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
|
<!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>HTTPS proxy configuration — 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="For administrators" href="index.html" />
<link rel="next" title="Authentication indicators" href="auth_indicator.html" />
<link rel="prev" title="Encryption types" href="enctypes.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="enctypes.html" title="Encryption types"
accesskey="P">previous</a> |
<a href="auth_indicator.html" title="Authentication indicators"
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__HTTPS proxy configuration">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="https-proxy-configuration">
<span id="https"></span><h1>HTTPS proxy configuration<a class="headerlink" href="#https-proxy-configuration" title="Permalink to this headline">¶</a></h1>
<p>In addition to being able to use UDP or TCP to communicate directly
with a KDC as is outlined in RFC4120, and with kpasswd services in a
similar fashion, the client libraries can attempt to use an HTTPS
proxy server to communicate with a KDC or kpasswd service, using the
protocol outlined in [MS-KKDCP].</p>
<p>Communicating with a KDC through an HTTPS proxy allows clients to
contact servers when network firewalls might otherwise prevent them
from doing so. The use of TLS also encrypts all traffic between the
clients and the KDC, preventing observers from conducting password
dictionary attacks or from observing the client and server principals
being authenticated, at additional computational cost to both clients
and servers.</p>
<p>An HTTPS proxy server is provided as a feature in some versions of
Microsoft Windows Server, and a WSGI implementation named <cite>kdcproxy</cite>
is available in the python package index.</p>
<div class="section" id="configuring-the-clients">
<h2>Configuring the clients<a class="headerlink" href="#configuring-the-clients" title="Permalink to this headline">¶</a></h2>
<p>To use an HTTPS proxy, a client host must trust the CA which issued
that proxy’s SSL certificate. If that CA’s certificate is not in the
system-wide default set of trusted certificates, configure the
following relation in the client host’s <a class="reference internal" href="conf_files/krb5_conf.html#krb5-conf-5"><em>krb5.conf</em></a> file in
the appropriate <a class="reference internal" href="conf_files/krb5_conf.html#realms"><em>[realms]</em></a> subsection:</p>
<div class="highlight-python"><div class="highlight"><pre>http_anchors = FILE:/etc/krb5/cacert.pem
</pre></div>
</div>
<p>Adjust the pathname to match the path of the file which contains a
copy of the CA’s certificate. The <cite>http_anchors</cite> option is documented
more fully in <a class="reference internal" href="conf_files/krb5_conf.html#krb5-conf-5"><em>krb5.conf</em></a>.</p>
<p>Configure the client to access the KDC and kpasswd service by
specifying their locations in its <a class="reference internal" href="conf_files/krb5_conf.html#krb5-conf-5"><em>krb5.conf</em></a> file in the form
of HTTPS URLs for the proxy server:</p>
<div class="highlight-python"><div class="highlight"><pre>kdc = https://server.fqdn/KdcProxy
kpasswd_server = https://server.fqdn/KdcProxy
</pre></div>
</div>
<p>If the proxy and client are properly configured, client commands such
as <tt class="docutils literal"><span class="pre">kinit</span></tt>, <tt class="docutils literal"><span class="pre">kvno</span></tt>, and <tt class="docutils literal"><span class="pre">kpasswd</span></tt> should all function normally.</p>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="sidebar">
<h2>On this page</h2>
<ul>
<li><a class="reference internal" href="#">HTTPS proxy configuration</a><ul>
<li><a class="reference internal" href="#configuring-the-clients">Configuring the clients</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="otp.html">OTP Preauthentication</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="current reference internal" href="">HTTPS proxy configuration</a><ul class="simple">
</ul>
</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 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: 1.15.1</i><br />
© <a href="../copyright.html">Copyright</a> 1985-2017, MIT.
</div>
<div class="left">
<a href="../index.html" title="Full Table of Contents"
>Contents</a> |
<a href="enctypes.html" title="Encryption types"
>previous</a> |
<a href="auth_indicator.html" title="Authentication indicators"
>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__HTTPS proxy configuration">feedback</a>
</div>
</div>
</div>
</body>
</html>
|
