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- <h1><a href="../index.html">MIT Kerberos Documentation</a></h1>
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-
- <section id="troubleshooting">
-<span id="troubleshoot"></span><h1>Troubleshooting<a class="headerlink" href="#troubleshooting" title="Link to this heading">¶</a></h1>
-<section id="trace-logging">
-<span id="id1"></span><h2>Trace logging<a class="headerlink" href="#trace-logging" title="Link to this heading">¶</a></h2>
-<p>Most programs using MIT krb5 1.9 or later can be made to provide
-information about internal krb5 library operations using trace
-logging. To enable this, set the <strong>KRB5_TRACE</strong> environment variable
-to a filename before running the program. On many operating systems,
-the filename <code class="docutils literal notranslate"><span class="pre">/dev/stdout</span></code> can be used to send trace logging output
-to standard output.</p>
-<p>Some programs do not honor <strong>KRB5_TRACE</strong>, either because they use
-secure library contexts (this generally applies to setuid programs and
-parts of the login system) or because they take direct control of the
-trace logging system using the API.</p>
-<p>Here is a short example showing trace logging output for an invocation
-of the <a class="reference internal" href="../user/user_commands/kvno.html#kvno-1"><span class="std std-ref">kvno</span></a> command:</p>
-<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">shell</span><span class="o">%</span> <span class="n">env</span> <span class="n">KRB5_TRACE</span><span class="o">=/</span><span class="n">dev</span><span class="o">/</span><span class="n">stdout</span> <span class="n">kvno</span> <span class="n">krbtgt</span><span class="o">/</span><span class="n">KRBTEST</span><span class="o">.</span><span class="n">COM</span>
-<span class="p">[</span><span class="mi">9138</span><span class="p">]</span> <span class="mf">1332348778.823276</span><span class="p">:</span> <span class="n">Getting</span> <span class="n">credentials</span> <span class="n">user</span><span class="nd">@KRBTEST</span><span class="o">.</span><span class="n">COM</span> <span class="o">-&gt;</span>
- <span class="n">krbtgt</span><span class="o">/</span><span class="n">KRBTEST</span><span class="o">.</span><span class="n">COM</span><span class="nd">@KRBTEST</span><span class="o">.</span><span class="n">COM</span> <span class="n">using</span> <span class="n">ccache</span>
- <span class="n">FILE</span><span class="p">:</span><span class="o">/</span><span class="n">me</span><span class="o">/</span><span class="n">krb5</span><span class="o">/</span><span class="n">build</span><span class="o">/</span><span class="n">testdir</span><span class="o">/</span><span class="n">ccache</span>
-<span class="p">[</span><span class="mi">9138</span><span class="p">]</span> <span class="mf">1332348778.823381</span><span class="p">:</span> <span class="n">Retrieving</span> <span class="n">user</span><span class="nd">@KRBTEST</span><span class="o">.</span><span class="n">COM</span> <span class="o">-&gt;</span>
- <span class="n">krbtgt</span><span class="o">/</span><span class="n">KRBTEST</span><span class="o">.</span><span class="n">COM</span><span class="nd">@KRBTEST</span><span class="o">.</span><span class="n">COM</span> <span class="kn">from</span>
- <span class="nn">FILE</span><span class="p">:</span><span class="o">/</span><span class="n">me</span><span class="o">/</span><span class="n">krb5</span><span class="o">/</span><span class="n">build</span><span class="o">/</span><span class="n">testdir</span><span class="o">/</span><span class="n">ccache</span> <span class="k">with</span> <span class="n">result</span><span class="p">:</span> <span class="mi">0</span><span class="o">/</span><span class="n">Unknown</span> <span class="n">code</span> <span class="mi">0</span>
-<span class="n">krbtgt</span><span class="o">/</span><span class="n">KRBTEST</span><span class="o">.</span><span class="n">COM</span><span class="nd">@KRBTEST</span><span class="o">.</span><span class="n">COM</span><span class="p">:</span> <span class="n">kvno</span> <span class="o">=</span> <span class="mi">1</span>
-</pre></div>
-</div>
-</section>
-<section id="list-of-errors">
-<h2>List of errors<a class="headerlink" href="#list-of-errors" title="Link to this heading">¶</a></h2>
-<section id="frequently-seen-errors">
-<h3>Frequently seen errors<a class="headerlink" href="#frequently-seen-errors" title="Link to this heading">¶</a></h3>
-<ol class="arabic simple">
