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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>kdc.conf — MIT Kerberos Documentation</title> <link rel="stylesheet" href="../../_static/agogo.css" type="text/css" /> <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" /> <link rel="stylesheet" href="../../_static/kerb.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../../', VERSION: '1.15.1', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../../_static/jquery.js"></script> <script type="text/javascript" src="../../_static/underscore.js"></script> <script type="text/javascript" src="../../_static/doctools.js"></script> <link rel="author" title="About these documents" href="../../about.html" /> <link rel="copyright" title="Copyright" href="../../copyright.html" /> <link rel="top" title="MIT Kerberos Documentation" href="../../index.html" /> <link rel="up" title="Configuration Files" href="index.html" /> <link rel="next" title="kadm5.acl" href="kadm5_acl.html" /> <link rel="prev" title="krb5.conf" href="krb5_conf.html" /> </head> <body> <div class="header-wrapper"> <div class="header"> <h1><a href="../../index.html">MIT Kerberos Documentation</a></h1> <div class="rel"> <a href="../../index.html" title="Full Table of Contents" accesskey="C">Contents</a> | <a href="krb5_conf.html" title="krb5.conf" accesskey="P">previous</a> | <a href="kadm5_acl.html" title="kadm5.acl" accesskey="N">next</a> | <a href="../../genindex.html" title="General Index" accesskey="I">index</a> | <a href="../../search.html" title="Enter search criteria" accesskey="S">Search</a> | <a href="mailto:krb5-bugs@mit.edu?subject=Documentation__kdc.conf">feedback</a> </div> </div> </div> <div class="content-wrapper"> <div class="content"> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body"> <div class="section" id="kdc-conf"> <span id="kdc-conf-5"></span><h1>kdc.conf<a class="headerlink" href="#kdc-conf" title="Permalink to this headline">¶</a></h1> <p>The kdc.conf file supplements <a class="reference internal" href="krb5_conf.html#krb5-conf-5"><em>krb5.conf</em></a> for programs which are typically only used on a KDC, such as the <a class="reference internal" href="../admin_commands/krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a> and <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> daemons and the <a class="reference internal" href="../admin_commands/kdb5_util.html#kdb5-util-8"><em>kdb5_util</em></a> program. Relations documented here may also be specified in krb5.conf; for the KDC programs mentioned, krb5.conf and kdc.conf will be merged into a single configuration profile.</p> <p>Normally, the kdc.conf file is found in the KDC state directory, <tt class="docutils literal"><span class="pre">/var/kerberos</span></tt><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt>. You can override the default location by setting the environment variable <strong>KRB5_KDC_PROFILE</strong>.</p> <p>Please note that you need to restart the KDC daemon for any configuration changes to take effect.</p> <div class="section" id="structure"> <h2>Structure<a class="headerlink" href="#structure" title="Permalink to this headline">¶</a></h2> <p>The kdc.conf file is set up in the same format as the <a class="reference internal" href="krb5_conf.html#krb5-conf-5"><em>krb5.conf</em></a> file.</p> </div> <div class="section" id="sections"> <h2>Sections<a class="headerlink" href="#sections" title="Permalink to this headline">¶</a></h2> <p>The kdc.conf file may contain the following sections:</p> <table border="1" class="docutils"> <colgroup> <col width="29%" /> <col width="71%" /> </colgroup> <tbody valign="top"> <tr class="row-odd"><td><a class="reference internal" href="#kdcdefaults"><em>[kdcdefaults]</em></a></td> <td>Default values for KDC behavior</td> </tr> <tr class="row-even"><td><a class="reference internal" href="#kdc-realms"><em>[realms]</em></a></td> <td>Realm-specific database configuration and settings</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="#dbdefaults"><em>[dbdefaults]</em></a></td> <td>Default database settings</td> </tr> <tr class="row-even"><td><a class="reference internal" href="#dbmodules"><em>[dbmodules]</em></a></td> <td>Per-database settings</td> </tr> <tr class="row-odd"><td><a class="reference internal" href="#logging"><em>[logging]</em></a></td> <td>Controls how Kerberos daemons perform logging</td> </tr> </tbody> </table> <div class="section" id="kdcdefaults"> <span id="id1"></span><h3>[kdcdefaults]<a class="headerlink" href="#kdcdefaults" title="Permalink to this headline">¶</a></h3> <p>With two exceptions, relations in the [kdcdefaults] section specify default values for realm variables, to be used if the [realms] subsection does not contain a relation for the tag. See the <a class="reference internal" href="#kdc-realms"><em>[realms]</em></a> section for the definitions of these relations.</p> <ul class="simple"> <li><strong>host_based_services</strong></li> <li><strong>kdc_listen</strong></li> <li><strong>kdc_ports</strong></li> <li><strong>kdc_tcp_listen</strong></li> <li><strong>kdc_tcp_ports</strong></li> <li><strong>no_host_referral</strong></li> <li><strong>restrict_anonymous_to_tgt</strong></li> </ul> <dl class="docutils"> <dt><strong>kdc_max_dgram_reply_size</strong></dt> <dd>Specifies the maximum packet size that can be sent over UDP. The default value is 4096 bytes.</dd> <dt><strong>kdc_tcp_listen_backlog</strong></dt> <dd>(Integer.) Set the size of the listen queue length for the KDC daemon. The value may be limited by OS settings. The default value is 5.</dd> </dl> </div> <div class="section" id="realms"> <span id="kdc-realms"></span><h3>[realms]<a class="headerlink" href="#realms" title="Permalink to this headline">¶</a></h3> <p>Each tag in the [realms] section is the name of a Kerberos realm. The value of the tag is a subsection where the relations define KDC parameters for that particular realm. The following example shows how to define one parameter for the ATHENA.MIT.EDU realm:</p> <div class="highlight-python"><pre>[realms] ATHENA.MIT.EDU = { max_renewable_life = 7d 0h 0m 0s }</pre> </div> <p>The following tags may be specified in a [realms] subsection:</p> <dl class="docutils"> <dt><strong>acl_file</strong></dt> <dd>(String.) Location of the access control list file that <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> uses to determine which principals are allowed which permissions on the Kerberos database. The default value is <tt class="docutils literal"><span class="pre">/var/kerberos</span></tt><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt><tt class="docutils literal"><span class="pre">/kadm5.acl</span></tt>. For more information on Kerberos ACL file see <a class="reference internal" href="kadm5_acl.html#kadm5-acl-5"><em>kadm5.acl</em></a>.