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diff --git a/docs/manual/mod/mod_authnz_ldap.html.en b/docs/manual/mod/mod_authnz_ldap.html.en new file mode 100644 index 0000000..b4e3806 --- /dev/null +++ b/docs/manual/mod/mod_authnz_ldap.html.en @@ -0,0 +1,1426 @@ +<?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_authnz_ldap - 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" 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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_authnz_ldap</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_authnz_ldap.html" title="English"> en </a> | +<a href="../fr/mod/mod_authnz_ldap.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>Allows an LDAP directory to be used to store the database +for HTTP Basic authentication.</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>authnz_ldap_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authnz_ldap.c</td></tr> +<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.1 and later</td></tr></table> +<h3>Summary</h3> + + <p>This module allows authentication front-ends such as + <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> to authenticate users through + an ldap directory.</p> + + <p><code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> supports the following features:</p> + + <ul> + <li>Known to support the <a href="http://www.openldap.org/">OpenLDAP SDK</a> (both 1.x + and 2.x), <a href="http://developer.novell.com/ndk/cldap.htm"> + Novell LDAP SDK</a> and the <a href="http://www.iplanet.com/downloads/developer/">iPlanet + (Netscape)</a> SDK.</li> + + <li>Complex authorization policies can be implemented by + representing the policy with LDAP filters.</li> + + <li>Uses extensive caching of LDAP operations via <a href="mod_ldap.html">mod_ldap</a>.</li> + + <li>Support for LDAP over SSL (requires the Netscape SDK) or + TLS (requires the OpenLDAP 2.x SDK or Novell LDAP SDK).</li> + </ul> + + <p>When using <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code>, this module is invoked + via the <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> + directive with the <code>ldap</code> value.</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="#contents">Contents</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#gcaveats">General caveats</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#operation">Operation</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#requiredirectives">The Require Directives</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#usingtls">Using TLS</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#usingssl">Using SSL</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#exposed">Exposing Login Information</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#activedirectory">Using Active Directory</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#frontpage">Using Microsoft + FrontPage with mod_authnz_ldap</a></li> +</ul><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapauthorizeprefix">AuthLDAPAuthorizePrefix</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapbindauthoritative">AuthLDAPBindAuthoritative</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapbinddn">AuthLDAPBindDN</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapbindpassword">AuthLDAPBindPassword</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapcharsetconfig">AuthLDAPCharsetConfig</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapcompareasuser">AuthLDAPCompareAsUser</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapcomparednonserver">AuthLDAPCompareDNOnServer</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapdereferencealiases">AuthLDAPDereferenceAliases</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapgroupattribute">AuthLDAPGroupAttribute</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapgroupattributeisdn">AuthLDAPGroupAttributeIsDN</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapinitialbindasuser">AuthLDAPInitialBindAsUser</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapinitialbindpattern">AuthLDAPInitialBindPattern</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapmaxsubgroupdepth">AuthLDAPMaxSubGroupDepth</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapremoteuserattribute">AuthLDAPRemoteUserAttribute</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapremoteuserisdn">AuthLDAPRemoteUserIsDN</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapsearchasuser">AuthLDAPSearchAsUser</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapsubgroupattribute">AuthLDAPSubGroupAttribute</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapsubgroupclass">AuthLDAPSubGroupClass</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authldapurl">AuthLDAPUrl</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_authnz_ldap">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_authnz_ldap">Report a bug</a></li></ul><h3>See also</h3> +<ul class="seealso"> +<li><code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code></li> +<li><code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code></li> +<li><code class="module"><a href="../mod/mod_authz_user.html">mod_authz_user</a></code></li> +<li><code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</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="contents" id="contents">Contents</a></h2> + + <ul> + <li> <a href="#gcaveats">General caveats</a> </li> + <li> <a href="#operation">Operation</a> + + <ul> + <li><a href="#authenphase">The Authentication + Phase</a></li> + + <li><a href="#authorphase">The Authorization + Phase</a></li> + </ul> + </li> + + <li> + <a href="#requiredirectives">The Require Directives</a> + + <ul> + <li><a href="#requser">Require ldap-user</a></li> + <li><a href="#reqgroup">Require ldap-group</a></li> + <li><a href="#reqdn">Require ldap-dn</a></li> + <li><a href="#reqattribute">Require ldap-attribute</a></li> + <li><a href="#reqfilter">Require ldap-filter</a></li> + </ul> + </li> + + <li><a href="#examples">Examples</a></li> + <li><a href="#usingtls">Using TLS</a></li> + <li><a href="#usingssl">Using SSL</a></li> + <li><a href="#exposed">Exposing Login Information</a></li> + <li><a href="#activedirectory">Using Active Directory</a></li> + <li> + <a href="#frontpage">Using Microsoft FrontPage with + <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code></a> + + <ul> + <li><a href="#howitworks">How It Works</a></li> + <li><a href="#fpcaveats">Caveats</a></li> + </ul> + </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="gcaveats" id="gcaveats">General caveats</a></h2> +<p> This module caches authentication and authorization results based +on the configuration of <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code>. Changes +made to the backing LDAP server will not be immediately reflected on the +HTTP Server, including but not limited to user lockouts/revocations, +password changes, or changes to group memberships. Consult the directives +in <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code> for details of the cache tunables. +</p> +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="operation" id="operation">Operation</a></h2> + + <p>There are two phases in granting access to a user. The first + phase is authentication, in which the <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> + authentication provider verifies that the user's credentials are valid. + This is also called the <em>search/bind</em> phase. The second phase is + authorization, in which <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> determines + if the authenticated user is allowed access to the resource in + question. This is also known as the <em>compare</em> + phase.</p> + + <p><code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> registers both an authn_ldap authentication + provider and an authz_ldap authorization handler. The authn_ldap + authentication provider can be enabled through the + <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> directive + using the <code>ldap</code> value. The authz_ldap handler extends the + <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code> directive's authorization types + by adding <code>ldap-user</code>, <code>ldap-dn</code> and <code>ldap-group</code> + values.