-<li><p><a class="reference internal" href="#init-creds-etype-nosupp"><span class="std std-ref">KDC has no support for encryption type while getting initial credentials</span></a></p></li>
-<li><p><a class="reference internal" href="#cert-chain-etype-nosupp"><span class="std std-ref">credential verification failed: KDC has no support for encryption type</span></a></p></li>
-<li><p><a class="reference internal" href="#err-cert-chain-cert-expired"><span class="std std-ref">Cannot create cert chain: certificate has expired</span></a></p></li>
-</ol>
-</section>
-<section id="errors-seen-by-admins">
-<h3>Errors seen by admins<a class="headerlink" href="#errors-seen-by-admins" title="Link to this heading">¶</a></h3>
-<ol class="arabic simple" id="prop-failed-start">
-<li><p><a class="reference internal" href="#kprop-no-route"><span class="std std-ref">kprop: No route to host while connecting to server</span></a></p></li>
-<li><p><a class="reference internal" href="#kprop-con-refused"><span class="std std-ref">kprop: Connection refused while connecting to server</span></a></p></li>
-<li><p><a class="reference internal" href="#kprop-sendauth-exchange"><span class="std std-ref">kprop: Server rejected authentication (during sendauth exchange) while authenticating to server</span></a></p></li>
-</ol>
-<hr class="docutils" id="prop-failed-end" />
-<section id="kdc-has-no-support-for-encryption-type-while-getting-initial-credentials">
-<span id="init-creds-etype-nosupp"></span><h4>KDC has no support for encryption type while getting initial credentials<a class="headerlink" href="#kdc-has-no-support-for-encryption-type-while-getting-initial-credentials" title="Link to this heading">¶</a></h4>
-</section>
-<section id="credential-verification-failed-kdc-has-no-support-for-encryption-type">
-<span id="cert-chain-etype-nosupp"></span><h4>credential verification failed: KDC has no support for encryption type<a class="headerlink" href="#credential-verification-failed-kdc-has-no-support-for-encryption-type" title="Link to this heading">¶</a></h4>
-<p>This most commonly happens when trying to use a principal with only
-DES keys, in a release (MIT krb5 1.7 or later) which disables DES by
-default. DES encryption is considered weak due to its inadequate key
-size. If you cannot migrate away from its use, you can re-enable DES
-by adding <code class="docutils literal notranslate"><span class="pre">allow_weak_crypto</span> <span class="pre">=</span> <span class="pre">true</span></code> to the <a class="reference internal" href="conf_files/krb5_conf.html#libdefaults"><span class="std std-ref">[libdefaults]</span></a>
-section of <a class="reference internal" href="conf_files/krb5_conf.html#krb5-conf-5"><span class="std std-ref">krb5.conf</span></a>.</p>
-</section>
-<section id="cannot-create-cert-chain-certificate-has-expired">
-<span id="err-cert-chain-cert-expired"></span><h4>Cannot create cert chain: certificate has expired<a class="headerlink" href="#cannot-create-cert-chain-certificate-has-expired" title="Link to this heading">¶</a></h4>
-<p>This error message indicates that PKINIT authentication failed because
-the client certificate, KDC certificate, or one of the certificates in
-the signing chain above them has expired.</p>
-<p>If the KDC certificate has expired, this message appears in the KDC
-log file, and the client will receive a “Preauthentication failed”
-error. (Prior to release 1.11, the KDC log file message erroneously
-appears as “Out of memory”. Prior to release 1.12, the client will
-receive a “Generic error”.)</p>
-<p>If the client or a signing certificate has expired, this message may
-appear in <a class="reference internal" href="#trace-logging">trace_logging</a> output from <a class="reference internal" href="../user/user_commands/kinit.html#kinit-1"><span class="std std-ref">kinit</span></a> or, starting in
-release 1.12, as an error message from kinit or another program which
-gets initial tickets. The error message is more likely to appear
-properly on the client if the principal entry has no long-term keys.</p>
-</section>
-<section id="kprop-no-route-to-host-while-connecting-to-server">
-<span id="kprop-no-route"></span><h4>kprop: No route to host while connecting to server<a class="headerlink" href="#kprop-no-route-to-host-while-connecting-to-server" title="Link to this heading">¶</a></h4>
-<p>Make sure that the hostname of the replica KDC (as given to kprop) is
-correct, and that any firewalls between the primary and the replica
-allow a connection on port 754.</p>
-</section>
-<section id="kprop-connection-refused-while-connecting-to-server">
-<span id="kprop-con-refused"></span><h4>kprop: Connection refused while connecting to server<a class="headerlink" href="#kprop-connection-refused-while-connecting-to-server" title="Link to this heading">¶</a></h4>
