<?xml version="1.0" encoding="UTF-8"?>
<!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=UTF-8" http-equiv="Content-Type" />
<!--
        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
              This file is generated from xml source: DO NOT EDIT
        XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
      -->
<title>mod_authz_core - Apache HTTP Server Version 2.4</title>
<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" />
<script src="../style/scripts/prettify.min.js" type="text/javascript">
</script>

<link href="../images/favicon.ico" rel="shortcut icon" /></head>
<body>
<div id="page-header">
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
<p class="apache">Apache HTTP Server Version 2.4</p>
<img alt="" src="../images/feather.png" /></div>
<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
<div id="path">
<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Modules</a></div>
<div id="page-content">
<div id="preamble"><h1>Apache Module mod_authz_core</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_authz_core.html" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/mod/mod_authz_core.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Core Authorization</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>authz_core_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authz_core.c</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTPD 2.3 and later</td></tr></table>
<h3>Summary</h3>

    <p>This module provides core authorization capabilities so that
    authenticated users can be allowed or denied access to portions
    of the web site. <code class="module"><a href="../mod/mod_authz_core.html">mod_authz_core</a></code> provides the
    functionality to register various authorization providers. It is
    usually used in conjunction with an authentication
    provider module such as <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> and an
    authorization module such as <code class="module"><a href="../mod/mod_authz_user.html">mod_authz_user</a></code>. It
    also allows for advanced logic to be applied to the
    authorization processing.</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="#logic">Authorization Containers</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="#authzalias">Creating Authorization Provider Aliases</a></li>
</ul><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#authmerging">AuthMerging</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authzprovideralias">&lt;AuthzProviderAlias&gt;</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#authzsendforbiddenonfailure">AuthzSendForbiddenOnFailure</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#require">Require</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#requireall">&lt;RequireAll&gt;</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#requireany">&lt;RequireAny&gt;</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#requirenone">&lt;RequireNone&gt;</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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_authz_core">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_authz_core">Report a bug</a></li></ul><h3>See also</h3>
<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="logic" id="logic">Authorization Containers</a></h2>

    <p>The authorization container directives
    <code class="directive"><a href="#requireall">&lt;RequireAll&gt;</a></code>,
    <code class="directive"><a href="#requireany">&lt;RequireAny&gt;</a></code>
    and
    <code class="directive"><a href="#requirenone">&lt;RequireNone&gt;</a></code>
    may be combined with each other and with the
    <code class="directive"><a href="#require">Require</a></code>
    directive to express complex authorization logic.</p>

    <p>The example below expresses the following authorization logic.
    In order to access the resource, the user must either be the
    <code>superadmin</code> user, or belong to both the
    <code>admins</code> group and the <code>Administrators</code> LDAP
    group and either belong to the <code>sales</code> group or
    have the LDAP <code>dept</code> attribute <code>sales</code>.
    Furthermore, in order to access the resource, the user must
    not belong to either the <code>temps</code> group or the
    LDAP group <code>Temporary Employees</code>.</p>

    <pre class="prettyprint lang-config">&lt;Directory "/www/mydocs"&gt;
    &lt;RequireAll&gt;
        &lt;RequireAny&gt;
            Require user superadmin
            &lt;RequireAll&gt;
                Require group admins
                Require ldap-group "cn=Administrators,o=Airius"
                &lt;RequireAny&gt;
                    Require group sales
                    Require ldap-attribute dept="sales"
                &lt;/RequireAny&gt;
            &lt;/RequireAll&gt;
        &lt;/RequireAny&gt;
        &lt;RequireNone&gt;
            Require group temps
            Require ldap-group "cn=Temporary Employees,o=Airius"
        &lt;/RequireNone&gt;
    &lt;/RequireAll&gt;
&lt;/Directory&gt;</pre>

</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><code class="module"><a href="../mod/mod_authz_core.html">mod_authz_core</a></code> provides some generic authorization
  providers which can be used with the
  <code class="directive"><a href="#require">Require</a></code> directive.</p>

  <h3><a name="reqenv" id="reqenv">Require env</a></h3>

    <p>The <code>env</code> provider allows access to the server
    to be controlled based on the existence of an <a href="../env.html">environment variable</a>. When <code>Require
    env <var>env-variable</var></code> is specified, then the request is
    allowed access if the environment variable <var>env-variable</var>
    exists. The server provides the ability to set environment
    variables in a flexible way based on characteristics of the client
    request using the directives provided by
    <code class="module"><a href="../mod/mod_setenvif.html">mod_setenvif</a></code>. Therefore, this directive can be
    used to allow access based on such factors as the clients
    <code>User-Agent</code> (browser type), <code>Referer</code>, or
    other HTTP request header fields.</p>

