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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)

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 [AT] americas.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

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
If the "regex" translation method is specified, the following variables within the [REGEX] section are used to map between NFS4 names and local IDs.
User-Regex

Case-insensitive regular expression that extracts the local user name from an NFSv4 name. Multiple expressions may be concatenated with ’|’. The first match will be used. There is no default. A basic regular expression for domain DOMAIN.ORG and realm MY.DOMAIN.ORG would be:
^DOMAIN\([^@]+)@MY.DOMAIN.ORG$

Group-Regex

Case-insensitive regular expression that extracts the local group name from an NFSv4 name. Multiple expressions may be concatenated with ’|’. The first match will be used. There is no default. A basic regular expression for domain DOMAIN.ORG and realm MY.DOMAIN.ORG would be:
^([^@]+)@DOMAIN.ORG [AT] MY.ORG$|^DOMAIN\([^@]+)@MY.DOMAIN.ORG$

Prepend-Before-User

Constant string to put before a local user name when building an NFSv4 name. Usually this is the short domain name followed by ’´. (Default: none)

Append-After-User

Constant string to put after a local user name when building an NFSv4 name. Usually this is ’@’ followed by the default realm. (Default: none)

Prepend-Before-Group

Constant string to put before a local group name when building an NFSv4 name. Usually not used. (Default: none)

Append-After-Group

Constant string to put before a local group name when building an NFSv4 name. Usually this is ’@’ followed by the domain name followed by another ’@’ and the default realm. (Default: none)

Group-Name-Prefix

Constant string that is prepended to a local group name when converting it to an NFSv4 name. If an NFSv4 group name has this prefix it is removed when converting it to a local group name. With this group names of a central directory can be shortened for an isolated organizational unit if all groups have a common prefix. (Default: none)

Group-Name-No-Prefix-Regex

Case-insensitive regular expression to exclude groups from adding and removing the prefix set by Group-Name-Prefix. The regular expression must match both the remote and local group names. Multiple expressions may be concatenated with ’|’. (Default: none)

[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: GSSAuthName)

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 memberof 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,regex,nsswitch
GSS-Methods = umich_ldap,regex,static

[Static]

johndoe [AT] OTHER.ORG = johnny

[Regex]

User-Regex = ^DOMAIN\([^@]+)@DOMAIN.ORG$
Group-Regex = ^([^@]+)@DOMAIN.ORG [AT] DOMAIN.ORG$|^DOMAIN\([^@]+)@DOMAIN.ORG$
Prepend-Before-User = DOMAIN 
Append-After-User = @DOMAIN.ORG
Append-After-Group = @domain.org [AT] domain.org
Group-Name-Prefix = sales-
Group-Name-No-Prefix-Regex = -personal-group$

[UMICH_SCHEMA]

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

SEE ALSO

idmapd(8) svcgssd(8)

BUGS

Report bugs to <nfsv4 [AT] linux-nfs.org>