-<p>If the replica KDC is intended to run kpropd out of inetd, make sure
-that inetd is configured to accept krb5_prop connections. inetd may
-need to be restarted or sent a SIGHUP to recognize the new
-configuration. If the replica is intended to run kpropd in standalone
-mode, make sure that it is running.</p>
-</section>
-<section id="kprop-server-rejected-authentication-during-sendauth-exchange-while-authenticating-to-server">
-<span id="kprop-sendauth-exchange"></span><h4>kprop: Server rejected authentication (during sendauth exchange) while authenticating to server<a class="headerlink" href="#kprop-server-rejected-authentication-during-sendauth-exchange-while-authenticating-to-server" title="Link to this heading">¶</a></h4>
-<p>Make sure that:</p>
-<ol class="arabic simple">
-<li><p>The time is synchronized between the primary and replica KDCs.</p></li>
-<li><p>The master stash file was copied from the primary to the expected
-location on the replica.</p></li>
-<li><p>The replica has a keytab file in the default location containing a
-<code class="docutils literal notranslate"><span class="pre">host</span></code> principal for the replica’s hostname.</p></li>
-</ol>
-</section>
-</section>
-</section>
-</section>
-
-
- <div class="clearer"></div>
- </div>
- </div>
- </div>
- </div>
- <div class="sidebar">
-
- <h2>On this page</h2>
- <ul>
-<li><a class="reference internal" href="#">Troubleshooting</a><ul>
-<li><a class="reference internal" href="#trace-logging">Trace logging</a></li>
-<li><a class="reference internal" href="#list-of-errors">List of errors</a><ul>
-<li><a class="reference internal" href="#frequently-seen-errors">Frequently seen errors</a></li>
-<li><a class="reference internal" href="#errors-seen-by-admins">Errors seen by admins</a><ul>
-<li><a class="reference internal" href="#kdc-has-no-support-for-encryption-type-while-getting-initial-credentials">KDC has no support for encryption type while getting initial credentials</a></li>
-<li><a class="reference internal" href="#credential-verification-failed-kdc-has-no-support-for-encryption-type">credential verification failed: KDC has no support for encryption type</a></li>
-<li><a class="reference internal" href="#cannot-create-cert-chain-certificate-has-expired">Cannot create cert chain: certificate has expired</a></li>
-<li><a class="reference internal" href="#kprop-no-route-to-host-while-connecting-to-server">kprop: No route to host while connecting to server</a></li>
-<li><a class="reference internal" href="#kprop-connection-refused-while-connecting-to-server">kprop: Connection refused while connecting to server</a></li>
-<li><a class="reference internal" href="#kprop-server-rejected-authentication-during-sendauth-exchange-while-authenticating-to-server">kprop: Server rejected authentication (during sendauth exchange) while authenticating to server</a></li>
-</ul>
-</li>
-</ul>
-</li>
-</ul>
-</li>
-</ul>
-
- <br/>
- <h2>Table of contents</h2>
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-<li class="toctree-l1"><a class="reference internal" href="../user/index.html">For users</a></li>
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-<li class="toctree-l2"><a class="reference internal" href="conf_ldap.html">Configuring Kerberos with OpenLDAP back-end</a></li>
-<li class="toctree-l2"><a class="reference internal" href="appl_servers.html">Application servers</a></li>
-<li class="toctree-l2"><a class="reference internal" href="host_config.html">Host configuration</a></li>
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-<li class="toctree-l2"><a class="reference internal" href="pkinit.html">PKINIT configuration</a></li>
-<li class="toctree-l2"><a class="reference internal" href="otp.html">OTP Preauthentication</a></li>
-<li class="toctree-l2"><a class="reference internal" href="spake.html">SPAKE Preauthentication</a></li>
-<li class="toctree-l2"><a class="reference internal" href="dictionary.html">Addressing dictionary attack risks</a></li>
-<li class="toctree-l2"><a class="reference internal" href="princ_dns.html">Principal names and DNS</a></li>
-<li class="toctree-l2"><a class="reference 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 current"><a class="current reference internal" href="#">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>
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-<li class="toctree-l1"><a class="reference internal" href="../about.html">Contributing to the MIT Kerberos Documentation</a></li>
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