    <pre class="prettyprint lang-config">SetEnvIf User-Agent "^KnockKnock/2\.0" let_me_in
&lt;Directory "/docroot"&gt;
    Require env let_me_in
&lt;/Directory&gt;</pre>


    <p>In this case, browsers with a user-agent string beginning
    with <code>KnockKnock/2.0</code> will be allowed access, and all
    others will be denied.</p>

    <p>When the server looks up a path via an internal
    <a class="glossarylink" href="../glossary.html#subrequest" title="see glossary">subrequest</a> such as looking
    for a <code class="directive"><a href="../mod/mod_dir.html#directoryindex">DirectoryIndex</a></code>
    or generating a directory listing with <code class="module"><a href="../mod/mod_autoindex.html">mod_autoindex</a></code>,
    per-request environment variables are <em>not</em> inherited in the
    subrequest. Additionally,
    <code class="directive"><a href="../mod/mod_setenvif.html#setenvif">SetEnvIf</a></code> directives
    are not separately evaluated in the subrequest due to the API phases
    <code class="module"><a href="../mod/mod_setenvif.html">mod_setenvif</a></code> takes action in.</p>

  

  <h3><a name="reqall" id="reqall">Require all</a></h3>

    <p>The <code>all</code> provider mimics the functionality that
    was previously provided by the 'Allow from all' and 'Deny from all'
    directives.  This provider can take one of two arguments which are
    'granted' or 'denied'.  The following examples will grant or deny
    access to all requests.</p>

    <pre class="prettyprint lang-config">Require all granted</pre>


    <pre class="prettyprint lang-config">Require all denied</pre>


  

  <h3><a name="reqmethod" id="reqmethod">Require method</a></h3>

    <p>The <code>method</code> provider allows using the HTTP method in
    authorization decisions. The GET and HEAD methods are treated as
    equivalent. The TRACE method is not available to this provider,
    use <code class="directive"><a href="../mod/core.html#traceenable">TraceEnable</a></code> instead.</p>

    <p>The following example will only allow GET, HEAD, POST, and OPTIONS
    requests:</p>

    <pre class="prettyprint lang-config">Require method GET POST OPTIONS</pre>


    <p>The following example will allow GET, HEAD, POST, and OPTIONS
    requests without authentication, and require a valid user for all other
    methods:</p>

    <pre class="prettyprint lang-config">&lt;RequireAny&gt;
     Require method GET POST OPTIONS
     Require valid-user
&lt;/RequireAny&gt;</pre>


  

  <h3><a name="reqexpr" id="reqexpr">Require expr</a></h3>

  <p>The <code>expr</code> provider allows basing authorization
  decisions on arbitrary expressions.</p>

    <pre class="prettyprint lang-config">Require expr "%{TIME_HOUR} -ge 9 &amp;&amp; %{TIME_HOUR} -le 17"</pre>


    <pre class="prettyprint lang-config">&lt;RequireAll&gt;
    Require expr "!(%{QUERY_STRING} =~ /secret/)"
    Require expr "%{REQUEST_URI} in { '/example.cgi', '/other.cgi' }"
&lt;/RequireAll&gt;</pre>


    <pre class="prettyprint lang-config">Require expr "!(%{QUERY_STRING} =~ /secret/) &amp;&amp; %{REQUEST_URI} in { '/example.cgi', '/other.cgi' }"</pre>


  <p>The syntax is described in the <a href="../expr.html">ap_expr</a>
  documentation. Before httpd 2.4.16, the surrounding double-quotes MUST be
  omitted.</p>

  <p>Normally, the expression is evaluated before authentication. However, if
  the expression returns false and references the variable
  <code>%{REMOTE_USER}</code>, authentication will be performed and
  the expression will be re-evaluated.</p>

  


</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="authzalias" id="authzalias">Creating Authorization Provider Aliases</a></h2>

    <p>Extended authorization providers can be created within the configuration
    file and assigned an alias name.  The alias providers can then be referenced
    through the <code class="directive"><a href="#require">Require</a></code> directive
    in the same way as a base authorization provider.  Besides the ability to
    create and alias an extended provider, it also allows the same extended
    authorization provider to be referenced by multiple locations.
    </p>

