Newer
Older
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
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" />
<!--
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
This file is generated from xml source: DO NOT EDIT
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-->
<title>mod_authz_host - Apache HTTP Server Version 2.4</title>
<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" />
<script src="../style/scripts/prettify.min.js" type="text/javascript">
</script>
<link href="../images/favicon.ico" rel="shortcut icon" /></head>
<body>
<div id="page-header">
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
<p class="apache">Apache HTTP Server Version 2.4</p>
<img alt="" src="../images/feather.png" /></div>
<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
<div id="path">
<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div>
<div id="page-content">
<div id="preamble"><h1>Apache Module mod_authz_host</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_authz_host.html" title="English"> en </a> |
<a href="../fr/mod/mod_authz_host.html" hreflang="fr" rel="alternate" title="Franais"> fr </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Group authorizations based on host (name or IP
address)</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">ModuleIdentifier:</a></th><td>authz_host_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">SourceFile:</a></th><td>mod_authz_host.c</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>The <code>forward-dns</code> provider was addded in 2.4.19</td></tr></table>
<h3>Summary</h3>
<p>The authorization providers implemented by <code class="module"><a href="../mod/mod_authz_host.html">mod_authz_host</a></code> are
registered using the <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code>
directive. The directive can be referenced within a
<code class="directive"><a href="../mod/core.html#directory"><Directory></a></code>,
<code class="directive"><a href="../mod/core.html#files"><Files></a></code>,
or <code class="directive"><a href="../mod/core.html#location"><Location></a></code> section
as well as <code><a href="core.html#accessfilename">.htaccess</a>
</code> files to control access to particular parts of the server.
Access can be controlled based on the client hostname or IP address.</p>
<p>In general, access restriction directives apply to all
access methods (<code>GET</code>, <code>PUT</code>,
<code>POST</code>, etc). This is the desired behavior in most
cases. However, it is possible to restrict some methods, while
leaving other methods unrestricted, by enclosing the directives
in a <code class="directive"><a href="../mod/core.html#limit"><Limit></a></code> section.</p>
</div>
<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#requiredirectives">The Require Directives</a></li>
</ul><h3 class="directives">Directives</h3>
<p>This module provides no
directives.</p>
<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_authz_host">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_authz_host">Report a bug</a></li></ul><h3>See also</h3>
<ul class="seealso">
<li><a href="../howto/auth.html">Authentication, Authorization,
and Access Control</a></li>
<li><code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code></li>
<li><a href="#comments_section">Comments</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="requiredirectives" id="requiredirectives">The Require Directives</a></h2>
<p>Apache's <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code>
directive is used during the authorization phase to ensure that a user is allowed or
denied access to a resource. mod_authz_host extends the
authorization types with <code>ip</code>, <code>host</code>,
<code>forward-dns</code> and <code>local</code>.
Other authorization types may also be
used but may require that additional authorization modules be loaded.</p>
<p>These authorization providers affect which hosts can
access an area of the server. Access can be controlled by
hostname, IP Address, or IP Address range.</p>
<p>Since v2.4.8, <a href="../expr.html">expressions</a> are supported
within the host require directives.</p>
<h3><a name="reqip" id="reqip">Require ip</a></h3>
<p>The <code>ip</code> provider allows access to the server
to be controlled based on the IP address of the remote client.
When <code>Require ip <var>ip-address</var></code> is specified,
then the request is allowed access if the IP address matches.</p>
<p>A full IP address:</p>
<pre class="prettyprint lang-config">Require ip 10.1.2.3
Require ip 192.168.1.104 192.168.1.205</pre>
<p>An IP address of a host allowed access</p>
<p>A partial IP address:</p>
<pre class="prettyprint lang-config">Require ip 10.1
Require ip 10 172.20 192.168.2</pre>
<p>The first 1 to 3 bytes of an IP address, for subnet
restriction.</p>
<p>A network/netmask pair:</p>
<pre class="prettyprint lang-config">Require ip 10.1.0.0/255.255.0.0</pre>
<p>A network a.b.c.d, and a netmask w.x.y.z. For more
fine-grained subnet restriction.</p>
<p>A network/nnn CIDR specification:</p>
<pre class="prettyprint lang-config">Require ip 10.1.0.0/16</pre>
<p>Similar to the previous case, except the netmask consists of
nnn high-order 1 bits.</p>
<p>Note that the last three examples above match exactly the
same set of hosts.</p>
<p>IPv6 addresses and IPv6 subnets can be specified as shown
below:</p>
<pre class="prettyprint lang-config">Require ip 2001:db8::a00:20ff:fea7:ccea
Require ip 2001:db8:1:1::a
Require ip 2001:db8:2:1::/64
Require ip 2001:db8:3::/48</pre>
<p>Note: As the IP addresses are parsed on startup, expressions are
not evaluated at request time.</p>
<h3><a name="reqhost" id="reqhost">Require host</a></h3>
<p>The <code>host</code> provider allows access to the server
to be controlled based on the host name of the remote client.