</p> + +<h3><a name="authenphase" id="authenphase">The Authentication + Phase</a></h3> + + <p>During the authentication phase, <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> + searches for an entry in the directory that matches the username + that the HTTP client passes. If a single unique match is found, + then <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> attempts to bind to the + directory server using the DN of the entry plus the password + provided by the HTTP client. Because it does a search, then a + bind, it is often referred to as the search/bind phase. Here are + the steps taken during the search/bind phase.</p> + + <ol> + <li>Generate a search filter by combining the attribute and + filter provided in the <code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> directive with + the username passed by the HTTP client.</li> + + <li>Search the directory using the generated filter. If the + search does not return exactly one entry, deny or decline + access.</li> + + <li>Fetch the distinguished name of the entry retrieved from + the search and attempt to bind to the LDAP server using that + DN and the password passed by the HTTP client. If the bind is + unsuccessful, deny or decline access.</li> + </ol> + + <p>The following directives are used during the search/bind + phase</p> + + <table> + + <tr> + <td><code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code></td> + + <td>Specifies the LDAP server, the + base DN, the attribute to use in the search, as well as the + extra search filter to use.</td> + </tr> + + <tr> + <td><code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code></td> + + <td>An optional DN to bind with + during the search phase.</td> + </tr> + + <tr> + <td><code class="directive"><a href="#authldapbindpassword">AuthLDAPBindPassword</a></code></td> + + <td>An optional password to bind + with during the search phase.</td> + </tr> + </table> + + +<h3><a name="authorphase" id="authorphase">The Authorization Phase</a></h3> + + <p>During the authorization phase, <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> + attempts to determine if the user is authorized to access the + resource. Many of these checks require + <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> to do a compare operation on the + LDAP server. This is why this phase is often referred to as the + compare phase. <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> accepts the + following <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code> + directives to determine if the credentials are acceptable:</p> + + <ul> + <li>Grant access if there is a <a href="#reqgroup"><code>Require ldap-user</code></a> directive, and the + username in the directive matches the username passed by the + client.</li> + + <li>Grant access if there is a <a href="#reqdn"><code>Require + ldap-dn</code></a> directive, and the DN in the directive matches + the DN fetched from the LDAP directory.</li> + + <li>Grant access if there is a <a href="#reqgroup"><code>Require ldap-group</code></a> directive, and + the DN fetched from the LDAP directory (or the username + passed by the client) occurs in the LDAP group or, potentially, in + one of its sub-groups.</li> + + <li>Grant access if there is a <a href="#reqattribute"> + <code>Require ldap-attribute</code></a> + directive, and the attribute fetched from the LDAP directory + matches the given value.</li> + + <li>Grant access if there is a <a href="#reqfilter"> + <code>Require ldap-filter</code></a> + directive, and the search filter successfully finds a single user + object that matches the dn of the authenticated user.</li> + + <li>otherwise, deny or decline access</li> + </ul> + + <p>Other <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code> values may also + be used which may require loading additional authorization modules.</p> + + <ul> + <li>Grant access to all successfully authenticated users if + there is a <a href="#requser"><code>Require valid-user</code></a> + directive. (requires <code class="module"><a href="../mod/mod_authz_user.html">mod_authz_user</a></code>)</li> + + <li>Grant access if there is a <a href="#reqgroup"><code>Require group</code></a> directive, and + <code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code> has been loaded with the + <code class="directive"><a href="../mod/mod_authz_groupfile.html#authgroupfile">AuthGroupFile</a></code> + directive set.</li> + + <li>others...</li> + </ul> + + + <p><code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> uses the following directives during the + compare phase:</p> + + <table> + + <tr> + <td><code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> </td> + + <td>The attribute specified in the + URL is used in compare operations for the <code>Require + ldap-user</code> operation.</td> + </tr> + + <tr> + <td><code class="directive"><a href="#authldapcomparednonserver">AuthLDAPCompareDNOnServer</a></code></td> + + <td>Determines the behavior of the + <code>Require ldap-dn</code> directive.</td> + </tr> + + <tr> + <td><code class="directive"><a href="#authldapgroupattribute">AuthLDAPGroupAttribute</a></code></td> + + <td>Determines the attribute to + use for comparisons in the <code>Require ldap-group</code> + directive.</td> + </tr> + + <tr> + <td><code class="directive"><a href="#authldapgroupattributeisdn">AuthLDAPGroupAttributeIsDN</a></code></td> + + <td>Specifies whether to use the + user DN or the username when doing comparisons for the + <code>Require ldap-group</code> directive.</td> + </tr> + + <tr> + <td><code class="directive"><a href="#authldapmaxsubgroupdepth">AuthLDAPMaxSubGroupDepth</a></code></td> + + <td>Determines the maximum depth of sub-groups that will be evaluated + during comparisons in the <code>Require ldap-group</code> directive.</td> + </tr> + + <tr> + <td><code class="directive"><a href="#authldapsubgroupattribute">AuthLDAPSubGroupAttribute</a></code></td> + + <td>Determines the attribute to use when obtaining sub-group members + of the current group during comparisons in the <code>Require ldap-group</code> + directive.</td> + </tr> + + <tr> + <td><code class="directive"><a href="#authldapsubgroupclass">AuthLDAPSubGroupClass</a></code></td> + + <td>Specifies the LDAP objectClass values used to identify if queried directory + objects really are group objects (as opposed to user objects) during the + <code>Require ldap-group</code> directive's sub-group processing.</td> + </tr> + </table> + +</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> + directives are used during the authorization phase to ensure that + a user is allowed to access a resource. mod_authnz_ldap extends the + authorization types with <code>ldap-user</code>, <code>ldap-dn</code>, + <code>ldap-group</code>, <code>ldap-attribute</code> and + <code>ldap-filter</code>. Other authorization types may also be + used but may require that additional authorization modules be loaded.</p> + + <p>Since v2.4.8, <a href="../expr.html">expressions</a> are supported + within the LDAP require directives.</p> + +<h3><a name="requser" id="requser">Require ldap-user</a></h3> + + <p>The <code>Require ldap-user</code> directive specifies what + usernames can access the resource. Once + <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> has retrieved a unique DN from the + directory, it does an LDAP compare operation using the username + specified in the <code>Require ldap-user</code> to see if that username + is part of the just-fetched LDAP entry. Multiple users can be + granted access by putting multiple usernames on the line, + separated with spaces. If a username has a space in it, then it + must be surrounded with double quotes. Multiple users can also be + granted access by using multiple <code>Require ldap-user</code> + directives, with one user per line. For example, with a <code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> of + <code>ldap://ldap/o=Example?cn</code> (i.e., <code>cn</code> is + used for searches), the following Require directives could be used + to restrict access:</p> +<pre class="prettyprint lang-config">Require ldap-user "Barbara Jenson" +Require ldap-user "Fred User" +Require ldap-user "Joe Manager"</pre> + + + <p>Because of the way that <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> handles this + directive, Barbara Jenson could sign on as <em>Barbara + Jenson</em>, <em>Babs Jenson</em> or any other <code>cn</code> that + she has in her LDAP entry. Only the single <code>Require + ldap-user</code> line is needed to support all values of the attribute + in the user's entry.