<!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>sserver — 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: '1.11.4', 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="Administration programs" href="index.html" /> <link rel="next" title="MIT Kerberos defaults" href="../../mitK5defaults.html" /> <link rel="prev" title="k5srvutil" href="k5srvutil.html" /> </head> <body> <div class="header-wrapper"> <div class="header" style="padding-bottom: 0px;"> <h1><a href="../../index.html" style="color: #5d1509; font-size: 120%; padding-top: 10px;">MIT Kerberos Documentation</a></h1> <div class="rel"> <a href="../../index.html" title="Full Table of Contents" accesskey="C">Contents</a> | <a href="k5srvutil.html" title="k5srvutil" accesskey="P">previous</a> | <a href="../../mitK5defaults.html" title="MIT Kerberos defaults" 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__sserver">feedback</a> </div> </div> </div> <div class="content-wrapper"> <div class="content"> <div class="sidebar" style="float: right; background: #F9F9F9"> <h2>On this page </h2> <ul> <li><a class="reference internal" href="#">sserver</a><ul> <li><a class="reference internal" href="#synopsis">SYNOPSIS</a></li> <li><a class="reference internal" href="#description">DESCRIPTION</a></li> <li><a class="reference internal" href="#common-error-messages">COMMON ERROR MESSAGES</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"><a class="reference internal" href="../conf_files/index.html">Configuration Files</a></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 internal" href="../database.html">Database administration</a></li> <li class="toctree-l2"><a class="reference internal" href="../lockout.html">Account lockout</a></li> <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> <li class="toctree-l2"><a class="reference internal" href="../backup_host.html">Backups of secure hosts</a></li> <li class="toctree-l2"><a class="reference internal" href="../pkinit.html">PKINIT configuration</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 current"><a class="reference internal" href="index.html">Administration programs</a><ul class="current"> <li class="toctree-l3"><a class="reference internal" href="kadmin_local.html">kadmin</a></li> <li class="toctree-l3"><a class="reference internal" href="kadmind.html">kadmind</a></li> <li class="toctree-l3"><a class="reference internal" href="kdb5_util.html">kdb5_util</a></li> <li class="toctree-l3"><a class="reference internal" href="kdb5_ldap_util.html">kdb5_ldap_util</a></li> <li class="toctree-l3"><a class="reference internal" href="krb5kdc.html">krb5kdc</a></li> <li class="toctree-l3"><a class="reference internal" href="kprop.html">kprop</a></li> <li class="toctree-l3"><a class="reference internal" href="kpropd.html">kpropd</a></li> <li class="toctree-l3"><a class="reference internal" href="kproplog.html">kproplog</a></li> <li class="toctree-l3"><a class="reference internal" href="ktutil.html">ktutil</a></li> <li class="toctree-l3"><a class="reference internal" href="k5srvutil.html">k5srvutil</a></li> <li class="toctree-l3 current"><a class="current reference internal" href="">sserver</a></li> </ul> </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 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="../../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">The Kerberos Documentation Set</a></li> <li class="toctree-l1"><a class="reference internal" href="../../resources.html">Resources</a></li> </ul> <br/> <h4><a href="../../index.html">Full Table of Contents </a></h4> <h4>Search</h4> <form class="search" action="../../search.html" method="get"> <input type="text" name="q" size="18" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body"> <div class="section" id="sserver"> <span id="sserver-8"></span><h1>sserver<a class="headerlink" href="#sserver" title="Permalink to this headline">¶</a></h1> <div class="section" id="synopsis"> <h2>SYNOPSIS<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2> <p><strong>sserver</strong> [ <strong>-p</strong> <em>port</em> ] [ <strong>-S</strong> <em>keytab</em> ] [ <em>server_port</em> ]</p> </div> <div class="section" id="description"> <h2>DESCRIPTION<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2> <p>sserver and <a class="reference internal" href="../../user/user_commands/sclient.html#sclient-1"><em>sclient</em></a> are a simple demonstration client/server application. When sclient connects to sserver, it performs a Kerberos authentication, and then sserver returns to sclient the Kerberos principal which was used for the Kerberos authentication. It makes a good test that Kerberos has been successfully installed on a machine.