    <h3><a name="example" id="example">Example</a></h3>
        <p>The example below creates two different ldap authorization provider
        aliases based on the ldap-group authorization provider.  This example
        allows a single authorization location to check group membership within
        multiple ldap hosts:
        </p>

        <pre class="prettyprint lang-config">&lt;AuthzProviderAlias ldap-group ldap-group-alias1 "cn=my-group,o=ctx"&gt;
    AuthLDAPBindDN "cn=youruser,o=ctx"
    AuthLDAPBindPassword yourpassword
    AuthLDAPUrl "ldap://ldap.host/o=ctx"
&lt;/AuthzProviderAlias&gt;

&lt;AuthzProviderAlias ldap-group ldap-group-alias2 "cn=my-other-group,o=dev"&gt;
    AuthLDAPBindDN "cn=yourotheruser,o=dev"
    AuthLDAPBindPassword yourotherpassword
    AuthLDAPUrl "ldap://other.ldap.host/o=dev?cn"
&lt;/AuthzProviderAlias&gt;

Alias "/secure" "/webpages/secure"
&lt;Directory "/webpages/secure"&gt;
    Require all granted

    AuthBasicProvider file

    AuthType Basic
    AuthName LDAP_Protected_Place

    #implied OR operation
    Require ldap-group-alias1
    Require ldap-group-alias2
&lt;/Directory&gt;</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="AuthMerging" id="AuthMerging">AuthMerging</a> <a name="authmerging" id="authmerging">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Controls the manner in which each configuration section's
authorization logic is combined with that of preceding configuration
sections.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthMerging Off | And | Or</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthMerging 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>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_core</td></tr>
</table>
    <p>When authorization is enabled, it is normally inherited by each
    subsequent <a href="../sections.html#merging">configuration section</a>,
    unless a different set of authorization directives is specified.
    This is the default action, which corresponds to an explicit setting
    of <code>AuthMerging Off</code>.</p>

    <p>However, there may be circumstances in which it is desirable
    for a configuration section's authorization to be combined with
    that of its predecessor while configuration sections are being
    merged.  Two options are available for this case, <code>And</code>
    and <code>Or</code>.</p>

    <p>When a configuration section contains <code>AuthMerging And</code>
    or <code>AuthMerging Or</code>,
    its authorization logic is combined with that of the nearest
    predecessor (according to the overall order of configuration sections)
    which also contains authorization logic as if the two sections
    were jointly contained within a
    <code class="directive"><a href="#requireall">&lt;RequireAll&gt;</a></code> or
    <code class="directive"><a href="#requireany">&lt;RequireAny&gt;</a></code>
    directive, respectively.</p>

    <div class="note">The setting of <code class="directive">AuthMerging</code> is not
    inherited outside of the configuration section in which it appears.
    In the following example, only users belonging to group <code>alpha</code>
    may access <code>/www/docs</code>.  Users belonging to either
    groups <code>alpha</code> or <code>beta</code> may access
    <code>/www/docs/ab</code>.  However, the default <code>Off</code>
    setting of <code class="directive">AuthMerging</code> applies to the
    <code class="directive"><a href="../mod/core.html#directory">&lt;Directory&gt;</a></code>
    configuration section for <code>/www/docs/ab/gamma</code>, so
    that section's authorization directives override those of the
    preceding sections.  Thus only users belong to the group
    <code>gamma</code> may access <code>/www/docs/ab/gamma</code>.</div>

    <pre class="prettyprint lang-config">&lt;Directory "/www/docs"&gt;
    AuthType Basic
    AuthName Documents
    AuthBasicProvider file
    AuthUserFile "/usr/local/apache/passwd/passwords"
    Require group alpha
&lt;/Directory&gt;

&lt;Directory "/www/docs/ab"&gt;
    AuthMerging Or
    Require group beta
&lt;/Directory&gt;

&lt;Directory "/www/docs/ab/gamma"&gt;
    Require group gamma
&lt;/Directory&gt;</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="AuthzProviderAlias" id="AuthzProviderAlias">&lt;AuthzProviderAlias&gt;</a> <a name="authzprovideralias" id="authzprovideralias">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enclose a group of directives that represent an
extension of a base authorization provider and referenced by the specified
alias</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>&lt;AuthzProviderAlias <var>baseProvider Alias Require-Parameters</var>&gt;
... &lt;/AuthzProviderAlias&gt;
</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_core</td></tr>
</table>
    <p><code class="directive">&lt;AuthzProviderAlias&gt;</code> and
    <code>&lt;/AuthzProviderAlias&gt;</code> are used to enclose a group of
    authorization directives that can be referenced by the alias name using the
    directive <code class="directive"><a href="#require">Require</a></code>.</p>