</p> + + <p>If the <code>uid</code> attribute was used instead of the + <code>cn</code> attribute in the URL above, the above three lines + could be condensed to</p> +<pre class="prettyprint lang-config">Require ldap-user bjenson fuser jmanager</pre> + + + +<h3><a name="reqgroup" id="reqgroup">Require ldap-group</a></h3> + + <p>This directive specifies an LDAP group whose members are + allowed access. It takes the distinguished name of the LDAP + group. Note: Do not surround the group name with quotes. + For example, assume that the following entry existed in + the LDAP directory:</p> +<div class="example"><pre>dn: cn=Administrators, o=Example +objectClass: groupOfUniqueNames +uniqueMember: cn=Barbara Jenson, o=Example +uniqueMember: cn=Fred User, o=Example</pre></div> + + <p>The following directive would grant access to both Fred and + Barbara:</p> +<pre class="prettyprint lang-config">Require ldap-group cn=Administrators, o=Example</pre> + + + <p>Members can also be found within sub-groups of a specified LDAP group + if <code class="directive"><a href="#authldapmaxsubgroupdepth">AuthLDAPMaxSubGroupDepth</a></code> + is set to a value greater than 0. For example, assume the following entries + exist in the LDAP directory:</p> +<div class="example"><pre>dn: cn=Employees, o=Example +objectClass: groupOfUniqueNames +uniqueMember: cn=Managers, o=Example +uniqueMember: cn=Administrators, o=Example +uniqueMember: cn=Users, o=Example + +dn: cn=Managers, o=Example +objectClass: groupOfUniqueNames +uniqueMember: cn=Bob Ellis, o=Example +uniqueMember: cn=Tom Jackson, o=Example + +dn: cn=Administrators, o=Example +objectClass: groupOfUniqueNames +uniqueMember: cn=Barbara Jenson, o=Example +uniqueMember: cn=Fred User, o=Example + +dn: cn=Users, o=Example +objectClass: groupOfUniqueNames +uniqueMember: cn=Allan Jefferson, o=Example +uniqueMember: cn=Paul Tilley, o=Example +uniqueMember: cn=Temporary Employees, o=Example + +dn: cn=Temporary Employees, o=Example +objectClass: groupOfUniqueNames +uniqueMember: cn=Jim Swenson, o=Example +uniqueMember: cn=Elliot Rhodes, o=Example</pre></div> + + <p>The following directives would allow access for Bob Ellis, Tom Jackson, + Barbara Jenson, Fred User, Allan Jefferson, and Paul Tilley but would not + allow access for Jim Swenson, or Elliot Rhodes (since they are at a + sub-group depth of 2):</p> +<pre class="prettyprint lang-config">Require ldap-group cn=Employees, o=Example +AuthLDAPMaxSubGroupDepth 1</pre> + + + <p>Behavior of this directive is modified by the <code class="directive"><a href="#authldapgroupattribute">AuthLDAPGroupAttribute</a></code>, <code class="directive"><a href="#authldapgroupattributeisdn">AuthLDAPGroupAttributeIsDN</a></code>, <code class="directive"><a href="#authldapmaxsubgroupdepth">AuthLDAPMaxSubGroupDepth</a></code>, <code class="directive"><a href="#authldapsubgroupattribute">AuthLDAPSubGroupAttribute</a></code>, and <code class="directive"><a href="#authldapsubgroupclass">AuthLDAPSubGroupClass</a></code> + directives.</p> + + +<h3><a name="reqdn" id="reqdn">Require ldap-dn</a></h3> + + <p>The <code>Require ldap-dn</code> directive allows the administrator + to grant access based on distinguished names. It specifies a DN + that must match for access to be granted. If the distinguished + name that was retrieved from the directory server matches the + distinguished name in the <code>Require ldap-dn</code>, then + authorization is granted. Note: do not surround the distinguished + name with quotes.</p> + + <p>The following directive would grant access to a specific + DN:</p> +<pre class="prettyprint lang-config">Require ldap-dn cn=Barbara Jenson, o=Example</pre> + + + <p>Behavior of this directive is modified by the <code class="directive"><a href="#authldapcomparednonserver">AuthLDAPCompareDNOnServer</a></code> + directive.</p> + + +<h3><a name="reqattribute" id="reqattribute">Require ldap-attribute</a></h3> + + <p>The <code>Require ldap-attribute</code> directive allows the + administrator to grant access based on attributes of the authenticated + user in the LDAP directory. If the attribute in the directory + matches the value given in the configuration, access is granted.</p> + + <p>The following directive would grant access to anyone with + the attribute employeeType = active</p> + + <pre class="prettyprint lang-config">Require ldap-attribute employeeType="active"</pre> + + + <p>Multiple attribute/value pairs can be specified on the same line + separated by spaces or they can be specified in multiple + <code>Require ldap-attribute</code> directives. The effect of listing + multiple attribute/values pairs is an OR operation. Access will be + granted if any of the listed attribute values match the value of the + corresponding attribute in the user object. If the value of the + attribute contains a space, only the value must be within double quotes.</p> + + <p>The following directive would grant access to anyone with + the city attribute equal to "San Jose" or status equal to "Active"</p> + + <pre class="prettyprint lang-config">Require ldap-attribute city="San Jose" status="active"</pre> + + + + +<h3><a name="reqfilter" id="reqfilter">Require ldap-filter</a></h3> + + <p>The <code>Require ldap-filter</code> directive allows the + administrator to grant access based on a complex LDAP search filter. + If the dn returned by the filter search matches the authenticated user + dn, access is granted.</p> + + <p>The following directive would grant access to anyone having a cell phone + and is in the marketing department</p> + + <pre class="prettyprint lang-config">Require ldap-filter "&(cell=*)(department=marketing)"</pre> + + + <p>The difference between the <code>Require ldap-filter</code> directive and the + <code>Require ldap-attribute</code> directive is that <code>ldap-filter</code> + performs a search operation on the LDAP directory using the specified search + filter rather than a simple attribute comparison. If a simple attribute + comparison is all that is required, the comparison operation performed by + <code>ldap-attribute</code> will be faster than the search operation + used by <code>ldap-filter</code> especially within a large directory.</p> + + + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="examples" id="examples">Examples</a></h2> + + <ul> + <li> + Grant access to anyone who exists in the LDAP directory, + using their UID for searches. +<pre class="prettyprint lang-config">AuthLDAPURL "ldap://ldap1.example.com:389/ou=People, o=Example?uid?sub?