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| <p class="apache">Apache HTTP Server Version 2.2</p> |
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| <div class="retired"><h4>Please note</h4> |
| <p>This document refers to the <strong>2.2</strong> version of Apache httpd, which is no longer maintained. The active release is documented <a href="http://httpd.apache.org/docs/current">here</a>. If you have not already upgraded, please follow <a href="http://httpd.apache.org/docs/current/upgrading.html">this link</a> for more information.</p> |
| <p>You may follow <a href="http://httpd.apache.org/docs/current/mod/mod_authnz_ldap.html">this link</a> to go to the current version of this document.</p></div><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 provides 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"><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="#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="#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="#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="#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="#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="#authldapurl">AuthLDAPUrl</a></li> |
| <li><img alt="" src="../images/down.gif" /> <a href="#authzldapauthoritative">AuthzLDAPAuthoritative</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> |
| </ul><ul class="seealso"><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="#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="#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="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/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 the |
| 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/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.</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/core.html#require">Require</a></code> values may also |
| be used which may require loading additional authorization modules. |
| Note that if you use a <code class="directive"><a href="../mod/core.html#require">Require</a></code> |
| value from another authorization module, you will need to ensure that |
| <code class="directive"><a href="#authzldapauthoritative">AuthzLDAPAuthoritative</a></code> |
| is set to <code>off</code> to allow the authorization phase to fall |
| back to the module providing the alternate |
| <code class="directive"><a href="../mod/core.html#require">Require</a></code> value. When no |
| LDAP-specific <code class="directive"><a href="../mod/core.html#require">Require</a></code> directives |
| are used, authorization is allowed to fall back to other modules |
| as if <code class="directive"><a href="#authzldapauthoritative">AuthzLDAPAuthoritative</a></code> |
| was set to <code>off</code>. </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> |
| </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/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> |
| |
| <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=Airius?cn</code> (i.e., <code>cn</code> is |
| used for searches), the following Require directives could be used |
| to restrict access:</p> |
| <div class="example"><p><code> |
| Require ldap-user "Barbara Jenson"<br /> |
| Require ldap-user "Fred User"<br /> |
| Require ldap-user "Joe Manager"<br /> |
| </code></p></div> |
| |
| <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> |
| <div class="example"><p><code>Require ldap-user bjenson fuser jmanager</code></p></div> |
| |
| |
| <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"><p><code> |
| dn: cn=Administrators, o=Airius<br /> |
| objectClass: groupOfUniqueNames<br /> |
| uniqueMember: cn=Barbara Jenson, o=Airius<br /> |
| uniqueMember: cn=Fred User, o=Airius<br /> |
| </code></p></div> |
| |
| <p>The following directive would grant access to both Fred and |
| Barbara:</p> |
| <div class="example"><p><code>Require ldap-group cn=Administrators, o=Airius</code></p></div> |
| |
| <p>Behavior of this directive is modified by the <code class="directive"><a href="#authldapgroupattribute">AuthLDAPGroupAttribute</a></code> and |
| <code class="directive"><a href="#authldapgroupattributeisdn">AuthLDAPGroupAttributeIsDN</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> |
| <div class="example"><p><code>Require ldap-dn cn=Barbara Jenson, o=Airius</code></p></div> |
| |
| <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> |
| |
| <div class="example"><p><code>Require ldap-attribute employeeType=active</code></p></div> |
| |
| <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> |
| |
| <div class="example"><p><code>Require ldap-attribute city="San Jose" status=active</code></p></div> |
| |
| |
| |
| <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> |
| |
| <div class="example"><p><code>Require ldap-filter &(cell=*)(department=marketing)</code></p></div> |
| |
| <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. |
| <div class="example"><p><code> |
| AuthLDAPURL "ldap://ldap1.airius.com:389/ou=People, o=Airius?uid?sub?(objectClass=*)"<br /> |
| Require valid-user |
| </code></p></div> |
| </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. |
| <div class="example"><p><code>AuthLDAPURL "ldap://ldap1.airius.com ldap2.airius.com/ou=People, o=Airius"<br /> |
| Require valid-user |
| </code></p></div> |
| </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>. |
| <div class="example"><p><code> |
| AuthLDAPURL "ldap://ldap.airius.com/ou=People, o=Airius?cn"<br /> |
| Require valid-user |
| </code></p></div> |
| </li> |
| |
| <li> |
| Grant access to anybody in the Administrators group. The |
| users must authenticate using their UID. |
| <div class="example"><p><code> |
| AuthLDAPURL ldap://ldap.airius.com/o=Airius?uid<br /> |
| Require ldap-group cn=Administrators, o=Airius |
| </code></p></div> |
| </li> |
| |
| <li> |
| The next example assumes that everyone at Airius 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: |
| <div class="example"><p><code> |
| AuthLDAPURL ldap://ldap.airius.com/o=Airius?uid??(qpagePagerID=*)<br /> |
| Require valid-user |
| </code></p></div> |
| </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> |
| <div class="example"><p><code> |
| AuthLDAPURL ldap://ldap.airius.com/o=Airius?uid??(|(qpagePagerID=*)(uid=jmanager))<br /> |
| Require valid-user |
| </code></p></div> |
| |
| <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 authentication, 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>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="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> |
| <div class="example"><pre>AuthLDAPURL "the url" |
| AuthGroupFile <em>mygroupfile</em> |
| Require group <em>mygroupfile</em> |
| </pre></div> |
| |
| <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="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<em>off|on</em></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> |
| <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in versions later than 2.2.14</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"><a href="#authldapbindauthoritative">AuthLDAPBindAuthoritative</a></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 conjuction 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 2.2.25.</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"><a href="#authldapbindpassword">AuthLDAPBindPassword</a></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> |
| <div class="example"><pre>#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> |
| <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="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 check for group membership</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 group membership. 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=Airius</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=Airius</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="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 AuthLDAPRemoteUserIsDN. 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="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> |
| |
| <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.</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.</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.</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.airius.com/o=Airius?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> |
| |
| <p> When <code class="directive"><a href="#authldapurl">AuthLDAPURL</a></code> |
| is enabled in a particular context, but some other module has performed |
| authentication for the request, the server will try to map the username to a DN |
| during authorization regardless of whether or not LDAP-specific requirements |
| are present. To ignore the failures to map a username to a DN during |
| authorization, set <code class="directive"><a href="#authzldapauthoritative"> |
| AuthzLDAPAuthoritative</a></code> to "off".</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="AuthzLDAPAuthoritative" id="AuthzLDAPAuthoritative">AuthzLDAPAuthoritative</a> <a name="authzldapauthoritative" id="authzldapauthoritative">Directive</a></h2> |
| <table class="directive"> |
| <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Prevent other authentication modules from |
| authenticating the user if this one fails</td></tr> |
| <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthzLDAPAuthoritative on|off</code></td></tr> |
| <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthzLDAPAuthoritative 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>Set to <code>off</code> if this module should let other |
| authorization modules attempt to authorize the user, should |
| authorization with this module fail. Control is only passed on |
| to lower modules if there is no DN or rule that matches the |
| supplied user name (as passed by the client).</p> |
| <p> When no LDAP-specific <code class="directive"><a href="../mod/core.html#require">Require</a></code> directives |
| are used, authorization is allowed to fall back to other modules |
| as if <code class="directive"><a href="#authzldapauthoritative">AuthzLDAPAuthoritative</a></code> |
| was set to <code>off</code>. </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> |
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