</dd> <dt><strong>database_module</strong></dt> <dd>(String.) This relation indicates the name of the configuration section under <a class="reference internal" href="#dbmodules"><em>[dbmodules]</em></a> for database-specific parameters used by the loadable database library. The default value is the realm name. If this configuration section does not exist, default values will be used for all database parameters.</dd> <dt><strong>database_name</strong></dt> <dd>(String, deprecated.) This relation specifies the location of the Kerberos database for this realm, if the DB2 module is being used and the <a class="reference internal" href="#dbmodules"><em>[dbmodules]</em></a> configuration section does not specify a database name. The default value is <tt class="docutils literal"><span class="pre">/var/kerberos</span></tt><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt><tt class="docutils literal"><span class="pre">/principal</span></tt>.</dd> <dt><strong>default_principal_expiration</strong></dt> <dd>(<a class="reference internal" href="../../basic/date_format.html#abstime"><em>Absolute time</em></a> string.) Specifies the default expiration date of principals created in this realm. The default value is 0, which means no expiration date.</dd> <dt><strong>default_principal_flags</strong></dt> <dd><p class="first">(Flag string.) Specifies the default attributes of principals created in this realm. The format for this string is a comma-separated list of flags, with ‘+’ before each flag that should be enabled and ‘-‘ before each flag that should be disabled. The <strong>postdateable</strong>, <strong>forwardable</strong>, <strong>tgt-based</strong>, <strong>renewable</strong>, <strong>proxiable</strong>, <strong>dup-skey</strong>, <strong>allow-tickets</strong>, and <strong>service</strong> flags default to enabled.</p> <p>There are a number of possible flags:</p> <dl class="last docutils"> <dt><strong>allow-tickets</strong></dt> <dd>Enabling this flag means that the KDC will issue tickets for this principal. Disabling this flag essentially deactivates the principal within this realm.</dd> <dt><strong>dup-skey</strong></dt> <dd>Enabling this flag allows the principal to obtain a session key for another user, permitting user-to-user authentication for this principal.</dd> <dt><strong>forwardable</strong></dt> <dd>Enabling this flag allows the principal to obtain forwardable tickets.</dd> <dt><strong>hwauth</strong></dt> <dd>If this flag is enabled, then the principal is required to preauthenticate using a hardware device before receiving any tickets.</dd> <dt><strong>no-auth-data-required</strong></dt> <dd>Enabling this flag prevents PAC or AD-SIGNEDPATH data from being added to service tickets for the principal.</dd> <dt><strong>ok-as-delegate</strong></dt> <dd>If this flag is enabled, it hints the client that credentials can and should be delegated when authenticating to the service.</dd> <dt><strong>ok-to-auth-as-delegate</strong></dt> <dd>Enabling this flag allows the principal to use S4USelf tickets.</dd> <dt><strong>postdateable</strong></dt> <dd>Enabling this flag allows the principal to obtain postdateable tickets.</dd> <dt><strong>preauth</strong></dt> <dd>If this flag is enabled on a client principal, then that principal is required to preauthenticate to the KDC before receiving any tickets. On a service principal, enabling this flag means that service tickets for this principal will only be issued to clients with a TGT that has the preauthenticated bit set.</dd> <dt><strong>proxiable</strong></dt> <dd>Enabling this flag allows the principal to obtain proxy tickets.</dd> <dt><strong>pwchange</strong></dt> <dd>Enabling this flag forces a password change for this principal.</dd> <dt><strong>pwservice</strong></dt> <dd>If this flag is enabled, it marks this principal as a password change service. This should only be used in special cases, for example, if a user’s password has expired, then the user has to get tickets for that principal without going through the normal password authentication in order to be able to change the password.</dd> <dt><strong>renewable</strong></dt> <dd>Enabling this flag allows the principal to obtain renewable tickets.</dd> <dt><strong>service</strong></dt> <dd>Enabling this flag allows the the KDC to issue service tickets for this principal.</dd> <dt><strong>tgt-based</strong></dt> <dd>Enabling this flag allows a principal to obtain tickets based on a ticket-granting-ticket, rather than repeating the authentication process that was used to obtain the TGT.</dd> </dl> </dd> <dt><strong>dict_file</strong></dt> <dd>(String.) Location of the dictionary file containing strings that are not allowed as passwords. The file should contain one string per line, with no additional whitespace. If none is specified or if there is no policy assigned to the principal, no dictionary checks of passwords will be performed.</dd> <dt><strong>host_based_services</strong></dt> <dd>(Whitespace- or comma-separated list.) Lists services which will get host-based referral processing even if the server principal is not marked as host-based by the client.</dd> <dt><strong>iprop_enable</strong></dt> <dd>(Boolean value.) Specifies whether incremental database propagation is enabled. The default value is false.</dd> <dt><strong>iprop_master_ulogsize</strong></dt> <dd>(Integer.) Specifies the maximum number of log entries to be retained for incremental propagation. The default value is 1000. Prior to release 1.11, the maximum value was 2500.</dd> <dt><strong>iprop_slave_poll</strong></dt> <dd>(Delta time string.) Specifies how often the slave KDC polls for new updates from the master. The default value is <tt class="docutils literal"><span class="pre">2m</span></tt> (that is, two minutes).</dd> <dt><strong>iprop_listen</strong></dt> <dd>(Whitespace- or comma-separated list.) Specifies the iprop RPC listening addresses and/or ports for the <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> daemon. Each entry may be an interface address, a port number, or an address and port number separated by a colon. If the address contains colons, enclose it in square brackets. If no address is specified, the wildcard address is used. If kadmind fails to bind to any of the specified addresses, it will fail to start. The default (when <strong>iprop_enable</strong> is true) is to bind to the wildcard address at the port specified in <strong>iprop_port</strong>. New in release 1.15.</dd> <dt><strong>iprop_port</strong></dt> <dd>(Port number.) Specifies the port number to be used for incremental propagation. When <strong>iprop_enable</strong> is true, this relation is required in the slave configuration file, and this relation or <strong>iprop_listen</strong> is required in the master configuration file, as there is no default port number. Port numbers specified in <strong>iprop_listen</strong> entries will override this port number for the <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> daemon.