(objectClass=*)" +Require valid-user</pre> + + </li> + + <li> + The next example is the same as above; but with the fields + that have useful defaults omitted. Also, note the use of a + redundant LDAP server. +<pre class="prettyprint lang-config">AuthLDAPURL "ldap://ldap1.example.com ldap2.example.com/ou=People, o=Example" +Require valid-user</pre> + + </li> + + <li> + The next example is similar to the previous one, but it + uses the common name instead of the UID. Note that this + could be problematical if multiple people in the directory + share the same <code>cn</code>, because a search on <code>cn</code> + <strong>must</strong> return exactly one entry. That's why + this approach is not recommended: it's a better idea to + choose an attribute that is guaranteed unique in your + directory, such as <code>uid</code>. +<pre class="prettyprint lang-config">AuthLDAPURL "ldap://ldap.example.com/ou=People, o=Example?cn" +Require valid-user</pre> + + </li> + + <li> + Grant access to anybody in the Administrators group. The + users must authenticate using their UID. +<pre class="prettyprint lang-config">AuthLDAPURL ldap://ldap.example.com/o=Example?uid +Require ldap-group cn=Administrators, o=Example</pre> + + </li> + + <li> + Grant access to anybody in the group whose name matches the + hostname of the virtual host. In this example an + <a href="../expr.html">expression</a> is used to build the filter. +<pre class="prettyprint lang-config">AuthLDAPURL ldap://ldap.example.com/o=Example?uid +Require ldap-group cn=%{SERVER_NAME}, o=Example</pre> + + </li> + + <li> + The next example assumes that everyone at Example who + carries an alphanumeric pager will have an LDAP attribute + of <code>qpagePagerID</code>. The example will grant access + only to people (authenticated via their UID) who have + alphanumeric pagers: +<pre class="prettyprint lang-config">AuthLDAPURL ldap://ldap.example.com/o=Example?uid??(qpagePagerID=*) +Require valid-user</pre> + + </li> + + <li> + <p>The next example demonstrates the power of using filters + to accomplish complicated administrative requirements. + Without filters, it would have been necessary to create a + new LDAP group and ensure that the group's members remain + synchronized with the pager users. This becomes trivial + with filters. The goal is to grant access to anyone who has + a pager, plus grant access to Joe Manager, who doesn't + have a pager, but does need to access the same + resource:</p> +<pre class="prettyprint lang-config">AuthLDAPURL ldap://ldap.example.com/o=Example?uid??(|(qpagePagerID=*)(uid=jmanager)) +Require valid-user</pre> + + + <p>This last may look confusing at first, so it helps to + evaluate what the search filter will look like based on who + connects, as shown below. If + Fred User connects as <code>fuser</code>, the filter would look + like</p> + + <div class="example"><p><code>(&(|(qpagePagerID=*)(uid=jmanager))(uid=fuser))</code></p></div> + + <p>The above search will only succeed if <em>fuser</em> has a + pager. When Joe Manager connects as <em>jmanager</em>, the + filter looks like</p> + + <div class="example"><p><code>(&(|(qpagePagerID=*)(uid=jmanager))(uid=jmanager))</code></p></div> + + <p>The above search will succeed whether <em>jmanager</em> + has a pager or not.</p> + </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="usingtls" id="usingtls">Using TLS</a></h2> + + <p>To use TLS, see the <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code> directives <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedclientcert">LDAPTrustedClientCert</a></code>, <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedglobalcert">LDAPTrustedGlobalCert</a></code> and <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedmode">LDAPTrustedMode</a></code>.</p> + + <p>An optional second parameter can be added to the + <code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> to override + the default connection type set by <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedmode">LDAPTrustedMode</a></code>. + This will allow the connection established by an <em>ldap://</em> Url + to be upgraded to a secure connection on the same port.</p> +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="usingssl" id="usingssl">Using SSL</a></h2> + + <p>To use SSL, see the <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code> directives <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedclientcert">LDAPTrustedClientCert</a></code>, <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedglobalcert">LDAPTrustedGlobalCert</a></code> and <code class="directive"><a href="../mod/mod_ldap.html#ldaptrustedmode">LDAPTrustedMode</a></code>.</p> + + <p>To specify a secure LDAP server, use <em>ldaps://</em> in the + <code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> + directive, instead of <em>ldap://</em>.</p> +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="exposed" id="exposed">Exposing Login Information</a></h2> + + <p>when this module performs <em>authentication</em>, ldap attributes specified + in the <code class="directive"><a href="#authldapurl">authldapurl</a></code> + directive are placed in environment variables with the prefix "AUTHENTICATE_".</p> + + <p>when this module performs <em>authorization</em>, ldap attributes specified + in the <code class="directive"><a href="#authldapurl">authldapurl</a></code> + directive are placed in environment variables with the prefix "AUTHORIZE_".</p> + + <p>If the attribute field contains the username, common name + and telephone number of a user, a CGI program will have access to + this information without the need to make a second independent LDAP + query to gather this additional information.</p> + + <p>This has the potential to dramatically simplify the coding and + configuration required in some web applications.</p> + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="activedirectory" id="activedirectory">Using Active Directory</a></h2> + + <p>An Active Directory installation may support multiple domains at the + same time. To distinguish users between domains, an identifier called + a User Principle Name (UPN) can be added to a user's entry in the + directory. This UPN usually takes the form of the user's account + name, followed by the domain components of the particular domain, + for example <em>somebody@nz.example.com</em>.</p> + + <p>You may wish to configure the <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> + module to authenticate users present in any of the domains making up + the Active Directory forest. In this way both + <em>somebody@nz.example.com</em> and <em>someone@au.example.com</em> + can be authenticated using the same query at the same time.</p> + + <p>To make this practical, Active Directory supports the concept of + a Global Catalog. This Global Catalog is a read only copy of selected + attributes of all the Active Directory servers within the Active + Directory forest. Querying the Global Catalog allows all the domains + to be queried in a single query, without the query spanning servers + over potentially slow links.</p> + + <p>If enabled, the Global Catalog is an independent directory server + that runs on port 3268 (3269 for SSL). To search for a user, do a + subtree search for the attribute <em>userPrincipalName</em>, with + an empty search root, like so:</p> + +<pre class="prettyprint lang-config">AuthLDAPBindDN apache@example.com +AuthLDAPBindPassword password +AuthLDAPURL ldap://10.0.0.1:3268/?userPrincipalName?sub</pre> + + + <p>Users will need to enter their User Principal Name as a login, in + the form <em>somebody@nz.example.com</em>.</p> + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="frontpage" id="frontpage">Using Microsoft + FrontPage with mod_authnz_ldap</a></h2> + + <p>Normally, FrontPage uses FrontPage-web-specific user/group + files (i.e., the <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> and + <code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code> modules) to handle all + authentication. Unfortunately, it is not possible to just + change to LDAP authentication by adding the proper directives, + because it will break the <em>Permissions</em> forms in + the FrontPage client, which attempt to modify the standard + text-based authorization files.</p> + + <p>Once a FrontPage web has been created, adding LDAP + authentication to it is a matter of adding the following + directives to <em>every</em> <code>.htaccess</code> file + that gets created in the web</p> +<pre class="prettyprint lang-config">AuthLDAPURL "the url" +AuthGroupFile "mygroupfile" +Require group "mygroupfile"</pre> + + +<h3><a name="howitworks" id="howitworks">How It Works</a></h3> + + <p>FrontPage restricts access to a web by adding the <code>Require + valid-user</code> directive to the <code>.htaccess</code> + files. The <code>Require valid-user</code> directive will succeed for + any user who is valid <em>as far as LDAP is + concerned</em>. This means that anybody who has an entry in + the LDAP directory is considered a valid user, whereas FrontPage + considers only those people in the local user file to be + valid. By substituting the ldap-group with group file authorization, + Apache is allowed to consult the local user file (which is managed by + FrontPage) - instead of LDAP - when handling authorizing the user.