping between GSS Authenticated names and local IDs. (Default: the same list as
specified for Method)

[Static] section variables
The "static" translation method uses a static list of GSS-Authenticated names to local
user names. Entries in the list are of the form:
principal@REALM = localusername

[REGEX] section variables
In Ubuntu, the regex plugin is shipped in the libnfsidmap-regex package. If you want to
use this plugin, please install that package and consult the libnfsidmap-regex(5) manpage.

[UMICH_SCHEMA] section variables
If the "umich_ldap" translation method is specified, the following variables within the
[UMICH_SCHEMA] section are used.

LDAP_server
LDAP server name or address (Required if using UMICH_LDAP)

LDAP_base
Absolute LDAP search base. (Required if using UMICH_LDAP)

LDAP_people_base
Absolute LDAP search base for people accounts. (Default: The LDAP_base value)

LDAP_group_base
Absolute LDAP search base for group accounts. (Default: The LDAP_base value)

LDAP_canonicalize_name
Whether or not to perform name canonicalization on the name given as LDAP_server
(Default: "true")

LDAP_follow_referrals
Whether or not to follow ldap referrals. (Default: "true")

LDAP_use_ssl
Set to "true" to enable SSL communication with the LDAP server. (Default: "false")

LDAP_ca_cert
Location of a trusted CA certificate used when SSL is enabled (Required if
LDAP_use_ssl is true and LDAP_tls_reqcert is not set to never)

LDAP_tls_reqcert
Controls the LDAP server certificate validation behavior. It can take the same
values as ldap.conf(5)'s TLS_REQCERT tunable. (Default: "hard")

LDAP_timeout_seconds
Number of seconds before timing out an LDAP request (Default: 4)

LDAP_sasl_mech
SASL mechanism to be used for sasl authentication. Required if SASL auth is to be
used (Default: None)

LDAP_realm
SASL realm to be used for sasl authentication. (Default: None)

LDAP_sasl_authcid
Authentication identity to be used for sasl authentication. (Default: None)

LDAP_sasl_authzid
Authorization identity to be used for sasl authentication. (Default: None)

LDAP_sasl_secprops
Cyrus SASL security properties. It can the same values as ldap.conf(5)'s
sasl_secprops.

LDAP_sasl_canonicalize
Specifies whether the LDAP server hostname should be canonicalised. If set to yes
LDAP lib with do a reverse hostname lookup. If this is not set the LDAP library's
default will be used. (Default: None)

LDAP_sasl_krb5_ccname
Path to kerberos credential cache. If it is not set then the value of environment
variable KRB5CCNAME will be used. If the environment variable is not set then the
default mechanism of kerberos library will be used.

NFSv4_person_objectclass
The object class name for people accounts in your local LDAP schema (Default:
NFSv4RemotePerson)

NFSv4_name_attr
Your local schema's attribute name to be used for NFSv4 user names (Default:
NFSv4Name)

NFSv4_uid_attr
Your local schema's attribute name to be used for uidNumber (Default: uidNumber)

GSS_principal_attr
Your local schema's attribute name for GSSAPI Principal names (Default: GSSAuth-
Name)

NFSv4_acctname_attr
Your local schema's attribute name to be used for account names (Default: uid)

NFSv4_group_objectclass
The object class name for group accounts in your local LDAP schema (Default:
NFSv4RemoteGroup)

NFSv4_gid_attr
Your local schema's attribute name to be used for gidNumber (Default: gidNumber)

NFSv4_group_attr
Your local schema's attribute name to be used for NFSv4 group names (Default:
NFSv4Name)

LDAP_use_memberof_for_groups
Some LDAP servers do a better job with indexing where searching through all the
groups searching for the user in the memberuid list. Others like SunOne directory
that search can takes minutes if there are thousands of groups. So setting
LDAP_use_memberof_for_groups to true in the configuration file will use the mem-
berof lists of the account and search through only those groups to obtain gids.
(Default: false)

NFSv4_member_attr
If LDAP_use_memberof_for_groups is true, this is the attribute to be searched for.
(Default: memberUid)

NFSv4_grouplist_filter
An optional search filter for determining group membership. (No Default)

EXAMPLES
An example /etc/idmapd.conf file:

[General]

Verbosity = 0
Domain = domain.org
Local-Realms = DOMAIN.ORG,MY.DOMAIN.ORG,YOUR.DOMAIN.ORG

[Mapping]

Nobody-User = nfsnobody
Nobody-Group = nfsnobody

[Translation]

Method = umich_ldap,nsswitch
GSS-Methods = umich_ldap,static

[Static]

johndoe AT OTHER.ORG = johnny

[UMICH_SCHEMA]

LDAP_server = ldap.domain.org
LDAP_base = dc=org,dc=domain