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<title>mod_authn_alias - Apache HTTP Server Version 2.2</title>
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<p class="apache">Apache HTTP Server Version 2.2</p>
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<div class="retired"><h4>Please note</h4>
<p>This document refers to the <strong>2.2</strong> version of Apache httpd, which is no longer maintained. The active release is documented <a href="http://httpd.apache.org/docs/current">here</a>. If you have not already upgraded, please follow <a href="http://httpd.apache.org/docs/current/upgrading.html">this link</a> for more information.</p>
<p>You may follow <a href="http://httpd.apache.org/docs/current/mod/mod_authn_alias.html">this link</a> to go to the current version of this document.</p></div><div id="preamble"><h1>Apache Module mod_authn_alias</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_authn_alias.html" title="English"> en </a> |
<a href="../fr/mod/mod_authn_alias.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Provides the ability to create extended authentication
providers based on actual providers</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>authn_alias_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authn_alias.c</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.1 and later</td></tr></table>
<h3>Summary</h3>
<p>This module allows extended authentication providers to be created
within the configuration file and assigned an alias name. The alias
providers can then be referenced through the directives
<code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> or
<code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code> in
the same way as a base authentication provider. Besides the ability
to create and alias an extended provider, it also allows the same
extended authentication provider to be reference by multiple
locations.</p>
</div>
<div id="quickview"><h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#example">Examples</a></li>
</ul><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#authnprovideralias"><AuthnProviderAlias></a></li>
</ul>
<ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
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<div class="section">
<h2><a name="example" id="example">Examples</a></h2>
<p>This example checks for passwords in two different text
files.</p>
<div class="example"><h3>Checking multiple text password files</h3><p><code>
# Check here first<br />
<AuthnProviderAlias file file1><br />
<span class="indent">
AuthUserFile /www/conf/passwords1<br />
</span>
</AuthnProviderAlias><br />
<br />
# Then check here<br />
<AuthnProviderAlias file file2> <br />
<span class="indent">
AuthUserFile /www/conf/passwords2<br />
</span>
</AuthnProviderAlias><br />
<br />
<Directory /var/web/pages/secure><br />
<span class="indent">
AuthBasicProvider file1 file2<br />
<br />
AuthType Basic<br />
AuthName "Protected Area"<br />
Require valid-user<br />
</span>
</Directory><br />
</code></p></div>
<p>The example below creates two different ldap authentication
provider aliases based on the ldap provider. This allows
a single authenticated location to be serviced by multiple ldap
hosts:</p>
<div class="example"><h3>Checking multiple LDAP servers</h3><p><code>
LoadModule authn_alias_module modules/mod_authn_alias.so<br /><br />
<AuthnProviderAlias ldap ldap-alias1><br />
<span class="indent">
AuthLDAPBindDN cn=youruser,o=ctx<br />
AuthLDAPBindPassword yourpassword<br />
AuthLDAPURL ldap://ldap.host/o=ctx<br />
</span>
</AuthnProviderAlias><br /><br />
<AuthnProviderAlias ldap ldap-other-alias><br />
<span class="indent">
AuthLDAPBindDN cn=yourotheruser,o=dev<br />
AuthLDAPBindPassword yourotherpassword<br />
AuthLDAPURL ldap://other.ldap.host/o=dev?cn<br />
</span>
</AuthnProviderAlias><br /><br />
Alias /secure /webpages/secure<br />
<Directory /webpages/secure><br />
<span class="indent">
Order deny,allow<br />
Allow from all<br /><br />
AuthBasicProvider ldap-other-alias ldap-alias1<br /><br />
AuthType Basic<br />
AuthName LDAP_Protected_Place<br />
AuthzLDAPAuthoritative off<br />
Require valid-user<br />
</span>
</Directory><br />
</code></p></div>
</div>
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<div class="directive-section"><h2><a name="AuthnProviderAlias" id="AuthnProviderAlias"><AuthnProviderAlias></a> <a name="authnprovideralias" id="authnprovideralias">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enclose a group of directives that represent an
extension of a base authentication provider and referenced by
the specified alias</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><AuthnProviderAlias <var>baseProvider Alias</var>>
... </AuthnProviderAlias></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_alias</td></tr>
</table>
<p><code class="directive"><AuthnProviderAlias></code> and
<code></AuthnProviderAlias></code> are used to enclose a group of
authentication directives that can be referenced by the alias name
using one of the directives <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">
AuthBasicProvider</a></code> or <code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">
AuthDigestProvider</a></code>.</p>
<div class="note">This directive has no affect on authorization, even for modules that
provide both authentication and authorization.</div>
</div>
</div>
<div class="bottomlang">
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</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>
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