</dd> <dt><strong>iprop_resync_timeout</strong></dt> <dd>(Delta time string.) Specifies the amount of time to wait for a full propagation to complete. This is optional in configuration files, and is used by slave KDCs only. The default value is 5 minutes (<tt class="docutils literal"><span class="pre">5m</span></tt>). New in release 1.11.</dd> <dt><strong>iprop_logfile</strong></dt> <dd>(File name.) Specifies where the update log file for the realm database is to be stored. The default is to use the <strong>database_name</strong> entry from the realms section of the krb5 config file, with <tt class="docutils literal"><span class="pre">.ulog</span></tt> appended. (NOTE: If <strong>database_name</strong> isn’t specified in the realms section, perhaps because the LDAP database back end is being used, or the file name is specified in the [dbmodules] section, then the hard-coded default for <strong>database_name</strong> is used. Determination of the <strong>iprop_logfile</strong> default value will not use values from the [dbmodules] section.)</dd> <dt><strong>kadmind_listen</strong></dt> <dd>(Whitespace- or comma-separated list.) Specifies the kadmin RPC listening addresses and/or ports for the <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> daemon. Each entry may be an interface address, a port number, or an address and port number separated by a colon. If the address contains colons, enclose it in square brackets. If no address is specified, the wildcard address is used. If kadmind fails to bind to any of the specified addresses, it will fail to start. The default is to bind to the wildcard address at the port specified in <strong>kadmind_port</strong>, or the standard kadmin port (749). New in release 1.15.</dd> <dt><strong>kadmind_port</strong></dt> <dd>(Port number.) Specifies the port on which the <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> daemon is to listen for this realm. Port numbers specified in <strong>kadmind_listen</strong> entries will override this port number. The assigned port for kadmind is 749, which is used by default.</dd> <dt><strong>key_stash_file</strong></dt> <dd>(String.) Specifies the location where the master key has been stored (via kdb5_util stash). The default is <tt class="docutils literal"><span class="pre">/var/kerberos</span></tt><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt><tt class="docutils literal"><span class="pre">/.k5.REALM</span></tt>, where <em>REALM</em> is the Kerberos realm.</dd> <dt><strong>kdc_listen</strong></dt> <dd>(Whitespace- or comma-separated list.) Specifies the UDP listening addresses and/or ports for the <a class="reference internal" href="../admin_commands/krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a> daemon. Each entry may be an interface address, a port number, or an address and port number separated by a colon. If the address contains colons, enclose it in square brackets. If no address is specified, the wildcard address is used. If no port is specified, the standard port (88) is used. If the KDC daemon fails to bind to any of the specified addresses, it will fail to start. The default is to bind to the wildcard address on the standard port. New in release 1.15.</dd> <dt><strong>kdc_ports</strong></dt> <dd>(Whitespace- or comma-separated list, deprecated.) Prior to release 1.15, this relation lists the ports for the <a class="reference internal" href="../admin_commands/krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a> daemon to listen on for UDP requests. In release 1.15 and later, it has the same meaning as <strong>kdc_listen</strong> if that relation is not defined.</dd> <dt><strong>kdc_tcp_listen</strong></dt> <dd>(Whitespace- or comma-separated list.) Specifies the TCP listening addresses and/or ports for the <a class="reference internal" href="../admin_commands/krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a> daemon. Each entry may be an interface address, a port number, or an address and port number separated by a colon. If the address contains colons, enclose it in square brackets. If no address is specified, the wildcard address is used. If no port is specified, the standard port (88) is used. To disable listening on TCP, set this relation to the empty string with <tt class="docutils literal"><span class="pre">kdc_tcp_listen</span> <span class="pre">=</span> <span class="pre">""</span></tt>. If the KDC daemon fails to bind to any of the specified addresses, it will fail to start. The default is to bind to the wildcard address on the standard port. New in release 1.15.</dd> <dt><strong>kdc_tcp_ports</strong></dt> <dd>(Whitespace- or comma-separated list, deprecated.) Prior to release 1.15, this relation lists the ports for the <a class="reference internal" href="../admin_commands/krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a> daemon to listen on for UDP requests. In release 1.15 and later, it has the same meaning as <strong>kdc_tcp_listen</strong> if that relation is not defined.</dd> <dt><strong>kpasswd_listen</strong></dt> <dd>(Comma-separated list.) Specifies the kpasswd listening addresses and/or ports for the <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> daemon. Each entry may be an interface address, a port number, or an address and port number separated by a colon. If the address contains colons, enclose it in square brackets. If no address is specified, the wildcard address is used. If kadmind fails to bind to any of the specified addresses, it will fail to start. The default is to bind to the wildcard address at the port specified in <strong>kpasswd_port</strong>, or the standard kpasswd port (464). New in release 1.15.</dd> <dt><strong>kpasswd_port</strong></dt> <dd>(Port number.) Specifies the port on which the <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> daemon is to listen for password change requests for this realm. Port numbers specified in <strong>kpasswd_listen</strong> entries will override this port number. The assigned port for password change requests is 464, which is used by default.</dd> <dt><strong>master_key_name</strong></dt> <dd>(String.) Specifies the name of the principal associated with the master key. The default is <tt class="docutils literal"><span class="pre">K/M</span></tt>.</dd> <dt><strong>master_key_type</strong></dt> <dd>(Key type string.) Specifies the master key’s key type. The default value for this is <tt class="docutils literal"><span class="pre">aes256-cts-hmac-sha1-96</span></tt>. For a list of all possible values, see <a class="reference internal" href="#encryption-types"><em>Encryption types</em></a>.</dd> <dt><strong>max_life</strong></dt> <dd>(<a class="reference internal" href="../../basic/date_format.html#duration"><em>Time duration</em></a> string.) Specifies the maximum time period for which a ticket may be valid in this realm. The default value is 24 hours.