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<title>mod_authn_core - Apache HTTP Server</title>
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<p class="apache">Apache HTTP Server Version 2.3</p>
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<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 2.3</a> > <a href="./">Modules</a></div>
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<div id="preamble"><h1>Apache Module mod_authn_core</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="/en/mod/mod_authn_core.html" title="English"> en </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Core Authentication</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>authn_core_module</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3 and later</td></tr></table>
<h3>Summary</h3>
<p>This module provides core authentication capabilities to
allow or deny access to portions of the web site.
<code class="module"><a href="/mod/mod_authn_core.html">mod_authn_core</a></code> provides directives that are
common to all authentication providers.</p>
</div>
<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="/images/down.gif" /> <a href="#authnprovideralias"><AuthnProviderAlias></a></li>
</ul>
<h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="/images/down.gif" /> <a href="#authnalias">Creating Authentication Provider Aliases</a></li>
</ul></div>
<div class="section">
<h2><a name="authnalias" id="authnalias">Creating Authentication Provider Aliases</a></h2>
<p>Extended authentication providers can 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>
<h3><a name="example" id="example">Example</a></h3>
<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>Example</h3><p><code>
<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 />
<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 />
require valid-user<br />
</span>
</Directory><br />
</code></p></div>
</div>
<div class="directive-section"><h2><a name="AuthName" id="AuthName">AuthName</a> <a name="authname" id="authname">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Authorization realm for use in HTTP
authentication</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthName <var>auth-domain</var></code></td></tr>
</table>
<p>This directive sets the name of the authorization realm for a
directory. This realm is given to the client so that the user
knows which username and password to send.
<code class="directive">AuthName</code> takes a single argument; if the
realm name contains spaces, it must be enclosed in quotation
marks. It must be accompanied by <code class="directive"><a href="#authtype">AuthType</a></code> and <code class="directive"><a href="/mod/mod_authz_core.html#require">Require</a></code> directives, and directives such
as <code class="directive"><a href="/mod/mod_authn_file.html#authuserfile">AuthUserFile</a></code> and
<code class="directive"><a href="/mod/mod_authz_groupfile.html#authgroupfile">AuthGroupFile</a></code> to
work.</p>
<p>For example:</p>
<div class="example"><p><code>
AuthName "Top Secret"
</code></p></div>
<p>The string provided for the <code>AuthName</code> is what will
appear in the password dialog provided by most browsers.</p>
<h3>See also</h3>
<ul>
Access Control</a></li>
</ul>
</div>
<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>
</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>
<div class="directive-section"><h2><a name="AuthType" id="AuthType">AuthType</a> <a name="authtype" id="authtype">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Type of user authentication</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthType Basic|Digest</code></td></tr>
</table>
<p>This directive selects the type of user authentication for a
directory. The authentication types available are
<code>Basic</code> (implemented by
<code class="module"><a href="/mod/mod_auth_basic.html">mod_auth_basic</a></code>) and <code>Digest</code>
(implemented by <code class="module"><a href="/mod/mod_auth_digest.html">mod_auth_digest</a></code>).</p>
<p>To implement authentication, you must also use the <code class="directive"><a href="#authname">AuthName</a></code> and <code class="directive"><a href="/mod/mod_authz_core.html#require">Require</a></code> directives. In addition, the
server must have an authentication-provider module such as
<code class="module"><a href="/mod/mod_authn_file.html">mod_authn_file</a></code> and an authorization module such
<h3>See also</h3>
<ul>
and Access Control</a></li>
</ul>
</div>
</div>
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<p><span>Available Languages: </span><a href="/en/mod/mod_authn_core.html" title="English"> en </a></p>
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