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<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">&nbsp;en&nbsp;</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 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#authnprovideralias">&lt;AuthnProviderAlias&gt;</a></li>
</ul>
<h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#example">Examples</a></li>
</ul></div>
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<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 />
        &lt;AuthnProviderAlias file file1&gt;<br />
        <span class="indent">
            AuthUserFile /www/conf/passwords1<br />
        </span>
        &lt;/AuthnProviderAlias&gt;<br />
        <br />
        # Then check here<br />
        &lt;AuthnProviderAlias file file2&gt;   <br />
        <span class="indent">
            AuthUserFile /www/conf/passwords2<br />
        </span>
        &lt;/AuthnProviderAlias&gt;<br />
        <br />
        &lt;Directory /var/web/pages/secure&gt;<br />
        <span class="indent">
            AuthBasicProvider file1 file2<br />
            <br />
            AuthType Basic<br />
            AuthName "Protected Area"<br />
            Require valid-user<br />
        </span>
        &lt;/Directory&gt;<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 />
      &lt;AuthnProviderAlias ldap ldap-alias1&gt;<br />
      <span class="indent">
         AuthLDAPBindDN cn=youruser,o=ctx<br />
         AuthLDAPBindPassword yourpassword<br />
         AuthLDAPURL ldap://ldap.host/o=ctx<br />
      </span>
      &lt;/AuthnProviderAlias&gt;<br /><br />
      &lt;AuthnProviderAlias ldap ldap-other-alias&gt;<br />
      <span class="indent">
         AuthLDAPBindDN cn=yourotheruser,o=dev<br />
         AuthLDAPBindPassword yourotherpassword<br />
         AuthLDAPURL ldap://other.ldap.host/o=dev?cn<br />
      </span>
      &lt;/AuthnProviderAlias&gt;<br /><br />

      Alias /secure /webpages/secure<br />
      &lt;Directory /webpages/secure&gt;<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>
      &lt;/Directory&gt;<br />
    </code></p></div>
</div>
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<div class="directive-section"><h2><a name="AuthnProviderAlias" id="AuthnProviderAlias">&lt;AuthnProviderAlias&gt;</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>&lt;AuthnProviderAlias <var>baseProvider Alias</var>&gt;
... &lt;/AuthnProviderAlias&gt;</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">&lt;AuthnProviderAlias&gt;</code> and
    <code>&lt;/AuthnProviderAlias&gt;</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#&#10;    authbasicprovider">
    AuthBasicProvider</a></code> or <code class="directive"><a href="../mod/mod_auth_digest.html#&#10;    authdigestprovider">
    AuthDigestProvider</a></code>.</p>


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