</p> + + <p>Once directives have been added as specified above, + FrontPage users will be able to perform all management + operations from the FrontPage client.</p> + + +<h3><a name="fpcaveats" id="fpcaveats">Caveats</a></h3> + + <ul> + <li>When choosing the LDAP URL, the attribute to use for + authentication should be something that will also be valid + for putting into a <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> user file. + The user ID is ideal for this.</li> + + <li>When adding users via FrontPage, FrontPage administrators + should choose usernames that already exist in the LDAP + directory (for obvious reasons). Also, the password that the + administrator enters into the form is ignored, since Apache + will actually be authenticating against the password in the + LDAP database, and not against the password in the local user + file. This could cause confusion for web administrators.</li> + + + <li>Apache must be compiled with <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code>, + <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> and + <code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code> in order to + use FrontPage support. This is because Apache will still use + the <code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code> group file for determine + the extent of a user's access to the FrontPage web.</li> + + <li>The directives must be put in the <code>.htaccess</code> + files. Attempting to put them inside <code class="directive"><a href="../mod/core.html#location"><Location></a></code> or <code class="directive"><a href="../mod/core.html#directory"><Directory></a></code> directives won't work. This + is because <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> has to be able to grab + the <code class="directive"><a href="../mod/mod_authz_groupfile.html#authgroupfile">AuthGroupFile</a></code> + directive that is found in FrontPage <code>.htaccess</code> + files so that it knows where to look for the valid user list. If + the <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> directives aren't in the same + <code>.htaccess</code> file as the FrontPage directives, then + the hack won't work, because <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will + never get a chance to process the <code>.htaccess</code> file, + and won't be able to find the FrontPage-managed user file.</li> + </ul> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPAuthorizePrefix" id="AuthLDAPAuthorizePrefix">AuthLDAPAuthorizePrefix</a> <a name="authldapauthorizeprefix" id="authldapauthorizeprefix">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specifies the prefix for environment variables set during +authorization</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPAuthorizePrefix <em>prefix</em></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPAuthorizePrefix AUTHORIZE_</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.6 and later</td></tr> +</table> + <p>This directive allows you to override the prefix used for environment + variables set during LDAP authorization. If <em>AUTHENTICATE_</em> is + specified, consumers of these environment variables see the same information + whether LDAP has performed authentication, authorization, or both.</p> + + <div class="note"><h3>Note</h3> + No authorization variables are set when a user is authorized on the basis of + <code>Require valid-user</code>. + </div> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPBindAuthoritative" id="AuthLDAPBindAuthoritative">AuthLDAPBindAuthoritative</a> <a name="authldapbindauthoritative" id="authldapbindauthoritative">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines if other authentication providers are used when a user can be mapped to a DN but the server cannot successfully bind with the user's credentials.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPBindAuthoritative off|on</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPBindAuthoritative on</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +</table> + <p>By default, subsequent authentication providers are only queried if a + user cannot be mapped to a DN, but not if the user can be mapped to a DN and their + password cannot be verified with an LDAP bind. + If <code class="directive">AuthLDAPBindAuthoritative</code> + is set to <em>off</em>, other configured authentication modules will have + a chance to validate the user if the LDAP bind (with the current user's credentials) + fails for any reason.</p> + <p> This allows users present in both LDAP and + <code class="directive"><a href="../mod/mod_authn_file.html#authuserfile">AuthUserFile</a></code> to authenticate + when the LDAP server is available but the user's account is locked or password + is otherwise unusable.</p> + +<h3>See also</h3> +<ul> +<li><code class="directive"><a href="../mod/mod_authn_file.html#authuserfile">AuthUserFile</a></code></li> +<li><code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</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><a name="AuthLDAPBindDN" id="AuthLDAPBindDN">AuthLDAPBindDN</a> <a name="authldapbinddn" id="authldapbinddn">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Optional DN to use in binding to the LDAP server</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPBindDN <em>distinguished-name</em></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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +</table> + <p>An optional DN used to bind to the server when searching for + entries. If not provided, <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will use + an anonymous bind.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPBindPassword" id="AuthLDAPBindPassword">AuthLDAPBindPassword</a> <a name="authldapbindpassword" id="authldapbindpassword">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Password used in conjunction with the bind DN</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPBindPassword <em>password</em></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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td><em>exec:</em> was added in 2.4.5.</td></tr> +</table> + <p>A bind password to use in conjunction with the bind DN. Note + that the bind password is probably sensitive data, and should be + properly protected. You should only use the <code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code> and <code class="directive">AuthLDAPBindPassword</code> if you + absolutely need them to search the directory.</p> + + <p>If the value begins with exec: the resulting command will be + executed and the first line returned to standard output by the + program will be used as the password.</p> +<pre class="prettyprint lang-config">#Password used as-is +AuthLDAPBindPassword secret + +#Run /path/to/program to get my password +AuthLDAPBindPassword exec:/path/to/program + +#Run /path/to/otherProgram and provide arguments +AuthLDAPBindPassword "exec:/path/to/otherProgram argument1"</pre> + + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPCharsetConfig" id="AuthLDAPCharsetConfig">AuthLDAPCharsetConfig</a> <a name="authldapcharsetconfig" id="authldapcharsetconfig">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Language to charset conversion configuration file</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPCharsetConfig <em>file-path</em></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_authnz_ldap</td></tr> +</table> + <p>The <code class="directive">AuthLDAPCharsetConfig</code> directive sets the location + of the language to charset conversion configuration file. <var>File-path</var> is relative + to the <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>. This file specifies + the list of language extensions to character sets. + Most administrators use the provided <code>charset.conv</code> + file, which associates common language extensions to character sets.