</dd> <dt><strong>max_renewable_life</strong></dt> <dd>(<a class="reference internal" href="../../basic/date_format.html#duration"><em>Time duration</em></a> string.) Specifies the maximum time period during which a valid ticket may be renewed in this realm. The default value is 0.</dd> <dt><strong>no_host_referral</strong></dt> <dd>(Whitespace- or comma-separated list.) Lists services to block from getting host-based referral processing, even if the client marks the server principal as host-based or the service is also listed in <strong>host_based_services</strong>. <tt class="docutils literal"><span class="pre">no_host_referral</span> <span class="pre">=</span> <span class="pre">*</span></tt> will disable referral processing altogether.</dd> <dt><strong>des_crc_session_supported</strong></dt> <dd>(Boolean value). If set to true, the KDC will assume that service principals support des-cbc-crc for session key enctype negotiation purposes. If <strong>allow_weak_crypto</strong> in <a class="reference internal" href="krb5_conf.html#libdefaults"><em>[libdefaults]</em></a> is false, or if des-cbc-crc is not a permitted enctype, then this variable has no effect. Defaults to true. New in release 1.11.</dd> <dt><strong>reject_bad_transit</strong></dt> <dd><p class="first">(Boolean value.) If set to true, the KDC will check the list of transited realms for cross-realm tickets against the transit path computed from the realm names and the capaths section of its <a class="reference internal" href="krb5_conf.html#krb5-conf-5"><em>krb5.conf</em></a> file; if the path in the ticket to be issued contains any realms not in the computed path, the ticket will not be issued, and an error will be returned to the client instead. If this value is set to false, such tickets will be issued anyways, and it will be left up to the application server to validate the realm transit path.</p> <p>If the disable-transited-check flag is set in the incoming request, this check is not performed at all. Having the <strong>reject_bad_transit</strong> option will cause such ticket requests to be rejected always.</p> <p>This transit path checking and config file option currently apply only to TGS requests.</p> <p class="last">The default value is true.</p> </dd> <dt><strong>restrict_anonymous_to_tgt</strong></dt> <dd>(Boolean value.) If set to true, the KDC will reject ticket requests from anonymous principals to service principals other than the realm’s ticket-granting service. This option allows anonymous PKINIT to be enabled for use as FAST armor tickets without allowing anonymous authentication to services. The default value is false. New in release 1.9.</dd> <dt><strong>supported_enctypes</strong></dt> <dd>(List of <em>key</em>:<em>salt</em> strings.) Specifies the default key/salt combinations of principals for this realm. Any principals created through <a class="reference internal" href="../admin_commands/kadmin_local.html#kadmin-1"><em>kadmin</em></a> will have keys of these types. The default value for this tag is <tt class="docutils literal"><span class="pre">aes256-cts-hmac-sha1-96:normal</span> <span class="pre">aes128-cts-hmac-sha1-96:normal</span> <span class="pre">des3-cbc-sha1:normal</span> <span class="pre">arcfour-hmac-md5:normal</span></tt>. For lists of possible values, see <a class="reference internal" href="#keysalt-lists"><em>Keysalt lists</em></a>.</dd> </dl> </div> <div class="section" id="dbdefaults"> <span id="id2"></span><h3>[dbdefaults]<a class="headerlink" href="#dbdefaults" title="Permalink to this headline">¶</a></h3> <p>The [dbdefaults] section specifies default values for some database parameters, to be used if the [dbmodules] subsection does not contain a relation for the tag. See the <a class="reference internal" href="#dbmodules"><em>[dbmodules]</em></a> section for the definitions of these relations.</p> <ul class="simple"> <li><strong>ldap_kerberos_container_dn</strong></li> <li><strong>ldap_kdc_dn</strong></li> <li><strong>ldap_kdc_sasl_authcid</strong></li> <li><strong>ldap_kdc_sasl_authzid</strong></li> <li><strong>ldap_kdc_sasl_mech</strong></li> <li><strong>ldap_kdc_sasl_realm</strong></li> <li><strong>ldap_kadmind_dn</strong></li> <li><strong>ldap_kadmind_sasl_authcid</strong></li> <li><strong>ldap_kadmind_sasl_authzid</strong></li> <li><strong>ldap_kadmind_sasl_mech</strong></li> <li><strong>ldap_kadmind_sasl_realm</strong></li> <li><strong>ldap_service_password_file</strong></li> <li><strong>ldap_servers</strong></li> <li><strong>ldap_conns_per_server</strong></li> </ul> </div> <div class="section" id="dbmodules"> <span id="id3"></span><h3>[dbmodules]<a class="headerlink" href="#dbmodules" title="Permalink to this headline">¶</a></h3> <p>The [dbmodules] section contains parameters used by the KDC database library and database modules. Each tag in the [dbmodules] section is the name of a Kerberos realm or a section name specified by a realm’s <strong>database_module</strong> parameter. The following example shows how to define one database parameter for the ATHENA.MIT.EDU realm:</p> <div class="highlight-python"><pre>[dbmodules] ATHENA.MIT.EDU = { disable_last_success = true }</pre> </div> <p>The following tags may be specified in a [dbmodules] subsection:</p> <dl class="docutils"> <dt><strong>database_name</strong></dt> <dd>This DB2-specific tag indicates the location of the database in the filesystem. The default is <tt class="docutils literal"><span class="pre">/var/kerberos</span></tt><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt><tt class="docutils literal"><span class="pre">/principal</span></tt>.</dd> <dt><strong>db_library</strong></dt> <dd>This tag indicates the name of the loadable database module. The value should be <tt class="docutils literal"><span class="pre">db2</span></tt> for the DB2 module and <tt class="docutils literal"><span class="pre">kldap</span></tt> for the LDAP module.</dd> <dt><strong>disable_last_success</strong></dt> <dd>If set to <tt class="docutils literal"><span class="pre">true</span></tt>, suppresses KDC updates to the “Last successful authentication” field of principal entries requiring preauthentication. Setting this flag may improve performance. (Principal entries which do not require preauthentication never update the “Last successful authentication” field.). First introduced in release 1.9.</dd> <dt><strong>disable_lockout</strong></dt> <dd>If set to <tt class="docutils literal"><span class="pre">true</span></tt>, suppresses KDC updates to the “Last failed authentication” and “Failed password attempts” fields of principal entries requiring preauthentication. Setting this flag may improve performance, but also disables account lockout. First introduced in release 1.9.