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<section id="mit-kerberos-defaults">
<span id="mitk5defaults"></span><h1>MIT Kerberos defaults<a class="headerlink" href="#mit-kerberos-defaults" title="Link to this heading">¶</a></h1>
<section id="general-defaults">
<h2>General defaults<a class="headerlink" href="#general-defaults" title="Link to this heading">¶</a></h2>
<table class="docutils align-default">
<thead>
<tr class="row-odd"><th class="head"><p>Description</p></th>
<th class="head"><p>Default</p></th>
<th class="head"><p>Environment</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p><a class="reference internal" href="basic/keytab_def.html#keytab-definition"><span class="std std-ref">keytab</span></a> file</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">DEFKTNAME</span></a></p></td>
<td><p><strong>KRB5_KTNAME</strong></p></td>
</tr>
<tr class="row-odd"><td><p>Client <a class="reference internal" href="basic/keytab_def.html#keytab-definition"><span class="std std-ref">keytab</span></a> file</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">DEFCKTNAME</span></a></p></td>
<td><p><strong>KRB5_CLIENT_KTNAME</strong></p></td>
</tr>
<tr class="row-even"><td><p>Kerberos config file <a class="reference internal" href="admin/conf_files/krb5_conf.html#krb5-conf-5"><span class="std std-ref">krb5.conf</span></a></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/etc/krb5.conf</span></code><code class="docutils literal notranslate"><span class="pre">:</span></code><a class="reference internal" href="#paths"><span class="std std-ref">SYSCONFDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5.conf</span></code></p></td>
<td><p><strong>KRB5_CONFIG</strong></p></td>
</tr>
<tr class="row-odd"><td><p>KDC config file <a class="reference internal" href="admin/conf_files/kdc_conf.html#kdc-conf-5"><span class="std std-ref">kdc.conf</span></a></p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">LOCALSTATEDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5kdc</span></code><code class="docutils literal notranslate"><span class="pre">/kdc.conf</span></code></p></td>
<td><p><strong>KRB5_KDC_PROFILE</strong></p></td>
</tr>
<tr class="row-even"><td><p>GSS mechanism config file</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">SYSCONFDIR</span></a><code class="docutils literal notranslate"><span class="pre">/gss/mech</span></code></p></td>
<td><p><strong>GSS_MECH_CONFIG</strong></p></td>
</tr>
<tr class="row-odd"><td><p>KDC database path (DB2)</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">LOCALSTATEDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5kdc</span></code><code class="docutils literal notranslate"><span class="pre">/principal</span></code></p></td>
<td></td>
</tr>
<tr class="row-even"><td><p>Master key <a class="reference internal" href="basic/stash_file_def.html#stash-definition"><span class="std std-ref">stash file</span></a></p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">LOCALSTATEDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5kdc</span></code><code class="docutils literal notranslate"><span class="pre">/.k5.</span></code><em>realm</em></p></td>
<td></td>
</tr>
<tr class="row-odd"><td><p>Admin server ACL file <a class="reference internal" href="admin/conf_files/kadm5_acl.html#kadm5-acl-5"><span class="std std-ref">kadm5.acl</span></a></p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">LOCALSTATEDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5kdc</span></code><code class="docutils literal notranslate"><span class="pre">/kadm5.acl</span></code></p></td>
<td></td>
</tr>
<tr class="row-even"><td><p>OTP socket directory</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">RUNSTATEDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5kdc</span></code></p></td>
<td></td>
</tr>
<tr class="row-odd"><td><p>Plugin base directory</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">LIBDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5/plugins</span></code></p></td>
<td></td>
</tr>
<tr class="row-even"><td><p><a class="reference internal" href="basic/rcache_def.html#rcache-definition"><span class="std std-ref">replay cache</span></a> directory</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/var/tmp</span></code></p></td>
<td><p><strong>KRB5RCACHEDIR</strong></p></td>
</tr>
<tr class="row-odd"><td><p>Master key default enctype</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">aes256-cts-hmac-sha1-96</span></code></p></td>
<td></td>
</tr>
<tr class="row-even"><td><p>Default <a class="reference internal" href="admin/conf_files/kdc_conf.html#keysalt-lists"><span class="std std-ref">keysalt list</span></a></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">aes256-cts-hmac-sha1-96:normal</span> <span class="pre">aes128-cts-hmac-sha1-96:normal</span></code></p></td>
<td></td>
</tr>
<tr class="row-odd"><td><p>Permitted enctypes</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">aes256-cts-hmac-sha1-96</span> <span class="pre">aes128-cts-hmac-sha1-96</span> <span class="pre">aes256-cts-hmac-sha384-192</span> <span class="pre">aes128-cts-hmac-sha256-128</span> <span class="pre">des3-cbc-sha1</span> <span class="pre">arcfour-hmac-md5</span> <span class="pre">camellia256-cts-cmac</span> <span class="pre">camellia128-cts-cmac</span></code></p></td>
