autofs_ldap_auth.conf(5) — Linux manual page



NAME         top

       autofs_ldap_auth.conf - autofs LDAP authentication configuration

DESCRIPTION         top

       LDAP authenticated binds, TLS encrypted connections and
       certification may be used by setting appropriate values in the
       autofs authentication configuration file and configuring the LDAP
       client with appropriate settings.  The default location of this
       file is @mapdir@/autofs_ldap_auth.conf.  If this file exists it
       will be used to establish whether TLS or authentication should be

       An example of this file is:

         <?xml version="1.0" ?>

       If TLS encryption is to be used the location of the Certificate
       Authority certificate must be set within the LDAP client
       configuration in order to validate the server certificate. If, in
       addition, a certified connection is to be used then the client
       certificate and private key file locations must also be
       configured within the LDAP client.

OPTIONS         top

       This files contains a single XML element, as shown in the example
       above, with several attributes.

       The possible attributes are:

              Determines whether an encrypted connection to the ldap
              server should be attempted.

              This flag tells whether the ldap connection must be
              encrypted. If set to "yes", the automounter will fail to
              start if an encrypted connection cannot be established.

              This option tells whether an authenticated connection to
              the ldap server is required in order to perform ldap
              queries. If the flag is set to yes, only sasl
              authenticated connections will be allowed. If it is set to
              no then authentication is not needed for ldap server
              connections. If it is set to autodetect then the ldap
              server will be queried to establish a suitable sasl
              authentication mechanism. If no suitable mechanism can be
              found, connections to the ldap server are made without
              authentication. Finally, if it is set to simple, then
              simple authentication will be used instead of SASL.

              This attribute can be used to specify a preferred
              authentication mechanism.  In normal operations, the
              automounter will attempt to authenticate to the ldap
              server using the list of supportedSASLmechanisms obtained
              from the directory server.  Explicitly setting the
              authtype will bypass this selection and only try the
              mechanism specified. The EXTERNAL mechanism may be used to
              authenticate using a client certificate and requires that
              authrequired set to "yes" if using SSL or usetls,
              tlsrequired and authrequired all set to "yes" if using
              TLS, in addition to authtype being set to EXTERNAL.

              If using authtype EXTERNAL two additional configuration
              entries are required:

              external_cert="<client certificate path>"

              This specifies the path of the file containing the client

              external_key="<client certificate key path>"

              This specifies the path of the file containing the client
              certificate key.

              These two configuration entries are mandatory when using
              the EXTERNAL method as the HOME environment variable
              cannot be assumed to be set or, if it is, to be set to the
              location we expect.

              This attribute holds the authentication identity used by
              authentication mechanisms that require it.  Legal values
              for this attribute include any printable characters that
              can be used by the selected authentication mechanism.

              This attribute holds the secret used by authentication
              mechanisms that require it. Legal values for this
              attribute include any printable characters that can be
              used by the selected authentication mechanism.

       encoded_secret="<base64 encoded password>"
              This attribute holds the base64 encoded secret used by
              authentication mechanisms that require it. If this entry
              is present as well as the secret entry this value will
              take precedence.

       clientprinc="<GSSAPI client principal>"
              When using GSSAPI authentication, this attribute is
              consulted to determine the principal name to use when
              authenticating to the directory server. By default, this
              will be set to "autofsclient/<fqdn>@<REALM>.

       credentialcache="<external credential cache path>"
              When using GSSAPI authentication, this attribute can be
              used to specify an externally configured credential cache
              that is used during authentication.  By default, autofs
              will setup a memory based credential cache.

SEE ALSO         top

       auto.master(5), autofs.conf(5).

AUTHOR         top

       This manual page was written by Ian Kent <>.

COLOPHON         top

       This page is part of the autofs (automount) project.  Information
       about the project can be found at ⟨⟩.  If
       you have a bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨git://⟩ on
       2021-08-27.  (At that time, the date of the most recent commit
       that was found in the repository was 2021-07-07.)  If you
       discover any rendering problems in this HTML version of the page,
       or you believe there is a better or more up-to-date source for
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       information in this COLOPHON (which is not part of the original
       manual page), send a mail to

                               19 Feb 2010      AUTOFS_LDAP_AUTH.CONF(5)

Pages that refer to this page: autofs(5)autofs.conf(5)auto.master(5)autofs(8)automount(8)