</dd> <dt><strong>ldap_conns_per_server</strong></dt> <dd>This LDAP-specific tag indicates the number of connections to be maintained per LDAP server.</dd> <dt><strong>ldap_kdc_dn</strong> and <strong>ldap_kadmind_dn</strong></dt> <dd>These LDAP-specific tags indicate the default DN for binding to the LDAP server. The <a class="reference internal" href="../admin_commands/krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a> daemon uses <strong>ldap_kdc_dn</strong>, while the <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> daemon and other administrative programs use <strong>ldap_kadmind_dn</strong>. The kadmind DN must have the rights to read and write the Kerberos data in the LDAP database. The KDC DN must have the same rights, unless <strong>disable_lockout</strong> and <strong>disable_last_success</strong> are true, in which case it only needs to have rights to read the Kerberos data. These tags are ignored if a SASL mechanism is set with <strong>ldap_kdc_sasl_mech</strong> or <strong>ldap_kadmind_sasl_mech</strong>.</dd> <dt><strong>ldap_kdc_sasl_mech</strong> and <strong>ldap_kadmind_sasl_mech</strong></dt> <dd>These LDAP-specific tags specify the SASL mechanism (such as <tt class="docutils literal"><span class="pre">EXTERNAL</span></tt>) to use when binding to the LDAP server. New in release 1.13.</dd> <dt><strong>ldap_kdc_sasl_authcid</strong> and <strong>ldap_kadmind_sasl_authcid</strong></dt> <dd>These LDAP-specific tags specify the SASL authentication identity to use when binding to the LDAP server. Not all SASL mechanisms require an authentication identity. If the SASL mechanism requires a secret (such as the password for <tt class="docutils literal"><span class="pre">DIGEST-MD5</span></tt>), these tags also determine the name within the <strong>ldap_service_password_file</strong> where the secret is stashed. New in release 1.13.</dd> <dt><strong>ldap_kdc_sasl_authzid</strong> and <strong>ldap_kadmind_sasl_authzid</strong></dt> <dd>These LDAP-specific tags specify the SASL authorization identity to use when binding to the LDAP server. In most circumstances they do not need to be specified. New in release 1.13.</dd> <dt><strong>ldap_kdc_sasl_realm</strong> and <strong>ldap_kadmind_sasl_realm</strong></dt> <dd>These LDAP-specific tags specify the SASL realm to use when binding to the LDAP server. In most circumstances they do not need to be set. New in release 1.13.</dd> <dt><strong>ldap_kerberos_container_dn</strong></dt> <dd>This LDAP-specific tag indicates the DN of the container object where the realm objects will be located.</dd> <dt><strong>ldap_servers</strong></dt> <dd>This LDAP-specific tag indicates the list of LDAP servers that the Kerberos servers can connect to. The list of LDAP servers is whitespace-separated. The LDAP server is specified by a LDAP URI. It is recommended to use <tt class="docutils literal"><span class="pre">ldapi:</span></tt> or <tt class="docutils literal"><span class="pre">ldaps:</span></tt> URLs to connect to the LDAP server.</dd> <dt><strong>ldap_service_password_file</strong></dt> <dd>This LDAP-specific tag indicates the file containing the stashed passwords (created by <tt class="docutils literal"><span class="pre">kdb5_ldap_util</span> <span class="pre">stashsrvpw</span></tt>) for the <strong>ldap_kdc_dn</strong> and <strong>ldap_kadmind_dn</strong> objects, or for the <strong>ldap_kdc_sasl_authcid</strong> or <strong>ldap_kadmind_sasl_authcid</strong> names for SASL authentication. This file must be kept secure.</dd> <dt><strong>unlockiter</strong></dt> <dd>If set to <tt class="docutils literal"><span class="pre">true</span></tt>, this DB2-specific tag causes iteration operations to release the database lock while processing each principal. Setting this flag to <tt class="docutils literal"><span class="pre">true</span></tt> can prevent extended blocking of KDC or kadmin operations when dumps of large databases are in progress. First introduced in release 1.13.</dd> </dl> <p>The following tag may be specified directly in the [dbmodules] section to control where database modules are loaded from:</p> <dl class="docutils"> <dt><strong>db_module_dir</strong></dt> <dd>This tag controls where the plugin system looks for database modules. The value should be an absolute path.</dd> </dl> </div> <div class="section" id="logging"> <span id="id4"></span><h3>[logging]<a class="headerlink" href="#logging" title="Permalink to this headline">¶</a></h3> <p>The [logging] section indicates how <a class="reference internal" href="../admin_commands/krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a> and <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> perform logging. It may contain the following relations:</p> <dl class="docutils"> <dt><strong>admin_server</strong></dt> <dd>Specifies how <a class="reference internal" href="../admin_commands/kadmind.html#kadmind-8"><em>kadmind</em></a> performs logging.</dd> <dt><strong>kdc</strong></dt> <dd>Specifies how <a class="reference internal" href="../admin_commands/krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a> performs logging.</dd> <dt><strong>default</strong></dt> <dd>Specifies how either daemon performs logging in the absence of relations specific to the daemon.</dd> <dt><strong>debug</strong></dt> <dd>(Boolean value.) Specifies whether debugging messages are included in log outputs other than SYSLOG. Debugging messages are always included in the system log output because syslog performs its own priority filtering. The default value is false. New in release 1.15.</dd> </dl> <p>Logging specifications may have the following forms:</p> <dl class="docutils"> <dt><strong>FILE=</strong><em>filename</em> or <strong>FILE:</strong><em>filename</em></dt> <dd>This value causes the daemon’s logging messages to go to the <em>filename</em>. If the <tt class="docutils literal"><span class="pre">=</span></tt> form is used, the file is overwritten. If the <tt class="docutils literal"><span class="pre">:</span></tt> form is used, the file is appended to.</dd> <dt><strong>STDERR</strong></dt> <dd>This value causes the daemon’s logging messages to go to its standard error stream.</dd> <dt><strong>CONSOLE</strong></dt> <dd>This value causes the daemon’s logging messages to go to the console, if the system supports it.</dd> <dt><strong>DEVICE=</strong><em><devicename></em></dt> <dd>This causes the daemon’s logging messages to go to the specified device.</dd> <dt><strong>SYSLOG</strong>[<strong>:</strong><em>severity</em>[<strong>:</strong><em>facility</em>]]</dt> <dd><p class="first">This causes the daemon’s logging messages to go to the system log.</p> <p>The severity argument specifies the default severity of system log messages. This may be any of the following severities supported by the syslog(3) call, minus the <tt class="docutils literal"><span class="pre">LOG_</span></tt> prefix: <strong>EMERG</strong>, <strong>ALERT</strong>, <strong>CRIT</strong>, <strong>ERR</strong>, <strong>WARNING</strong>, <strong>NOTICE</strong>, <strong>INFO</strong>, and <strong>DEBUG</strong>.