1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
|
<!DOCTYPE html>
<html lang="en" data-content_root="../../">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="viewport" content="width=device-width, initial-scale=1" />
<title>sserver — MIT Kerberos Documentation</title>
<link rel="stylesheet" type="text/css" href="../../_static/pygments.css?v=fa44fd50" />
<link rel="stylesheet" type="text/css" href="../../_static/agogo.css?v=879f3c71" />
<link rel="stylesheet" type="text/css" href="../../_static/kerb.css?v=6a0b3979" />
<script src="../../_static/documentation_options.js?v=236fef3b"></script>
<script src="../../_static/doctools.js?v=888ff710"></script>
<script src="../../_static/sphinx_highlight.js?v=dc90522c"></script>
<link rel="author" title="About these documents" href="../../about.html" />
<link rel="index" title="Index" href="../../genindex.html" />
<link rel="search" title="Search" href="../../search.html" />
<link rel="copyright" title="Copyright" href="../../copyright.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">
<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="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="document">
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body" role="main">
<section id="sserver">
<span id="sserver-8"></span><h1>sserver<a class="headerlink" href="#sserver" title="Link to this heading">¶</a></h1>
<section id="synopsis">
<h2>SYNOPSIS<a class="headerlink" href="#synopsis" title="Link to this heading">¶</a></h2>
<p><strong>sserver</strong>
[ <strong>-p</strong> <em>port</em> ]
[ <strong>-S</strong> <em>keytab</em> ]
[ <em>server_port</em> ]</p>
</section>
<section id="description">
<h2>DESCRIPTION<a class="headerlink" href="#description" title="Link to this heading">¶</a></h2>
<p>sserver and <a class="reference internal" href="../../user/user_commands/sclient.html#sclient-1"><span class="std std-ref">sclient</span></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
<code class="docutils literal notranslate"><span class="pre">sample/hostname.domain.name@REALM.NAME</span></code>. This keytab is generated
using the <a class="reference internal" href="kadmin_local.html#kadmin-1"><span class="std std-ref">kadmin</span></a> program. The keytab file is usually
installed as <a class="reference internal" href="../../mitK5defaults.html#paths"><span class="std std-ref">DEFKTNAME</span></a>.</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
<code class="docutils literal notranslate"><span class="pre">/etc/inetd.conf</span></code> that looks like this:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sample</span> <span class="n">stream</span> <span class="n">tcp</span> <span class="n">nowait</span> <span class="n">root</span> <span class="o">/</span><span class="n">usr</span><span class="o">/</span><span class="n">local</span><span class="o">/</span><span class="n">sbin</span><span class="o">/</span><span class="n">sserver</span> <span class="n">sserver</span>
</pre></div>
</div>
<p>Since <code class="docutils literal notranslate"><span class="pre">sample</span></code> is normally not a port defined in <code class="docutils literal notranslate"><span class="pre">/etc/services</span></code>,
you will usually have to add a line to <code class="docutils literal notranslate"><span class="pre">/etc/services</span></code> which looks
like this:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sample</span> <span class="mi">13135</span><span class="o">/</span><span class="n">tcp</span>
</pre></div>
</div>
<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"><span class="std std-ref">kadmin</span></a>, and then you have to get
Kerberos tickets, by using <a class="reference internal" href="../../user/user_commands/kinit.html#kinit-1"><span class="std std-ref">kinit</span></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>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sendauth</span> <span class="n">succeeded</span><span class="p">,</span> <span class="n">reply</span> <span class="ow">is</span><span class="p">:</span>
<span class="n">reply</span> <span class="nb">len</span> <span class="mi">32</span><span class="p">,</span> <span class="n">contents</span><span class="p">:</span>
<span class="n">You</span> <span class="n">are</span> <span class="n">nlgilman</span><span class="nd">@JIMI</span><span class="o">.</span><span class="n">MIT</span><span class="o">.</span><span class="n">EDU</span>
</pre></div>
</div>
</section>
<section id="common-error-messages">
<h2>COMMON ERROR MESSAGES<a class="headerlink" href="#common-error-messages" title="Link to this heading">¶</a></h2>
<ol class="arabic">
<li><p>kinit returns the error:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">kinit</span><span class="p">:</span> <span class="n">Client</span> <span class="ow">not</span> <span class="n">found</span> <span class="ow">in</span> <span class="n">Kerberos</span> <span class="n">database</span> <span class="k">while</span> <span class="n">getting</span>
<span class="n">initial</span> <span class="n">credentials</span>
</pre></div>
</div>
<p>This means that you didn’t create an entry for your username in the
Kerberos database.</p>
</li>
<li><p>sclient returns the error:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">unknown</span> <span class="n">service</span> <span class="n">sample</span><span class="o">/</span><span class="n">tcp</span><span class="p">;</span> <span class="n">check</span> <span class="o">/</span><span class="n">etc</span><span class="o">/</span><span class="n">services</span>
</pre></div>
</div>
<p>This means that you don’t have an entry in /etc/services for the
sample tcp port.</p>
</li>
<li><p>sclient returns the error:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">connect</span><span class="p">:</span> <span class="n">Connection</span> <span class="n">refused</span>
</pre></div>
</div>
<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>sclient returns the error:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sclient</span><span class="p">:</span> <span class="n">Server</span> <span class="ow">not</span> <span class="n">found</span> <span class="ow">in</span> <span class="n">Kerberos</span> <span class="n">database</span> <span class="k">while</span> <span class="n">using</span>
<span class="n">sendauth</span>
</pre></div>
</div>
<p>This means that the <code class="docutils literal notranslate"><span class="pre">sample/hostname@LOCAL.REALM</span></code> service was not
defined in the Kerberos database; it should be created using
<a class="reference internal" href="kadmin_local.html#kadmin-1"><span class="std std-ref">kadmin</span></a>, and a keytab file needs to be generated to make
the key for that service principal available for sclient.</p>
</li>
<li><p>sclient returns the error:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sendauth</span> <span class="n">rejected</span><span class="p">,</span> <span class="n">error</span> <span class="n">reply</span> <span class="ow">is</span><span class="p">:</span>
<span class="s2">"No such file or directory"</span>
</pre></div>
</div>
<p>This probably means sserver couldn’t find the keytab file. It was
probably not installed in the proper directory.</p>
</li>
</ol>
</section>
<section id="environment">
<h2>ENVIRONMENT<a class="headerlink" href="#environment" title="Link to this heading">¶</a></h2>
<p>See <a class="reference internal" href="../../user/user_config/kerberos.html#kerberos-7"><span class="std std-ref">kerberos</span></a> for a description of Kerberos environment
variables.</p>
</section>
<section id="see-also">
<h2>SEE ALSO<a class="headerlink" href="#see-also" title="Link to this heading">¶</a></h2>
<p><a class="reference internal" href="../../user/user_commands/sclient.html#sclient-1"><span class="std std-ref">sclient</span></a>, <a class="reference internal" href="../../user/user_config/kerberos.html#kerberos-7"><span class="std std-ref">kerberos</span></a>, services(5), inetd(8)</p>
</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="#">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="#environment">ENVIRONMENT</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="../dbtypes.html">Database types</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="../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 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="../../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>
</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="clearer"></div>
</div>
</div>
<div class="footer-wrapper">
<div class="footer" >
<div class="right" ><i>Release: 1.22-final</i><br />
© <a href="../../copyright.html">Copyright</a> 1985-2025, 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>
|