</p> + + <p>The file contains lines in the following format:</p> + + <div class="example"><p><code> + <var>Language-Extension</var> <var>charset</var> [<var>Language-String</var>] ... + </code></p></div> + + <p>The case of the extension does not matter. Blank lines, and lines + beginning with a hash character (<code>#</code>) are ignored.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPCompareAsUser" id="AuthLDAPCompareAsUser">AuthLDAPCompareAsUser</a> <a name="authldapcompareasuser" id="authldapcompareasuser">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use the authenticated user's credentials to perform authorization comparisons</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPCompareAsUser on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPCompareAsUser off</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.6 and later</td></tr> +</table> + <p>When set, and <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> has authenticated the + user, LDAP comparisons for authorization use the queried distinguished name (DN) + and HTTP basic authentication password of the authenticated user instead of + the servers configured credentials.</p> + + <p> The <em>ldap-attribute</em>, <em>ldap-user</em>, and <em>ldap-group</em> (single-level only) + authorization checks use comparisons.</p> + + <p>This directive only has effect on the comparisons performed during + nested group processing when <code class="directive"><a href="#authldapsearchasuser"> + AuthLDAPSearchAsUser</a></code> is also enabled.</p> + + <p> This directive should only be used when your LDAP server doesn't + accept anonymous comparisons and you cannot use a dedicated + <code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code>. + </p> + +<h3>See also</h3> +<ul> +<li><code class="directive"><a href="#authldapinitialbindasuser">AuthLDAPInitialBindAsUser</a></code></li> +<li><code class="directive"><a href="#authldapsearchasuser">AuthLDAPSearchAsUser</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><a name="AuthLDAPCompareDNOnServer" id="AuthLDAPCompareDNOnServer">AuthLDAPCompareDNOnServer</a> <a name="authldapcomparednonserver" id="authldapcomparednonserver">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use the LDAP server to compare the DNs</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPCompareDNOnServer on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPCompareDNOnServer on</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +</table> + <p>When set, <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will use the LDAP + server to compare the DNs. This is the only foolproof way to + compare DNs. <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will search the + directory for the DN specified with the <a href="#reqdn"><code>Require dn</code></a> directive, then, + retrieve the DN and compare it with the DN retrieved from the user + entry. If this directive is not set, + <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> simply does a string comparison. It + is possible to get false negatives with this approach, but it is + much faster. Note the <code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code> cache can speed up + DN comparison in most situations.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPDereferenceAliases" id="AuthLDAPDereferenceAliases">AuthLDAPDereferenceAliases</a> <a name="authldapdereferencealiases" id="authldapdereferencealiases">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>When will the module de-reference aliases</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPDereferenceAliases never|searching|finding|always</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPDereferenceAliases always</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +</table> + <p>This directive specifies when <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will + de-reference aliases during LDAP operations. The default is + <code>always</code>.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPGroupAttribute" id="AuthLDAPGroupAttribute">AuthLDAPGroupAttribute</a> <a name="authldapgroupattribute" id="authldapgroupattribute">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>LDAP attributes used to identify the user members of +groups.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPGroupAttribute <em>attribute</em></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPGroupAttribute member uniquemember</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +</table> + <p>This directive specifies which LDAP attributes are used to + check for user members within groups. Multiple attributes can be used + by specifying this directive multiple times. If not specified, + then <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> uses the <code>member</code> and + <code>uniquemember</code> attributes.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPGroupAttributeIsDN" id="AuthLDAPGroupAttributeIsDN">AuthLDAPGroupAttributeIsDN</a> <a name="authldapgroupattributeisdn" id="authldapgroupattributeisdn">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use the DN of the client username when checking for +group membership</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPGroupAttributeIsDN on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPGroupAttributeIsDN on</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +</table> + <p>When set <code>on</code>, this directive says to use the + distinguished name of the client username when checking for group + membership. Otherwise, the username will be used. For example, + assume that the client sent the username <code>bjenson</code>, + which corresponds to the LDAP DN <code>cn=Babs Jenson, + o=Example</code>. If this directive is set, + <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will check if the group has + <code>cn=Babs Jenson, o=Example</code> as a member. If this + directive is not set, then <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will + check if the group has <code>bjenson</code> as a member.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPInitialBindAsUser" id="AuthLDAPInitialBindAsUser">AuthLDAPInitialBindAsUser</a> <a name="authldapinitialbindasuser" id="authldapinitialbindasuser">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines if the server does the initial DN lookup using the basic authentication users' +own username, instead of anonymously or with hard-coded credentials for the server</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPInitialBindAsUser off|on</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPInitialBindAsUser off</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.6 and later</td></tr> +</table> + <p>By default, the server either anonymously, or with a dedicated user and + password, converts the basic authentication username into an LDAP + distinguished name (DN). This directive forces the server to use the verbatim username + and password provided by the incoming user to perform the initial DN + search.</p> + + <p> If the verbatim username can't directly bind, but needs some + cosmetic transformation, see <code class="directive"><a href="#authldapinitialbindpattern"> + AuthLDAPInitialBindPattern</a></code>.