This file is indexed.

/usr/share/heimdal-kdc/kdc.conf is in heimdal-kdc 1.7~git20150920+dfsg-4ubuntu1.

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The actual contents of the file can be viewed below.

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[logging]
# Specifies that entity should use the specified
# destination for logging.
#
# Format format destinations:
#
#   STDERR
#      This logs to the program's stderr.
#
#   FILE:/file
#   FILE=/file
#      Log to the specified file. The form using a colon appends to the file,
#      the form with an equal truncates the file. The truncating form keeps the
#      file open, while the appending form closes it after each log message
#      (which makes it possible to rotate logs). The truncating form is mainly
#      for compatibility with the MIT libkrb5.
#
#   DEVICE=/device
#      This logs to the specified device, at present this is the same as
#      FILE:/device.
#
#   CONSOLE
#      Log to the console, this is the same as DEVICE=/dev/console.

#   SYSLOG[:priority[:facility]]
#      Send messages to the syslog system, using priority, and facility. To get
#      the name for one of these, you take the name of the macro passed to
#      syslog(3), and remove the leading LOG_ (LOG_NOTICE becomes NOTICE).  The
#      default values (as well as the values used for unrecognised values), are ERR,
#      and AUTH, respectively.  See syslog(3) for a list of priorities and
#      facilities.
#
# Each destination may optionally be prepended with a range of logging levels,
# specified as min-max/. Either of the min and max valued may be omitted, in
# this case min is assumed to be zero, and max is assumed to be infinity.  If
# you don't include a dash, both min and max gets set to the specified value.
# If no range is specified, all messages gets logged.
#
kdc = FILE:/var/log/heimdal-kdc.log
# kdc = SYSLOG:INFO

[kdc]

# database = {
#
#  dbname = DATABASENAME
#       Use this database for this realm.  See
#       the info documetation how to configure
#       diffrent database backends.
#
#  realm = REALM
#       Specifies the realm that will be stored
#       in this database.  It realm isn't set,
#       it will used as the default database,
#       there can only be one entry that doesn't
#       have a realm stanza.
#
#  mkey_file = FILENAME
#       Use this keytab file for the master key
#       of this database.  If not specified
#       DATABASENAME.mkey will be used.
#
#  acl_file = PA FILENAME
#       Use this file for the ACL list of this
#       database.
#
#  log_file = FILENAME
#       Use this file as the log of changes per-
#       formed to the database.  This file is
#       used by ipropd-master for propagating
#       changes to slaves.
#
# }

database = {
  dbname = /var/lib/heimdal-kdc/heimdal
  acl_file = /etc/heimdal-kdc/kadmind.acl
}

# Maximum size of a kdc request.
#
# max-request = SIZE

# If set pre-authentication is required.  Since krb4
# requests are not pre-authenticated they will be
# rejected.
#
# require-preauth = BOOL

# List of ports the kdc should listen to.
#
# ports = list of ports

# List of addresses the kdc should bind to.
#
# addresses = list of interfaces

# Should the kdc answer kdc-requests over http.
#
# enable-http = BOOL

# If this kdc should emulate the AFS kaserver.
#
# enable-kaserver = BOOL

# Verify the addresses in the tickets used in tgs
# requests.
#
# check-ticket-addresses = BOOL

# Allow address-less tickets.
#
# allow-null-ticket-addresses = BOOL

# If the kdc is allowed to hand out anonymous tick-
# ets.
#
# allow-anonymous = BOOL

# Encode as-rep as tgs-rep tobe compatible with mis-
# takes older DCE secd did.
# encode_as_rep_as_tgs_rep = BOOL

# The time before expiration that the user should be
# warned that her password is about to expire.
#
# kdc_warn_pwexpire = TIME

# What type of logging the kdc should use, see also
# [logging]/kdc.
#
# logging = Logging

# use_2b = {
#
#  principal = BOOL
#       boolean value if the 524 daemon should
#       return AFS 2b tokens for principal.
#
#  ...
#
# }

# If the LDAP backend is used for storing principals,
# this is the structural object that will be used
# when creating and when reading objects.  The
# default value is account .
#
# hdb-ldap-structural-object structural object

# is the dn that will be appended to the principal
# when creating entries.  Default value is the search
# dn.
#
# hdb-ldap-create-base creation dn

[kadmin]

# If pre-authentication is required to talk to the
# kadmin server.
#
# require-preauth = BOOL

# If a principal already have its password set for
# expiration, this is the time it will be valid for
# after a change.
#
# password_lifetime = time

# For each entry in default_keys try to parse it as a
# sequence of etype:salttype:salt syntax of this if
# something like:
#
# [(des|des3|etype):](pw-salt|afs3-salt)[:string]
#
# If etype is omitted it means everything, and if
# string is omitted it means the default salt string
# (for that principal and encryption type).  Addi-
# tional special values of keytypes are:
#
#  v5   The Kerberos 5 salt pw-salt
#
#  v4   The Kerberos 4 salt des:pw-salt:
#
# default_keys = keytypes...

# When true, this is the same as
# 
# default_keys = des3:pw-salt v4
# 
# and is only left for backwards compatibility.
# use_v4_salt = BOOL

[password_quality]
# Check the Password quality assurance in the info documentation
# for more information.

# Library name that contains the password check_func-
# tion
#
# check_library = library-name

# Function name for checking passwords in
# check_library
#
# check_function = function-name

# List of libraries that can do password policy
# checks
#
# policy_libraries = library1 ... libraryN

# List of policy names to apply to the password.
# Builtin policies are among other minimum-length,
# character-class, external-check.
#
# policies = policy1 ... policyN