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<!DOCTYPE html SYSTEM "about:legacy-compat"> <html lang="en"><head><META http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta content="width=device-width, initial-scale=1" name="viewport"> <!-- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --> <title>mod_authn_core - 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"> </script> <link href="../../images/favicon.png" rel="shortcut icon"></head> <body> <div id="page-header"> <p class="menu"><a href="../mod/index.html">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="https://cwiki.apache.org/confluence/display/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a> | <a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2">Report a bug</a></p> <p class="apache">Apache HTTP Server Version 2.4</p> <img alt="" src="../../images/feather.png"></div> <div class="up"><a href="./index.html"><img title="<-" alt="<-" src="../../images/left.gif"></a></div> <div id="path"> <a href="https://www.apache.org/">Apache</a> > <a href="https://httpd.apache.org/">HTTP Server</a> > <a href="https://httpd.apache.org/docs/">Documentation</a> > <a href="../index.html">Version 2.4</a> > <a href="./index.html">Modules</a></div> <div id="page-content"> <div id="preamble"><h1>Apache Module mod_authn_core</h1> <button aria-label="Toggle language list" class="lang-toggle"><svg xmlns="http://www.w3.org/2000/svg" stroke-width="2" stroke="currentColor" fill="none" viewBox="0 0 24 24" height="16" width="16"><circle r="10" cy="12" cx="12"/><line y2="12" x2="22" y1="12" x1="2"/><path d="M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z"/></svg></button> <div class="toplang"> <p><span>Available Languages: </span><a href="../../en/mod/mod_authn_core.html" title="English"> en </a> | <a href="../../fr/mod/mod_authn_core.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>Core Authentication</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">Module Identifier:</a></th><td>authn_core_module</td></tr> <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authn_core.c</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>Topics</h3> <ul id="topics"> <li><img alt="" src="../../images/down.gif"> <a href="#authnalias">Creating Authentication Provider Aliases</a></li> </ul><h3 class="directives">Directives</h3> <ul id="toc"> <li><img alt="" src="../../images/down.gif"> <a href="#authname">AuthName</a></li> <li><img alt="" src="../../images/down.gif"> <a href="#authnprovideralias"><AuthnProviderAlias></a></li> <li><img alt="" src="../../images/down.gif"> <a href="#authtype">AuthType</a></li> </ul> <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_authn_core">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_authn_core">Report a bug</a></li></ul></div> <div class="top"><a href="#page-header"><img alt="top" src="../../images/up.gif"></a></div> <div class="section"> <h2 id="authnalias">Creating Authentication Provider Aliases <a title="Permanent link" href="#authnalias" class="permalink">¶</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 id="example">Examples</h3> <p>This example checks for passwords in two different text files.</p> <div class="example"><h3>Checking multiple text password files</h3><pre class="prettyprint lang-config"># Check here first <AuthnProviderAlias file file1> AuthUserFile "/www/conf/passwords1" </AuthnProviderAlias> # Then check here <AuthnProviderAlias file file2> AuthUserFile "/www/conf/passwords2" </AuthnProviderAlias> <Directory "/var/web/pages/secure"> AuthBasicProvider file1 file2 AuthType Basic AuthName "Protected Area" Require valid-user </Directory></pre> </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><pre class="prettyprint lang-config"><AuthnProviderAlias ldap ldap-alias1> AuthLDAPBindDN cn=youruser,o=ctx AuthLDAPBindPassword yourpassword AuthLDAPURL ldap://ldap.host/o=ctx </AuthnProviderAlias> <AuthnProviderAlias ldap ldap-other-alias> AuthLDAPBindDN cn=yourotheruser,o=dev AuthLDAPBindPassword yourotherpassword AuthLDAPURL ldap://other.ldap.host/o=dev?cn </AuthnProviderAlias> Alias "/secure" "/webpages/secure" <Directory "/webpages/secure"> AuthBasicProvider ldap-other-alias ldap-alias1 AuthType Basic AuthName "LDAP Protected Place" Require valid-user # Note that Require ldap-* would not work here, since the # AuthnProviderAlias does not provide the config to authorization providers # that are implemented in the same module as the authentication provider. </Directory></pre> </div> </div> <div class="top"><a href="#page-header"><img alt="top" src="../../images/up.gif"></a></div> <div class="directive-section"><h2 id="authname"><span id="AuthName">AuthName</span> Directive <a title="Permanent link" href="#authname" class="permalink">¶</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> <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr> <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr> <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_core</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> <pre class="prettyprint lang-config">AuthName "Top Secret"</pre> <p>The string provided for the <code>AuthName</code> was historically displayed in the password dialog provided by browsers. Most modern browsers no longer show the realm string, as it could be abused for phishing. The directive is still required for HTTP authentication to function, and the realm value is still used to scope credentials.