</p> + + <p> This directive should only be used when your LDAP server doesn't + accept anonymous searches and you cannot use a dedicated + <code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code>. + </p> + + <div class="note"><h3>Not available with authorization-only</h3> + This directive can only be used if this module authenticates the user, and + has no effect when this module is used exclusively for authorization. + </div> + +<h3>See also</h3> +<ul> +<li><code class="directive"><a href="#authldapinitialbindpattern">AuthLDAPInitialBindPattern</a></code></li> +<li><code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code></li> +<li><code class="directive"><a href="#authldapcompareasuser">AuthLDAPCompareAsUser</a></code></li> +<li><code class="directive"><a href="#authldapsearchasuser">AuthLDAPSearchAsUser</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><a name="AuthLDAPInitialBindPattern" id="AuthLDAPInitialBindPattern">AuthLDAPInitialBindPattern</a> <a name="authldapinitialbindpattern" id="authldapinitialbindpattern">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specifies the transformation of the basic authentication username to be used when binding to the LDAP server +to perform a DN lookup</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPInitialBindPattern <em><var>regex</var> <var>substitution</var></em></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPInitialBindPattern (.*) $1 (remote username used verbatim)</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.6 and later</td></tr> +</table> + <p>If <code class="directive"><a href="#authldapinitialbindasuser">AuthLDAPInitialBindAsUser</a></code> is set to + <em>ON</em>, the basic authentication username will be transformed according to the + regular expression and substitution arguments.</p> + + <p> The regular expression argument is compared against the current basic authentication username. + The substitution argument may contain backreferences, but has no other variable interpolation.</p> + + <p> This directive should only be used when your LDAP server doesn't + accept anonymous searches and you cannot use a dedicated + <code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code>. + </p> + + <pre class="prettyprint lang-config">AuthLDAPInitialBindPattern (.+) $1@example.com</pre> + + <pre class="prettyprint lang-config">AuthLDAPInitialBindPattern (.+) cn=$1,dc=example,dc=com</pre> + + + <div class="note"><h3>Not available with authorization-only</h3> + This directive can only be used if this module authenticates the user, and + has no effect when this module is used exclusively for authorization. + </div> + <div class="note"><h3>debugging</h3> + The substituted DN is recorded in the environment variable + <em>LDAP_BINDASUSER</em>. If the regular expression does not match the input, + the verbatim username is used. + </div> + +<h3>See also</h3> +<ul> +<li><code class="directive"><a href="#authldapinitialbindasuser">AuthLDAPInitialBindAsUser</a></code></li> +<li><code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</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><a name="AuthLDAPMaxSubGroupDepth" id="AuthLDAPMaxSubGroupDepth">AuthLDAPMaxSubGroupDepth</a> <a name="authldapmaxsubgroupdepth" id="authldapmaxsubgroupdepth">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specifies the maximum sub-group nesting depth that will be +evaluated before the user search is discontinued.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPMaxSubGroupDepth <var>Number</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPMaxSubGroupDepth 10</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.0 and later</td></tr> +</table> + <p>When this directive is set to a non-zero value <code>X</code> + combined with use of the <code>Require ldap-group someGroupDN</code> + directive, the provided user credentials will be searched for + as a member of the <code>someGroupDN</code> directory object or of + any group member of the current group up to the maximum nesting + level <code>X</code> specified by this directive.</p> + <p>See the <a href="#reqgroup"><code>Require ldap-group</code></a> + section for a more detailed example.</p> + + <div class="note"><h3>Nested groups performance</h3> + <p> When <code class="directive">AuthLDAPSubGroupAttribute</code> overlaps with + <code class="directive">AuthLDAPGroupAttribute</code> (as it does by default and + as required by common LDAP schemas), uncached searching for subgroups in + large groups can be very slow. If you use large, non-nested groups, set + <code class="directive">AuthLDAPMaxSubGroupDepth</code> to zero.</p> + </div> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPRemoteUserAttribute" id="AuthLDAPRemoteUserAttribute">AuthLDAPRemoteUserAttribute</a> <a name="authldapremoteuserattribute" id="authldapremoteuserattribute">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use the value of the attribute returned during the user +query to set the REMOTE_USER environment variable</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPRemoteUserAttribute uid</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +</table> + <p>If this directive is set, the value of the + <code>REMOTE_USER</code> environment variable will be set to the + value of the attribute specified. Make sure that this attribute is + included in the list of attributes in the AuthLDAPUrl definition, + otherwise this directive will have no effect. This directive, if + present, takes precedence over <code class="directive"><a href="#authldapremoteuserisdn">AuthLDAPRemoteUserIsDN</a></code>. This + directive is useful should you want people to log into a website + using an email address, but a backend application expects the + username as a userid.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPRemoteUserIsDN" id="AuthLDAPRemoteUserIsDN">AuthLDAPRemoteUserIsDN</a> <a name="authldapremoteuserisdn" id="authldapremoteuserisdn">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use the DN of the client username to set the REMOTE_USER +environment variable</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPRemoteUserIsDN on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPRemoteUserIsDN off</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +</table> + <p>If this directive is set to on, the value of the + <code>REMOTE_USER</code> environment variable will be set to the full + distinguished name of the authenticated user, rather than just + the username that was passed by the client. It is turned off by + default.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPSearchAsUser" id="AuthLDAPSearchAsUser">AuthLDAPSearchAsUser</a> <a name="authldapsearchasuser" id="authldapsearchasuser">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use the authenticated user's credentials to perform authorization searches</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPSearchAsUser on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPSearchAsUser off</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.6 and later</td></tr> +</table> + <p>When set, and <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> has authenticated the + user, LDAP searches for authorization use the queried distinguished name (DN) + and HTTP basic authentication password of the authenticated user instead of + the servers configured credentials.</p> + + <p> The <em>ldap-filter</em> and <em>ldap-dn</em> authorization + checks use searches.</p> + + <p>This directive only has effect on the comparisons performed during + nested group processing when <code class="directive"><a href="#authldapcompareasuser"> + AuthLDAPCompareAsUser</a></code> is also enabled.</p> + + <p> This directive should only be used when your LDAP server doesn't + accept anonymous searches and you cannot use a dedicated + <code class="directive"><a href="#authldapbinddn">AuthLDAPBindDN</a></code>. + </p> + +<h3>See also</h3> +<ul> +<li><code class="directive"><a href="#authldapinitialbindasuser">AuthLDAPInitialBindAsUser</a></code></li> +<li><code class="directive"><a href="#authldapcompareasuser">AuthLDAPCompareAsUser</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><a name="AuthLDAPSubGroupAttribute" id="AuthLDAPSubGroupAttribute">AuthLDAPSubGroupAttribute</a> <a name="authldapsubgroupattribute" id="authldapsubgroupattribute">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specifies the attribute labels, one value per +directive line, used to distinguish the members of the current group that +are groups.