</p> <p>The facility argument specifies the facility under which the messages are logged. This may be any of the following facilities supported by the syslog(3) call minus the LOG_ prefix: <strong>KERN</strong>, <strong>USER</strong>, <strong>MAIL</strong>, <strong>DAEMON</strong>, <strong>AUTH</strong>, <strong>LPR</strong>, <strong>NEWS</strong>, <strong>UUCP</strong>, <strong>CRON</strong>, and <strong>LOCAL0</strong> through <strong>LOCAL7</strong>.</p> <p class="last">If no severity is specified, the default is <strong>ERR</strong>. If no facility is specified, the default is <strong>AUTH</strong>.</p> </dd> </dl> <p>In the following example, the logging messages from the KDC will go to the console and to the system log under the facility LOG_DAEMON with default severity of LOG_INFO; and the logging messages from the administrative server will be appended to the file <tt class="docutils literal"><span class="pre">/var/adm/kadmin.log</span></tt> and sent to the device <tt class="docutils literal"><span class="pre">/dev/tty04</span></tt>.</p> <div class="highlight-python"><pre>[logging] kdc = CONSOLE kdc = SYSLOG:INFO:DAEMON admin_server = FILE:/var/adm/kadmin.log admin_server = DEVICE=/dev/tty04</pre> </div> </div> <div class="section" id="otp"> <span id="id5"></span><h3>[otp]<a class="headerlink" href="#otp" title="Permalink to this headline">¶</a></h3> <p>Each subsection of [otp] is the name of an OTP token type. The tags within the subsection define the configuration required to forward a One Time Password request to a RADIUS server.</p> <p>For each token type, the following tags may be specified:</p> <dl class="docutils"> <dt><strong>server</strong></dt> <dd>This is the server to send the RADIUS request to. It can be a hostname with optional port, an ip address with optional port, or a Unix domain socket address. The default is <tt class="docutils literal"><span class="pre">/var/kerberos</span></tt><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt><tt class="docutils literal"><span class="pre">/<name>.socket</span></tt>.</dd> <dt><strong>secret</strong></dt> <dd>This tag indicates a filename (which may be relative to <tt class="docutils literal"><span class="pre">/var/kerberos</span></tt><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt>) containing the secret used to encrypt the RADIUS packets. The secret should appear in the first line of the file by itself; leading and trailing whitespace on the line will be removed. If the value of <strong>server</strong> is a Unix domain socket address, this tag is optional, and an empty secret will be used if it is not specified. Otherwise, this tag is required.</dd> <dt><strong>timeout</strong></dt> <dd>An integer which specifies the time in seconds during which the KDC should attempt to contact the RADIUS server. This tag is the total time across all retries and should be less than the time which an OTP value remains valid for. The default is 5 seconds.</dd> <dt><strong>retries</strong></dt> <dd>This tag specifies the number of retries to make to the RADIUS server. The default is 3 retries (4 tries).</dd> <dt><strong>strip_realm</strong></dt> <dd>If this tag is <tt class="docutils literal"><span class="pre">true</span></tt>, the principal without the realm will be passed to the RADIUS server. Otherwise, the realm will be included. The default value is <tt class="docutils literal"><span class="pre">true</span></tt>.</dd> <dt><strong>indicator</strong></dt> <dd>This tag specifies an authentication indicator to be included in the ticket if this token type is used to authenticate. This option may be specified multiple times. (New in release 1.14.)</dd> </dl> <p>In the following example, requests are sent to a remote server via UDP:</p> <div class="highlight-python"><pre>[otp] MyRemoteTokenType = { server = radius.mydomain.com:1812 secret = SEmfiajf42$ timeout = 15 retries = 5 strip_realm = true }</pre> </div> <p>An implicit default token type named <tt class="docutils literal"><span class="pre">DEFAULT</span></tt> is defined for when the per-principal configuration does not specify a token type. Its configuration is shown below. You may override this token type to something applicable for your situation:</p> <div class="highlight-python"><pre>[otp] DEFAULT = { strip_realm = false }</pre> </div> </div> </div> <div class="section" id="pkinit-options"> <h2>PKINIT options<a class="headerlink" href="#pkinit-options" title="Permalink to this headline">¶</a></h2> <div class="admonition note"> <p class="first admonition-title">Note</p> <p class="last">The following are pkinit-specific options. These values may be specified in [kdcdefaults] as global defaults, or within a realm-specific subsection of [realms]. Also note that a realm-specific value over-rides, does not add to, a generic [kdcdefaults] specification. The search order is:</p> </div> <ol class="arabic"> <li><p class="first">realm-specific subsection of [realms]:</p> <div class="highlight-python"><pre>[realms] EXAMPLE.COM = { pkinit_anchors = FILE:/usr/local/example.com.crt }</pre> </div> </li> <li><p class="first">generic value in the [kdcdefaults] section:</p> <div class="highlight-python"><pre>[kdcdefaults] pkinit_anchors = DIR:/usr/local/generic_trusted_cas/</pre> </div> </li> </ol> <p>For information about the syntax of some of these options, see <a class="reference internal" href="krb5_conf.html#pkinit-identity"><em>Specifying PKINIT identity information</em></a> in <a class="reference internal" href="krb5_conf.html#krb5-conf-5"><em>krb5.conf</em></a>.</p> <dl class="docutils"> <dt><strong>pkinit_anchors</strong></dt> <dd>Specifies the location of trusted anchor (root) certificates which the KDC trusts to sign client certificates. This option is required if pkinit is to be supported by the KDC. This option may be specified multiple times.</dd> <dt><strong>pkinit_dh_min_bits</strong></dt> <dd>Specifies the minimum number of bits the KDC is willing to accept for a client’s Diffie-Hellman key. The default is 2048.</dd> <dt><strong>pkinit_allow_upn</strong></dt> <dd><p class="first">Specifies that the KDC is willing to accept client certificates with the Microsoft UserPrincipalName (UPN) Subject Alternative Name (SAN). This means the KDC accepts the binding of the UPN in the certificate to the Kerberos principal name. The default value is false.</p> <p class="last">Without this option, the KDC will only accept certificates with the id-pkinit-san as defined in <span class="target" id="index-0"></span><a class="rfc reference external" href="http://tools.ietf.org/html/rfc4556.html"><strong>RFC 4556</strong></a>. There is currently no option to disable SAN checking in the KDC.