<td></td>
</tr>
<tr class="row-even"><td><p>KDC default port</p></td>
<td><p>88</p></td>
<td></td>
</tr>
<tr class="row-odd"><td><p>Admin server port</p></td>
<td><p>749</p></td>
<td></td>
</tr>
<tr class="row-even"><td><p>Password change port</p></td>
<td><p>464</p></td>
<td></td>
</tr>
</tbody>
</table>
</section>
<section id="replica-kdc-propagation-defaults">
<h2>Replica KDC propagation defaults<a class="headerlink" href="#replica-kdc-propagation-defaults" title="Link to this heading">¶</a></h2>
<p>This table shows defaults used by the <a class="reference internal" href="admin/admin_commands/kprop.html#kprop-8"><span class="std std-ref">kprop</span></a> and
<a class="reference internal" href="admin/admin_commands/kpropd.html#kpropd-8"><span class="std std-ref">kpropd</span></a> programs.</p>
<table class="docutils align-default">
<thead>
<tr class="row-odd"><th class="head"><p>Description</p></th>
<th class="head"><p>Default</p></th>
<th class="head"><p>Environment</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>kprop database dump file</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">LOCALSTATEDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5kdc</span></code><code class="docutils literal notranslate"><span class="pre">/replica_datatrans</span></code></p></td>
<td></td>
</tr>
<tr class="row-odd"><td><p>kpropd temporary dump file</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">LOCALSTATEDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5kdc</span></code><code class="docutils literal notranslate"><span class="pre">/from_master</span></code></p></td>
<td></td>
</tr>
<tr class="row-even"><td><p>kdb5_util location</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">SBINDIR</span></a><code class="docutils literal notranslate"><span class="pre">/kdb5_util</span></code></p></td>
<td></td>
</tr>
<tr class="row-odd"><td><p>kprop location</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">SBINDIR</span></a><code class="docutils literal notranslate"><span class="pre">/kprop</span></code></p></td>
<td></td>
</tr>
<tr class="row-even"><td><p>kpropd ACL file</p></td>
<td><p><a class="reference internal" href="#paths"><span class="std std-ref">LOCALSTATEDIR</span></a><code class="docutils literal notranslate"><span class="pre">/krb5kdc</span></code><code class="docutils literal notranslate"><span class="pre">/kpropd.acl</span></code></p></td>
<td></td>
</tr>
<tr class="row-odd"><td><p>kprop port</p></td>
<td><p>754</p></td>
<td><p>KPROP_PORT</p></td>
</tr>
</tbody>
</table>
</section>
<section id="default-paths-for-unix-like-systems">
<span id="paths"></span><h2>Default paths for Unix-like systems<a class="headerlink" href="#default-paths-for-unix-like-systems" title="Link to this heading">¶</a></h2>
<p>On Unix-like systems, some paths used by MIT krb5 depend on parameters
chosen at build time. For a custom build, these paths default to
subdirectories of <code class="docutils literal notranslate"><span class="pre">/usr/local</span></code>. When MIT krb5 is integrated into an
operating system, the paths are generally chosen to match the
operating system’s filesystem layout.</p>
<table class="docutils align-default">
<thead>
<tr class="row-odd"><th class="head"><p>Description</p></th>
<th class="head"><p>Symbolic name</p></th>
<th class="head"><p>Custom build path</p></th>
<th class="head"><p>Typical OS path</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>User programs</p></td>
<td><p>BINDIR</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/usr/local/bin</span></code></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/usr/bin</span></code></p></td>
</tr>
<tr class="row-odd"><td><p>Libraries and plugins</p></td>
<td><p>LIBDIR</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/usr/local/lib</span></code></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/usr/lib</span></code></p></td>
</tr>
<tr class="row-even"><td><p>Parent of KDC state dir</p></td>
<td><p>LOCALSTATEDIR</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/usr/local/var</span></code></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/var</span></code></p></td>
</tr>
<tr class="row-odd"><td><p>Parent of KDC runtime dir</p></td>
<td><p>RUNSTATEDIR</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/usr/local/var/run</span></code></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/run</span></code></p></td>
</tr>
<tr class="row-even"><td><p>Administrative programs</p></td>
<td><p>SBINDIR</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/usr/local/sbin</span></code></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/usr/sbin</span></code></p></td>
</tr>
<tr class="row-odd"><td><p>Alternate krb5.conf dir</p></td>
<td><p>SYSCONFDIR</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/usr/local/etc</span></code></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">/etc</span></code></p></td>
</tr>
<tr class="row-even"><td><p>Default ccache name</p></td>