</p> <p>From 2.4.55, <a href="../expr.html">expression syntax</a> can be used inside the directive to produce the name dynamically.</p> <p>For example:</p> <pre class="prettyprint lang-config">AuthName "%{HTTP_HOST}"</pre> <h3>See also</h3> <ul> <li><a href="../howto/auth.html">Authentication, Authorization, and Access Control</a></li> <li><code class="module"><a href="../mod/mod_authz_core.html">mod_authz_core</a></code></li> </ul> </div> <div class="top"><a href="#page-header"><img alt="top" src="../../images/up.gif"></a></div> <div class="directive-section"><h2 id="authnprovideralias"><span id="AuthnProviderAlias"><AuthnProviderAlias></span> Directive <a title="Permanent link" href="#authnprovideralias" class="permalink">¶</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>Base</td></tr> <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_core</td></tr> </table> <p><code><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 class="top"><a href="#page-header"><img alt="top" src="../../images/up.gif"></a></div> <div class="directive-section"><h2 id="authtype"><span id="AuthType">AuthType</span> Directive <a title="Permanent link" href="#authtype" class="permalink">¶</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 None|Basic|Digest|Form</code></td></tr> <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr> <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr> <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_core</td></tr> </table> <p>This directive selects the type of user authentication for a directory. The authentication types available are <code>None</code>, <code>Basic</code> (implemented by <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code>), <code>Digest</code> (implemented by <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>), and <code>Form</code> (implemented by <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</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 as <code class="module"><a href="../mod/mod_authz_user.html">mod_authz_user</a></code>.</p> <p>The authentication type <code>None</code> disables authentication. When authentication is enabled, it is normally inherited by each subsequent <a href="../sections.html#merging">configuration section</a>, unless a different authentication type is specified. If no authentication is desired for a subsection of an authenticated section, the authentication type <code>None</code> may be used; in the following example, clients may access the <code>/www/docs/public</code> directory without authenticating:</p> <pre class="prettyprint lang-config"><Directory "/www/docs"> AuthType Basic AuthName Documents AuthBasicProvider file AuthUserFile "/usr/local/apache/passwd/passwords" Require valid-user </Directory> <Directory "/www/docs/public"> AuthType None Require all granted </Directory></pre> <p>From 2.4.55, <a href="../expr.html">expression syntax</a> can be used inside the directive to specify the type dynamically.</p> <div class="note">When disabling authentication, note that clients which have already authenticated against another portion of the server's document tree will typically continue to send authentication HTTP headers or cookies with each request, regardless of whether the server actually requires authentication for every resource.</div> <h3>See also</h3> <ul> <li><a href="../howto/auth.html">Authentication, Authorization, and Access Control</a></li> </ul> </div> </div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../../en/mod/mod_authn_core.html" title="English"> en </a> | <a href="../../fr/mod/mod_authn_core.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> </div><div id="footer"> <p class="apache">Copyright 2026 The Apache Software Foundation.<br>Licensed under the <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> <p class="menu"><a href="../mod/index.html">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="https://cwiki.apache.org/confluence/display/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a> | <a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2">Report a bug</a></p></div><script><!--//--><![CDATA[//><!-- if (typeof(prettyPrint) !== 'undefined') { prettyPrint(); } var langToggle = document.querySelector('.lang-toggle'); var topLang = document.querySelector('.toplang'); if (langToggle && topLang) { langToggle.addEventListener('click', function() { topLang.classList.toggle('open'); }); } var qv = document.getElementById('quickview'); if (qv) { document.body.appendChild(qv); var qvBtn = document.createElement('button'); qvBtn.className = 'qv-toggle'; qvBtn.setAttribute('aria-label', 'Toggle page navigation'); qvBtn.innerHTML = '☰'; document.body.appendChild(qvBtn); qvBtn.addEventListener('click', function() { var isOpen = qv.classList.toggle('open'); if (isOpen) { qv.style.top = window.scrollY + 10 + 'px'; } }); window.addEventListener('scroll', function() { qv.classList.remove('open'); }); } //--><!]]></script> </body></html>