</p> </dd> <dt><strong>pkinit_eku_checking</strong></dt> <dd><p class="first">This option specifies what Extended Key Usage (EKU) values the KDC is willing to accept in client certificates. The values recognized in the kdc.conf file are:</p> <dl class="last docutils"> <dt><strong>kpClientAuth</strong></dt> <dd>This is the default value and specifies that client certificates must have the id-pkinit-KPClientAuth EKU as defined in <span class="target" id="index-1"></span><a class="rfc reference external" href="http://tools.ietf.org/html/rfc4556.html"><strong>RFC 4556</strong></a>.</dd> <dt><strong>scLogin</strong></dt> <dd>If scLogin is specified, client certificates with the Microsoft Smart Card Login EKU (id-ms-kp-sc-logon) will be accepted.</dd> <dt><strong>none</strong></dt> <dd>If none is specified, then client certificates will not be checked to verify they have an acceptable EKU. The use of this option is not recommended.</dd> </dl> </dd> <dt><strong>pkinit_identity</strong></dt> <dd>Specifies the location of the KDC’s X.509 identity information. This option is required if pkinit is to be supported by the KDC.</dd> <dt><strong>pkinit_indicator</strong></dt> <dd>Specifies an authentication indicator to include in the ticket if pkinit is used to authenticate. This option may be specified multiple times. (New in release 1.14.)</dd> <dt><strong>pkinit_pool</strong></dt> <dd>Specifies the location of intermediate certificates which may be used by the KDC to complete the trust chain between a client’s certificate and a trusted anchor. This option may be specified multiple times.</dd> <dt><strong>pkinit_revoke</strong></dt> <dd>Specifies the location of Certificate Revocation List (CRL) information to be used by the KDC when verifying the validity of client certificates. This option may be specified multiple times.</dd> <dt><strong>pkinit_require_crl_checking</strong></dt> <dd><p class="first">The default certificate verification process will always check the available revocation information to see if a certificate has been revoked. If a match is found for the certificate in a CRL, verification fails. If the certificate being verified is not listed in a CRL, or there is no CRL present for its issuing CA, and <strong>pkinit_require_crl_checking</strong> is false, then verification succeeds.</p> <p>However, if <strong>pkinit_require_crl_checking</strong> is true and there is no CRL information available for the issuing CA, then verification fails.</p> <p class="last"><strong>pkinit_require_crl_checking</strong> should be set to true if the policy is such that up-to-date CRLs must be present for every CA.</p> </dd> </dl> </div> <div class="section" id="encryption-types"> <span id="id6"></span><h2>Encryption types<a class="headerlink" href="#encryption-types" title="Permalink to this headline">¶</a></h2> <p>Any tag in the configuration files which requires a list of encryption types can be set to some combination of the following strings. Encryption types marked as “weak” are available for compatibility but not recommended for use.</p> <table border="1" class="docutils"> <colgroup> <col width="44%" /> <col width="56%" /> </colgroup> <tbody valign="top"> <tr class="row-odd"><td>des-cbc-crc</td> <td>DES cbc mode with CRC-32 (weak)</td> </tr> <tr class="row-even"><td>des-cbc-md4</td> <td>DES cbc mode with RSA-MD4 (weak)</td> </tr> <tr class="row-odd"><td>des-cbc-md5</td> <td>DES cbc mode with RSA-MD5 (weak)</td> </tr> <tr class="row-even"><td>des-cbc-raw</td> <td>DES cbc mode raw (weak)</td> </tr> <tr class="row-odd"><td>des3-cbc-raw</td> <td>Triple DES cbc mode raw (weak)</td> </tr> <tr class="row-even"><td>des3-cbc-sha1 des3-hmac-sha1 des3-cbc-sha1-kd</td> <td>Triple DES cbc mode with HMAC/sha1</td> </tr> <tr class="row-odd"><td>des-hmac-sha1</td> <td>DES with HMAC/sha1 (weak)</td> </tr> <tr class="row-even"><td>aes256-cts-hmac-sha1-96 aes256-cts aes256-sha1</td> <td>AES-256 CTS mode with 96-bit SHA-1 HMAC</td> </tr> <tr class="row-odd"><td>aes128-cts-hmac-sha1-96 aes128-cts aes128-sha1</td> <td>AES-128 CTS mode with 96-bit SHA-1 HMAC</td> </tr> <tr class="row-even"><td>aes256-cts-hmac-sha384-192 aes256-sha2</td> <td>AES-256 CTS mode with 192-bit SHA-384 HMAC</td> </tr> <tr class="row-odd"><td>aes128-cts-hmac-sha256-128 aes128-sha2</td> <td>AES-128 CTS mode with 128-bit SHA-256 HMAC</td> </tr> <tr class="row-even"><td>arcfour-hmac rc4-hmac arcfour-hmac-md5</td> <td>RC4 with HMAC/MD5</td> </tr> <tr class="row-odd"><td>arcfour-hmac-exp rc4-hmac-exp arcfour-hmac-md5-exp</td> <td>Exportable RC4 with HMAC/MD5 (weak)</td> </tr> <tr class="row-even"><td>camellia256-cts-cmac camellia256-cts</td> <td>Camellia-256 CTS mode with CMAC</td> </tr> <tr class="row-odd"><td>camellia128-cts-cmac camellia128-cts</td> <td>Camellia-128 CTS mode with CMAC</td> </tr> <tr class="row-even"><td>des</td> <td>The DES family: des-cbc-crc, des-cbc-md5, and des-cbc-md4 (weak)</td> </tr> <tr class="row-odd"><td>des3</td> <td>The triple DES family: des3-cbc-sha1</td> </tr> <tr class="row-even"><td>aes</td> <td>The AES family: aes256-cts-hmac-sha1-96 and aes128-cts-hmac-sha1-96</td> </tr> <tr class="row-odd"><td>rc4</td> <td>The RC4 family: arcfour-hmac</td> </tr> <tr class="row-even"><td>camellia</td> <td>The Camellia family: camellia256-cts-cmac and camellia128-cts-cmac</td> </tr> </tbody> </table> <p>The string <strong>DEFAULT</strong> can be used to refer to the default set of types for the variable in question. Types or families can be removed from the current list by prefixing them with a minus sign (“-”). Types or families can be prefixed with a plus sign (“+”) for symmetry; it has the same meaning as just listing the type or family. For example, “<tt class="docutils literal"><span class="pre">DEFAULT</span> <span class="pre">-des</span></tt>” would be the default set of encryption types with DES types removed, and “<tt class="docutils literal"><span class="pre">des3</span> <span class="pre">DEFAULT</span></tt>” would be the default set of encryption types with triple DES types moved to the front.</p> <p>While <strong>aes128-cts</strong> and <strong>aes256-cts</strong> are supported for all Kerberos operations, they are not supported by very old versions of our GSSAPI implementation (krb5-1.3.1 and earlier). Services running versions of krb5 without AES support must not be given keys of these encryption types in the KDC database.</p> <p>The <strong>aes128-sha2</strong> and <strong>aes256-sha2</strong> encryption types are new in release 1.15. Services running versions of krb5 without support for these newer encryption types must not be given keys of these encryption types in the KDC database.