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPSubGroupAttribute <em>attribute</em></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPSubgroupAttribute member uniquemember</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.0 and later</td></tr> +</table> + <p>An LDAP group object may contain members that are users and + members that are groups (called nested or sub groups). The + <code class="directive">AuthLDAPSubGroupAttribute</code> directive identifies the + labels of group members and the <code class="directive"><a href="#authldapgroupattribute">AuthLDAPGroupAttribute</a></code> + directive identifies the labels of the user members. Multiple + attributes can be used by specifying this directive multiple times. + If not specified, then <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> uses the + <code>member</code> and <code>uniqueMember</code> attributes.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPSubGroupClass" id="AuthLDAPSubGroupClass">AuthLDAPSubGroupClass</a> <a name="authldapsubgroupclass" id="authldapsubgroupclass">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specifies which LDAP objectClass values identify directory +objects that are groups during sub-group processing.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPSubGroupClass <em>LdapObjectClass</em></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthLDAPSubGroupClass groupOfNames groupOfUniqueNames</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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.3.0 and later</td></tr> +</table> + <p>An LDAP group object may contain members that are users and + members that are groups (called nested or sub groups). The + <code class="directive"><a href="#authldapsubgroupattribute">AuthLDAPSubGroupAttribute</a></code> + directive identifies the + labels of members that may be sub-groups of the current group + (as opposed to user members). The <code class="directive">AuthLDAPSubGroupClass</code> + directive specifies the LDAP objectClass values used in verifying that + these potential sub-groups are in fact group objects. Verified sub-groups + can then be searched for more user or sub-group members. Multiple + attributes can be used by specifying this directive multiple times. + If not specified, then <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> uses the + <code>groupOfNames</code> and <code>groupOfUniqueNames</code> values.</p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AuthLDAPUrl" id="AuthLDAPUrl">AuthLDAPUrl</a> <a name="authldapurl" id="authldapurl">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>URL specifying the LDAP search parameters</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthLDAPUrl <em>url [NONE|SSL|TLS|STARTTLS]</em></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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authnz_ldap</td></tr> +</table> + <p>An RFC 2255 URL which specifies the LDAP search parameters + to use. The syntax of the URL is</p> +<div class="example"><p><code>ldap://host:port/basedn?attribute?scope?filter</code></p></div> + <p>If you want to specify more than one LDAP URL that Apache should try in turn, the syntax is:</p> +<pre class="prettyprint lang-config">AuthLDAPUrl "ldap://ldap1.example.com ldap2.example.com/dc=..."</pre> + +<p><em><strong>Caveat: </strong>If you specify multiple servers, you need to enclose the entire URL string in quotes; +otherwise you will get an error: "AuthLDAPURL takes one argument, URL to define LDAP connection.." </em> +You can of course use search parameters on each of these.</p> + +<dl> +<dt>ldap</dt> + + <dd>For regular ldap, use the + string <code>ldap</code>. For secure LDAP, use <code>ldaps</code> + instead. Secure LDAP is only available if Apache was linked + to an LDAP library with SSL support.</dd> + +<dt>host:port</dt> + + <dd> + <p>The name/port of the ldap server (defaults to + <code>localhost:389</code> for <code>ldap</code>, and + <code>localhost:636</code> for <code>ldaps</code>). To + specify multiple, redundant LDAP servers, just list all + servers, separated by spaces. <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> + will try connecting to each server in turn, until it makes a + successful connection. If multiple ldap servers are specified, + then entire LDAP URL must be encapsulated in double quotes.</p> + + <p>Once a connection has been made to a server, that + connection remains active for the life of the + <code class="program"><a href="../programs/httpd.html">httpd</a></code> process, or until the LDAP server goes + down.</p> + + <p>If the LDAP server goes down and breaks an existing + connection, <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> will attempt to + re-connect, starting with the primary server, and trying + each redundant server in turn. Note that this is different + than a true round-robin search.</p> + </dd> + +<dt>basedn</dt> + + <dd>The DN of the branch of the + directory where all searches should start from. At the very + least, this must be the top of your directory tree, but + could also specify a subtree in the directory.</dd> + +<dt>attribute</dt> + + <dd>The attribute to search for. + Although RFC 2255 allows a comma-separated list of + attributes, only the first attribute will be used, no + matter how many are provided. If no attributes are + provided, the default is to use <code>uid</code>. It's a good + idea to choose an attribute that will be unique across all + entries in the subtree you will be using. All attributes + listed will be put into the environment with an AUTHENTICATE_ prefix + for use by other modules.</dd> + +<dt>scope</dt> + + <dd>The scope of the search. Can be either <code>one</code> or + <code>sub</code>. Note that a scope of <code>base</code> is + also supported by RFC 2255, but is not supported by this + module. If the scope is not provided, or if <code>base</code> scope + is specified, the default is to use a scope of + <code>sub</code>.</dd> + +<dt>filter</dt> + + <dd>A valid LDAP search filter. If + not provided, defaults to <code>(objectClass=*)</code>, which + will search for all objects in the tree. Filters are + limited to approximately 8000 characters (the definition of + <code>MAX_STRING_LEN</code> in the Apache source code). This + should be more than sufficient for any application. In 2.4.10 and later, + the keyword <code>none</code> disables the use of a filter; this is + required by some primitive LDAP servers.</dd> +</dl> + + <p>When doing searches, the attribute, filter and username passed + by the HTTP client are combined to create a search filter that + looks like + <code>(&(<em>filter</em>)(<em>attribute</em>=<em>username</em>))</code>.</p> + + <p>For example, consider an URL of + <code>ldap://ldap.example.com/o=Example?cn?sub?(posixid=*)</code>. When + a client attempts to connect using a username of <code>Babs + Jenson</code>, the resulting search filter will be + <code>(&(posixid=*)(cn=Babs Jenson))</code>.</p> + + <p>An optional parameter can be added to allow the LDAP Url to override + the connection type. This parameter can be one of the following:</p> + +<dl> + <dt>NONE</dt> + <dd>Establish an unsecure connection on the default LDAP port. This + is the same as <code>ldap://</code> on port 389.</dd> + <dt>SSL</dt> + <dd>Establish a secure connection on the default secure LDAP port. + This is the same as <code>ldaps://</code></dd> + <dt>TLS | STARTTLS</dt> + <dd>Establish an upgraded secure connection on the default LDAP port. + This connection will be initiated on port 389 by default and then + upgraded to a secure connection on the same port.</dd> +</dl> + + <p>See above for examples of <code class="directive"><a href="#authldapurl">AuthLDAPUrl</a></code> URLs.</p> + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_authnz_ldap.html" title="English"> en </a> | +<a href="../fr/mod/mod_authnz_ldap.html" hreflang="fr" rel="alternate" title="Français"> 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. 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