<td><p>DEFCCNAME</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">FILE:/tmp/krb5cc_%{uid}</span></code></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">FILE:/tmp/krb5cc_%{uid}</span></code></p></td>
</tr>
<tr class="row-odd"><td><p>Default keytab name</p></td>
<td><p>DEFKTNAME</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">FILE:/etc/krb5.keytab</span></code></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">FILE:/etc/krb5.keytab</span></code></p></td>
</tr>
<tr class="row-even"><td><p>Default PKCS11 module</p></td>
<td><p>PKCS11_MODNAME</p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">opensc-pkcs11.so</span></code></p></td>
<td><p><code class="docutils literal notranslate"><span class="pre">opensc-pkcs11.so</span></code></p></td>
</tr>
</tbody>
</table>
<p>The default client keytab name (DEFCKTNAME) typically defaults to
<code class="docutils literal notranslate"><span class="pre">FILE:/usr/local/var/krb5/user/%{euid}/client.keytab</span></code> for a custom
build. A native build will typically use a path which will vary
according to the operating system’s layout of <code class="docutils literal notranslate"><span class="pre">/var</span></code>.</p>
</section>
</section>
<div class="clearer"></div>
</div>
</div>
</div>
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<h2>On this page</h2>
<ul>
<li><a class="reference internal" href="#">MIT Kerberos defaults</a><ul>
<li><a class="reference internal" href="#general-defaults">General defaults</a></li>
<li><a class="reference internal" href="#replica-kdc-propagation-defaults">Replica KDC propagation defaults</a></li>
<li><a class="reference internal" href="#default-paths-for-unix-like-systems">Default paths for Unix-like systems</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="admin/index.html">For administrators</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="admin/install.html">Installation guide</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/conf_files/index.html">Configuration Files</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/realm_config.html">Realm configuration decisions</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/database.html">Database administration</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/dbtypes.html">Database types</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/lockout.html">Account lockout</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/conf_ldap.html">Configuring Kerberos with OpenLDAP back-end</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/appl_servers.html">Application servers</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/host_config.html">Host configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/backup_host.html">Backups of secure hosts</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/pkinit.html">PKINIT configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/otp.html">OTP Preauthentication</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/spake.html">SPAKE Preauthentication</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/dictionary.html">Addressing dictionary attack risks</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/princ_dns.html">Principal names and DNS</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/enctypes.html">Encryption types</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/https.html">HTTPS proxy configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/auth_indicator.html">Authentication indicators</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/admin_commands/index.html">Administration programs</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">MIT Kerberos defaults</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/env_variables.html">Environment variables</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/troubleshoot.html">Troubleshooting</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/advanced/index.html">Advanced topics</a></li>
<li class="toctree-l2"><a class="reference internal" href="admin/various_envs.html">Various links</a></li>
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<li class="toctree-l1"><a class="reference internal" href="appdev/index.html">For application developers</a></li>
<li class="toctree-l1"><a class="reference internal" href="plugindev/index.html">For plugin module developers</a></li>
<li class="toctree-l1"><a class="reference internal" href="build/index.html">Building Kerberos V5</a></li>
<li class="toctree-l1"><a class="reference internal" href="basic/index.html">Kerberos V5 concepts</a></li>
<li class="toctree-l1"><a class="reference internal" href="formats/index.html">Protocols and file formats</a></li>
<li class="toctree-l1"><a class="reference internal" href="mitK5features.html">MIT Kerberos features</a></li>
<li class="toctree-l1"><a class="reference internal" href="build_this.html">How to build this documentation from the source</a></li>
<li class="toctree-l1"><a class="reference internal" href="about.html">Contributing to the MIT Kerberos Documentation</a></li>
<li class="toctree-l1"><a class="reference internal" href="resources.html">Resources</a></li>
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