When <code>Require host <var>host-name</var></code> is specified,
then the request is allowed access if the host name matches.</p>
<p>A (partial) domain-name</p>
<pre class="prettyprint lang-config">Require host example.org
Require host .net example.edu</pre>
<p>Hosts whose names match, or end in, this string are allowed
access. Only complete components are matched, so the above
example will match <code>foo.example.org</code> but it will not
match <code>fooexample.org</code>. This configuration will cause
Apache to perform a double reverse DNS lookup on the client IP
address, regardless of the setting of the <code class="directive"><a href="../mod/core.html#hostnamelookups">HostnameLookups</a></code> directive. It will do
a reverse DNS lookup on the IP address to find the associated
hostname, and then do a forward lookup on the hostname to assure
that it matches the original IP address. Only if the forward
and reverse DNS are consistent and the hostname matches will
access be allowed.</p>
<h3><a name="reqfwddns" id="reqfwddns">Require forward-dns</a></h3>
<p>The <code>forward-dns</code> provider allows access to the server
to be controlled based on simple host names. When
<code>Require forward-dns <var>host-name</var></code> is specified,
all IP addresses corresponding to <code><var>host-name</var></code>
are allowed access.</p>
<p>In contrast to the <code>host</code> provider, this provider does not
rely on reverse DNS lookups: it simply queries the DNS for the host name
and allows a client if its IP matches. As a consequence, it will only
work with host names, not domain names. However, as the reverse DNS is
not used, it will work with clients which use a dynamic DNS service.</p>
<pre class="prettyprint lang-config">Require forward-dns bla.example.org</pre>
<p>A client the IP of which is resolved from the name
<code>bla.example.org</code> will be granted access.</p>
<p>The <code>forward-dns</code> provider was added in 2.4.19.</p>
<h3><a name="reqlocal" id="reqlocal">Require local</a></h3>
<p>The <code>local</code> provider allows access to the server if any
of the following conditions is true:</p>
<ul>
<li>the client address matches 127.0.0.0/8</li>
<li>the client address is ::1</li>
<li>both the client and the server address of the connection are
the same</li>
</ul>
<p>This allows a convenient way to match connections that originate from
the local host:</p>
<pre class="prettyprint lang-config">Require local</pre>
<h3><a name="proxy" id="proxy">Security Note</a></h3>
<p>If you are proxying content to your server, you need to be aware
that the client address will be the address of your proxy server,
not the address of the client, and so using the <code>Require</code>
directive in this context may not do what you mean. See
<code class="module"><a href="../mod/mod_remoteip.html">mod_remoteip</a></code> for one possible solution to this
problem.</p>
</div>
</div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/mod/mod_authz_host.html" title="English"> en </a> |
<a href="../fr/mod/mod_authz_host.html" hreflang="fr" rel="alternate" title="Franais"> fr </a></p>
</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
<script type="text/javascript"><!--//--><![CDATA[//><!--
var comments_shortname = 'httpd';
var comments_identifier = 'http://httpd.apache.org/docs/2.4/mod/mod_authz_host.html';
(function(w, d) {
if (w.location.hostname.toLowerCase() == "httpd.apache.org") {
d.write('<div id="comments_thread"><\/div>');
var s = d.createElement('script');
s.type = 'text/javascript';
s.async = true;
s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
(d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
}
else {
d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>');
}
})(window, document);
//--><!]]></script></div><div id="footer">
<p class="apache">Copyright 2017 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!--
if (typeof(prettyPrint) !== 'undefined') {
prettyPrint();
}
//--><!]]></script>
</body></html>