    <p>If several parameters are needed in <var>Require-Parameters</var>,
    they must be enclosed in quotation marks.  Otherwise, only the first one
    is taken into account.</p>
    
    <pre class="prettyprint lang-config"># In this example, for both addresses to be taken into account, they MUST be enclosed
# between quotation marks
&lt;AuthzProviderAlias ip reject-ips "XXX.XXX.XXX.XXX YYY.YYY.YYY.YYY"&gt;
&lt;/AuthzProviderAlias&gt;

&lt;Directory "/path/to/dir"&gt;
    &lt;RequireAll&gt;
        Require not reject-ips
        Require all granted
    &lt;/RequireAll&gt;
&lt;/Directory&gt;</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="AuthzSendForbiddenOnFailure" id="AuthzSendForbiddenOnFailure">AuthzSendForbiddenOnFailure</a> <a name="authzsendforbiddenonfailure" id="authzsendforbiddenonfailure">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Send '403 FORBIDDEN' instead of '401 UNAUTHORIZED' if
authentication succeeds but authorization fails
</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthzSendForbiddenOnFailure On|Off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthzSendForbiddenOnFailure 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#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_core</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTPD 2.3.11 and later</td></tr>
</table>
    <p>If authentication succeeds but authorization fails, Apache HTTPD will
    respond with an HTTP response code of '401 UNAUTHORIZED' by default. This
    usually causes browsers to display the password dialogue to the user
    again, which is not wanted in all situations.
    <code class="directive">AuthzSendForbiddenOnFailure</code> allows to change the
    response code to '403 FORBIDDEN'.</p>

    <div class="warning"><h3>Security Warning</h3>
    <p>Modifying the response in case of missing authorization weakens the
    security of the password, because it reveals to a possible attacker, that
    his guessed password was right.</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="Require" id="Require">Require</a> <a name="require" id="require">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Tests whether an authenticated user is authorized by
an authorization provider.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Require [not] <var>entity-name</var>
    [<var>entity-name</var>] ...</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_core</td></tr>
</table>
    <p>This directive tests whether an authenticated user is authorized
    according to a particular authorization provider and the specified
    restrictions. <code class="module"><a href="../mod/mod_authz_core.html">mod_authz_core</a></code> provides the following
    generic authorization providers:</p>

    <dl>
      <dt><code>Require all granted</code></dt>
      <dd>Access is allowed unconditionally.</dd>

      <dt><code>Require all denied</code></dt>
      <dd>Access is denied unconditionally.</dd>

      <dt><code>Require env <var>env-var</var> [<var>env-var</var>]
      ...</code></dt>
      <dd>Access is allowed only if one of the given environment variables is
          set.</dd>

      <dt><code>Require method <var>http-method</var> [<var>http-method</var>]
      ...</code></dt>
      <dd>Access is allowed only for the given HTTP methods.</dd>

      <dt><code>Require expr <var>expression</var> </code></dt>
      <dd>Access is allowed if <var>expression</var> evaluates to true.</dd>
    </dl>

    <p>Some of the allowed syntaxes provided by <code class="module"><a href="../mod/mod_authz_user.html">mod_authz_user</a></code>,
       <code class="module"><a href="../mod/mod_authz_host.html">mod_authz_host</a></code>,
       and <code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code> are:</p>

    <dl>
      <dt><code>Require user <var>userid</var> [<var>userid</var>]
      ...</code></dt>
      <dd>Only the named users can access the resource.</dd>

      <dt><code>Require group <var>group-name</var> [<var>group-name</var>]
      ...</code></dt>
      <dd>Only users in the named groups can access the resource.</dd>

      <dt><code>Require valid-user</code></dt>
      <dd>All valid users can access the resource.</dd>

      <dt><code>Require ip 10 172.20 192.168.2</code></dt>
      <dd>Clients in the specified IP address ranges can access the
      resource.</dd>

      <dt><code>Require forward-dns dynamic.example.org</code></dt>
      <dd>A client the IP of which is resolved from the name dynamic.example.org will be granted access.
      </dd>