</p> </div> <div class="section" id="keysalt-lists"> <span id="id7"></span><h2>Keysalt lists<a class="headerlink" href="#keysalt-lists" title="Permalink to this headline">¶</a></h2> <p>Kerberos keys for users are usually derived from passwords. Kerberos commands and configuration parameters that affect generation of keys take lists of enctype-salttype (“keysalt”) pairs, known as <em>keysalt lists</em>. Each keysalt pair is an enctype name followed by a salttype name, in the format <em>enc</em>:<em>salt</em>. Individual keysalt list members are separated by comma (”,”) characters or space characters. For example:</p> <div class="highlight-python"><pre>kadmin -e aes256-cts:normal,aes128-cts:normal</pre> </div> <p>would start up kadmin so that by default it would generate password-derived keys for the <strong>aes256-cts</strong> and <strong>aes128-cts</strong> encryption types, using a <strong>normal</strong> salt.</p> <p>To ensure that people who happen to pick the same password do not have the same key, Kerberos 5 incorporates more information into the key using something called a salt. The supported salt types are as follows:</p> <table border="1" class="docutils"> <colgroup> <col width="21%" /> <col width="79%" /> </colgroup> <tbody valign="top"> <tr class="row-odd"><td>normal</td> <td>default for Kerberos Version 5</td> </tr> <tr class="row-even"><td>v4</td> <td>the only type used by Kerberos Version 4 (no salt)</td> </tr> <tr class="row-odd"><td>norealm</td> <td>same as the default, without using realm information</td> </tr> <tr class="row-even"><td>onlyrealm</td> <td>uses only realm information as the salt</td> </tr> <tr class="row-odd"><td>afs3</td> <td>AFS version 3, only used for compatibility with Kerberos 4 in AFS</td> </tr> <tr class="row-even"><td>special</td> <td>generate a random salt</td> </tr> </tbody> </table> </div> <div class="section" id="sample-kdc-conf-file"> <h2>Sample kdc.conf File<a class="headerlink" href="#sample-kdc-conf-file" title="Permalink to this headline">¶</a></h2> <p>Here’s an example of a kdc.conf file:</p> <div class="highlight-python"><pre>[kdcdefaults] kdc_listen = 88 kdc_tcp_listen = 88 [realms] ATHENA.MIT.EDU = { kadmind_port = 749 max_life = 12h 0m 0s max_renewable_life = 7d 0h 0m 0s master_key_type = aes256-cts-hmac-sha1-96 supported_enctypes = aes256-cts-hmac-sha1-96:normal aes128-cts-hmac-sha1-96:normal database_module = openldap_ldapconf } [logging] kdc = FILE:/usr/local/var/krb5kdc/kdc.log admin_server = FILE:/usr/local/var/krb5kdc/kadmin.log [dbdefaults] ldap_kerberos_container_dn = cn=krbcontainer,dc=mit,dc=edu [dbmodules] openldap_ldapconf = { db_library = kldap disable_last_success = true ldap_kdc_dn = "cn=krbadmin,dc=mit,dc=edu" # this object needs to have read rights on # the realm container and principal subtrees ldap_kadmind_dn = "cn=krbadmin,dc=mit,dc=edu" # this object needs to have read and write rights on # the realm container and principal subtrees ldap_service_password_file = /etc/kerberos/service.keyfile ldap_servers = ldaps://kerberos.mit.edu ldap_conns_per_server = 5 }</pre> </div> </div> <div class="section" id="files"> <h2>FILES<a class="headerlink" href="#files" title="Permalink to this headline">¶</a></h2> <p><tt class="docutils literal"><span class="pre">/var/kerberos</span></tt><tt class="docutils literal"><span class="pre">/krb5kdc</span></tt><tt class="docutils literal"><span class="pre">/kdc.conf</span></tt></p> </div> <div class="section" id="see-also"> <h2>SEE ALSO<a class="headerlink" href="#see-also" title="Permalink to this headline">¶</a></h2> <p><a class="reference internal" href="krb5_conf.html#krb5-conf-5"><em>krb5.conf</em></a>, <a class="reference internal" href="../admin_commands/krb5kdc.html#krb5kdc-8"><em>krb5kdc</em></a>, <a class="reference internal" href="kadm5_acl.html#kadm5-acl-5"><em>kadm5.acl</em></a></p> </div> </div> </div> </div> </div> </div> <div class="sidebar"> <h2>On this page</h2> <ul> <li><a class="reference internal" href="#">kdc.conf</a><ul> <li><a class="reference internal" href="#structure">Structure</a></li> <li><a class="reference internal" href="#sections">Sections</a><ul> <li><a class="reference internal" href="#kdcdefaults">[kdcdefaults]</a></li> <li><a class="reference internal" href="#realms">[realms]</a></li> <li><a class="reference internal" href="#dbdefaults">[dbdefaults]</a></li> <li><a class="reference internal" href="#dbmodules">[dbmodules]</a></li> <li><a class="reference internal" href="#logging">[logging]</a></li> <li><a class="reference internal" href="#otp">[otp]</a></li> </ul> </li> <li><a class="reference internal" href="#pkinit-options">PKINIT options</a></li> <li><a class="reference internal" href="#encryption-types">Encryption types</a></li> <li><a class="reference internal" href="#keysalt-lists">Keysalt lists</a></li> <li><a class="reference internal" href="#sample-kdc-conf-file">Sample kdc.conf File</a></li> <li><a class="reference internal" href="#files">FILES</a></li> <li><a class="reference internal" href="#see-also">SEE ALSO</a></li> </ul> </li> </ul> <br/> <h2>Table of contents</h2> <ul class="current"> <li class="toctree-l1"><a class="reference internal" href="../../user/index.html">For users</a></li> <li class="toctree-l1 current"><a class="reference internal" href="../index.html">For administrators</a><ul class="current"> <li class="toctree-l2"><a class="reference internal" href="../install.html">Installation guide</a></li> <li class="toctree-l2 current"><a class="reference internal" href="index.html">Configuration Files</a><ul class="current"> <li class="toctree-l3"><a class="reference internal" href="krb5_conf.html">krb5.conf</a></li> <li class="toctree-l3 current"><a class="current reference internal" href="">kdc.conf</a></li> <li class="toctree-l3"><a class="reference internal" href="kadm5_acl.html">kadm5.acl</a></li> </ul> </li> <li class="toctree-l2"><a class="reference internal" href="../realm_config.html">Realm configuration decisions</a></li> <li class="toctree-l2"><a class="reference 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internal" href="../enctypes.html">Encryption types</a></li> <li class="toctree-l2"><a class="reference internal" href="../https.html">HTTPS proxy configuration</a></li> <li class="toctree-l2"><a class="reference internal" href="../auth_indicator.html">Authentication indicators</a></li> <li class="toctree-l2"><a class="reference internal" href="../admin_commands/index.html">Administration programs</a></li> <li class="toctree-l2"><a class="reference internal" href="../../mitK5defaults.html">MIT Kerberos defaults</a></li> <li class="toctree-l2"><a class="reference internal" href="../env_variables.html">Environment variables</a></li> <li class="toctree-l2"><a class="reference internal" href="../troubleshoot.html">Troubleshooting</a></li> <li class="toctree-l2"><a class="reference internal" href="../advanced/index.html">Advanced topics</a></li> <li class="toctree-l2"><a class="reference internal" href="../various_envs.html">Various links</a></li> </ul> </li> <li class="toctree-l1"><a 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