</p> <p>The service name used by sserver and sclient is sample. Hence, sserver will require that there be a keytab entry for the service <tt class="docutils literal"><span class="pre">sample/hostname.domain.name@REALM.NAME</span></tt>. This keytab is generated using the <a class="reference internal" href="kadmin_local.html#kadmin-1"><em>kadmin</em></a> program. The keytab file is usually installed as <tt class="docutils literal"><span class="pre">FILE:/etc/krb5.keytab</span></tt>.</p> <p>The <strong>-S</strong> option allows for a different keytab than the default.</p> <p>sserver is normally invoked out of inetd(8), using a line in <tt class="docutils literal"><span class="pre">/etc/inetd.conf</span></tt> that looks like this:</p> <blockquote> <div><div class="highlight-python"><pre>sample stream tcp nowait root /usr/local/sbin/sserver sserver</pre> </div> </div></blockquote> <p>Since <tt class="docutils literal"><span class="pre">sample</span></tt> is normally not a port defined in <tt class="docutils literal"><span class="pre">/etc/services</span></tt>, you will usually have to add a line to <tt class="docutils literal"><span class="pre">/etc/services</span></tt> which looks like this:</p> <blockquote> <div><div class="highlight-python"><pre>sample 13135/tcp</pre> </div> </div></blockquote> <p>When using sclient, you will first have to have an entry in the Kerberos database, by using <a class="reference internal" href="kadmin_local.html#kadmin-1"><em>kadmin</em></a>, and then you have to get Kerberos tickets, by using <a class="reference internal" href="../../user/user_commands/kinit.html#kinit-1"><em>kinit</em></a>. Also, if you are running the sclient program on a different host than the sserver it will be connecting to, be sure that both hosts have an entry in /etc/services for the sample tcp port, and that the same port number is in both files.</p> <p>When you run sclient you should see something like this:</p> <blockquote> <div><div class="highlight-python"><pre>sendauth succeeded, reply is: reply len 32, contents: You are nlgilman@JIMI.MIT.EDU</pre> </div> </div></blockquote> </div> <div class="section" id="common-error-messages"> <h2>COMMON ERROR MESSAGES<a class="headerlink" href="#common-error-messages" title="Permalink to this headline">¶</a></h2> <ol class="arabic"> <li><p class="first">kinit returns the error:</p> <blockquote> <div><div class="highlight-python"><pre>kinit: Client not found in Kerberos database while getting initial credentials</pre> </div> </div></blockquote> <p>This means that you didn’t create an entry for your username in the Kerberos database.</p> </li> <li><p class="first">sclient returns the error:</p> <blockquote> <div><div class="highlight-python"><pre>unknown service sample/tcp; check /etc/services</pre> </div> </div></blockquote> <p>This means that you don’t have an entry in /etc/services for the sample tcp port.</p> </li> <li><p class="first">sclient returns the error:</p> <blockquote> <div><div class="highlight-python"><pre>connect: Connection refused</pre> </div> </div></blockquote> <p>This probably means you didn’t edit /etc/inetd.conf correctly, or you didn’t restart inetd after editing inetd.conf.</p> </li> <li><p class="first">sclient returns the error:</p> <blockquote> <div><div class="highlight-python"><pre>sclient: Server not found in Kerberos database while using sendauth</pre> </div> </div></blockquote> <p>This means that the <tt class="docutils literal"><span class="pre">sample/hostname@LOCAL.REALM</span></tt> service was not defined in the Kerberos database; it should be created using <a class="reference internal" href="kadmin_local.html#kadmin-1"><em>kadmin</em></a>, and a keytab file needs to be generated to make the key for that service principal available for sclient.</p> </li> <li><p class="first">sclient returns the error:</p> <blockquote> <div><div class="highlight-python"><pre>sendauth rejected, error reply is: "No such file or directory"</pre> </div> </div></blockquote> <p>This probably means sserver couldn’t find the keytab file. It was probably not installed in the proper directory.</p> </li> </ol> </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="../../user/user_commands/sclient.html#sclient-1"><em>sclient</em></a>, services(5), inetd(8)</p> </div> </div> </div> </div> </div> </div> <div class="clearer" ></div> </div> </div> <div class="footer-wrapper" > <div class="footer" > <div class="right" ><i>Release: 1.11.4</i><br /> © <a href="../../copyright.html">Copyright</a> 1985-2013, MIT. </div> <div class="left" > <a href="../../index.html" title="Full Table of Contents" >Contents</a> | <a href="k5srvutil.html" title="k5srvutil" >previous</a> | <a href="../../mitK5defaults.html" title="MIT Kerberos defaults" >next</a> | <a href="../../genindex.html" title="General Index" >index</a> | <a href="../../search.html" title="Enter search criteria" >Search</a> | <a href="mailto:krb5-bugs@mit.edu?subject=Documentation__sserver">feedback</a> </div> </div> </div> </body> </html>