    </dl>

    <p>Other authorization modules that implement require options
    include <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code>,
    <code class="module"><a href="../mod/mod_authz_dbm.html">mod_authz_dbm</a></code>, <code class="module"><a href="../mod/mod_authz_dbd.html">mod_authz_dbd</a></code>,
    <code class="module"><a href="../mod/mod_authz_owner.html">mod_authz_owner</a></code> and <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code>.</p>

    <p>In most cases, for a complete authentication and authorization
    configuration, <code class="directive">Require</code> must be accompanied by
    <code class="directive"><a href="../mod/mod_authn_core.html#authname">AuthName</a></code>, <code class="directive"><a href="../mod/mod_authn_core.html#authtype">AuthType</a></code> and
    <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> or
    <code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code>
    directives, and directives such as
    <code class="directive"><a href="../mod/mod_authn_file.html#authuserfile">AuthUserFile</a></code>
    and <code class="directive"><a href="../mod/mod_authz_groupfile.html#authgroupfile">AuthGroupFile</a></code> (to
    define users and groups) in order to work correctly. Example:</p>

    <pre class="prettyprint lang-config">AuthType Basic
AuthName "Restricted Resource"
AuthBasicProvider file
AuthUserFile "/web/users"
AuthGroupFile "/web/groups"
Require group admin</pre>


    <p>Access controls which are applied in this way are effective for
    <strong>all</strong> methods. <strong>This is what is normally
    desired.</strong> If you wish to apply access controls only to
    specific methods, while leaving other methods unprotected, then
    place the <code class="directive">Require</code> statement into a
    <code class="directive"><a href="../mod/core.html#limit">&lt;Limit&gt;</a></code>
    section.</p>

    <p>The result of the <code class="directive">Require</code> directive
    may be negated through the use of the
    <code>not</code> option.  As with the other negated authorization
    directive <code class="directive">&lt;RequireNone&gt;</code>,
    when the <code class="directive">Require</code> directive is negated it can
    only fail or return a neutral result, and therefore may never
    independently authorize a request.</p>

    <p>In the following example, all users in the <code>alpha</code>
    and <code>beta</code> groups are authorized, except for those who
    are also in the <code>reject</code> group.</p>

    <pre class="prettyprint lang-config">&lt;Directory "/www/docs"&gt;
    &lt;RequireAll&gt;
        Require group alpha beta
        Require not group reject
    &lt;/RequireAll&gt;
&lt;/Directory&gt;</pre>


    <p>When multiple <code class="directive">Require</code> directives are
    used in a single
    <a href="../sections.html#merging">configuration section</a>
    and are not contained in another authorization directive like
    <code class="directive"><a href="#requireall">&lt;RequireAll&gt;</a></code>,
    they are implicitly contained within a
    <code class="directive"><a href="#requireany">&lt;RequireAny&gt;</a></code>
    directive.  Thus the first one to authorize a user authorizes the
    entire request, and subsequent <code class="directive">Require</code> directives
    are ignored.</p>

    <div class="warning"><h3>Security Warning</h3>
    <p>Exercise caution when setting authorization directives in
    <code class="directive"><a href="../mod/core.html#location">Location</a></code> sections
    that overlap with content served out of the filesystem.
    By default, these <a href="../sections.html#merging">configuration sections</a> overwrite authorization configuration
    in <code class="directive"><a href="../mod/core.html#directory">Directory</a></code>,
    and <code class="directive"><a href="../mod/core.html#files">Files</a></code> sections.</p>
    <p>The <code class="directive"><a href="#authmerging">AuthMerging</a></code> directive
    can be used to control how authorization configuration sections are
    merged.</p>
    </div>

<h3>See also</h3>
<ul>
<li><a href="../howto/access.html">Access Control howto</a></li>
<li><a href="#logic">Authorization Containers</a></li>
<li><code class="module"><a href="../mod/mod_authn_core.html">mod_authn_core</a></code></li>
<li><code class="module"><a href="../mod/mod_authz_host.html">mod_authz_host</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="RequireAll" id="RequireAll">&lt;RequireAll&gt;</a> <a name="requireall" id="requireall">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enclose a group of authorization directives of which none
must fail and at least one must succeed for the enclosing directive to
succeed.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>&lt;RequireAll&gt; ... &lt;/RequireAll&gt;</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_core</td></tr>
</table>
    <p><code class="directive">&lt;RequireAll&gt;</code> and
    <code>&lt;/RequireAll&gt;</code> are used to enclose a group of
    authorization directives of which none must fail and at least one
    must succeed in order for
    the <code class="directive">&lt;RequireAll&gt;</code> directive to
    succeed.</p>

    <p>If none of the directives contained within the
    <code class="directive">&lt;RequireAll&gt;</code> directive fails,
    and at least one succeeds, then the
    <code class="directive">&lt;RequireAll&gt;</code> directive
    succeeds.  If none succeed and none fail, then it returns a
    neutral result.  In all other cases, it fails.</p>

<h3>See also</h3>
<ul>
<li><a href="#logic">Authorization Containers</a></li>
<li><a href="../howto/auth.html">Authentication, Authorization,
    and Access Control</a></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="RequireAny" id="RequireAny">&lt;RequireAny&gt;</a> <a name="requireany" id="requireany">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enclose a group of authorization directives of which one
must succeed for the enclosing directive to succeed.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>&lt;RequireAny&gt; ... &lt;/RequireAny&gt;</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_core</td></tr>
</table>
    <p><code class="directive">&lt;RequireAny&gt;</code> and
    <code>&lt;/RequireAny&gt;</code> are used to enclose a group of
    authorization directives of which one must succeed in order for
    the <code class="directive">&lt;RequireAny&gt;</code> directive to
    succeed.</p>

    <p>If one or more of the directives contained within the
    <code class="directive">&lt;RequireAny&gt;</code> directive succeed,
    then the <code class="directive">&lt;RequireAny&gt;</code> directive
    succeeds.  If none succeed and none fail, then it returns a
    neutral result.  In all other cases, it fails.</p>

    <div class="note">Because negated authorization directives are unable to
    return a successful result, they can not significantly influence
    the result of a <code class="directive">&lt;RequireAny&gt;</code>
    directive.  (At most they could cause the directive to fail in
    the case where they failed and all other directives returned a
    neutral value.)  Therefore negated authorization directives
    are not permitted within a <code class="directive">&lt;RequireAny&gt;</code>
    directive.</div>

<h3>See also</h3>
<ul>
<li><a href="#logic">Authorization Containers</a></li>
<li><a href="../howto/auth.html">Authentication, Authorization,
    and Access Control</a></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="RequireNone" id="RequireNone">&lt;RequireNone&gt;</a> <a name="requirenone" id="requirenone">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enclose a group of authorization directives of which none
must succeed for the enclosing directive to not fail.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>&lt;RequireNone&gt; ... &lt;/RequireNone&gt;</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_core</td></tr>
</table>
    <p><code class="directive">&lt;RequireNone&gt;</code> and
    <code>&lt;/RequireNone&gt;</code> are used to enclose a group of
    authorization directives of which none must succeed
    in order for the
    <code class="directive">&lt;RequireNone&gt;</code> directive to
    not fail.</p>

    <p>If one or more of the directives contained within the
    <code class="directive">&lt;RequireNone&gt;</code> directive succeed,
    then the <code class="directive">&lt;RequireNone&gt;</code> directive
    fails.  In all other cases, it returns a neutral result.  Thus as with
    the other negated authorization directive <code>Require not</code>,
    it can never independently
    authorize a request because it can never return a successful result.
    It can be used, however, to restrict the set of users who are
    authorized to access a resource.</p>

    <div class="note">Because negated authorization directives are unable to
    return a successful result, they can not significantly influence
    the result of a <code class="directive">&lt;RequireNone&gt;</code>
    directive.  Therefore negated authorization directives
    are not permitted within a
    <code class="directive">&lt;RequireNone&gt;</code> directive.</div>

<h3>See also</h3>
<ul>
<li><a href="#logic">Authorization Containers</a></li>
<li><a href="../howto/auth.html">Authentication, Authorization,
    and Access Control</a></li>
</ul>
</div>
</div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/mod/mod_authz_core.html" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/mod/mod_authz_core.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</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&amp;A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
<script type="text/javascript"><!--//--><![CDATA[//><!--
var comments_shortname = 'httpd';
var comments_identifier = 'http://httpd.apache.org/docs/2.4/mod/mod_authz_core.html';
(function(w, d) {
    if (w.location.hostname.toLowerCase() == "httpd.apache.org") {
        d.write('<div id="comments_thread"><\/div>');
        var s = d.createElement('script');
        s.type = 'text/javascript';
        s.async = true;
        s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
        (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
    }
    else { 
        d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>');
    }
})(window, document);
//--><!]]></script></div><div id="footer">
<p class="apache">Copyright 2021 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!--
if (typeof(prettyPrint) !== 'undefined') {
    prettyPrint();
}
//--><!]]></script>
</body></html>