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 <div id="page-content">
 <div id="preamble"><h1>Apache Module mod_authz_dbm</h1>
 <div class="toplang">
 <p><span>Available Languages: </span><a href="../en/mod/mod_authz_dbm.html" title="English">&nbsp;en&nbsp;</a> |
 <a href="../fr/mod/mod_authz_dbm.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
 <a href="../ko/mod/mod_authz_dbm.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
 </div>
 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Group authorization using DBM files</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>authz_dbm_module</td></tr>
 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authz_dbm.c</td></tr>
 <tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.1 and later</td></tr></table>
 <h3>Summary</h3>

     <p>This module provides authorization capabilities so that
        authenticated users can be allowed or denied access to portions
        of the web site by group membership. Similar functionality is
        provided by <code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code>.</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="#requiredirectives">The Require Directives</a></li>
 <li><img alt="" src="../images/down.gif" /> <a href="#examples">Example usage</a></li>
 </ul><h3 class="directives">Directives</h3>
 <ul id="toc">
 <li><img alt="" src="../images/down.gif" /> <a href="#authdbmgroupfile">AuthDBMGroupFile</a></li>
 <li><img alt="" src="../images/down.gif" /> <a href="#authzdbmtype">AuthzDBMType</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_dbm">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_authz_dbm">Report a bug</a></li></ul><h3>See also</h3>
 <ul class="seealso">
 <li><code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code></li>
 <li><a href="#comments_section">Comments</a></li></ul></div>
 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 <div class="section">
 <h2><a name="requiredirectives" id="requiredirectives">The Require Directives</a></h2>

     <p>Apache's <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code>
     directives are used during the authorization phase to ensure that
     a user is allowed to access a resource.  mod_authz_dbm extends the
     authorization types with <code>dbm-group</code>.</p>

     <p>Since v2.4.8, <a href="../expr.html">expressions</a> are supported
     within the DBM require directives.</p>

 <h3><a name="reqgroup" id="reqgroup">Require dbm-group</a></h3>

     <p>This directive specifies group membership that is required for the
     user to gain access.</p>

     <pre class="prettyprint lang-config">Require dbm-group admin</pre>


 <h3><a name="reqfilegroup" id="reqfilegroup">Require dbm-file-group</a></h3>

     <p>When this directive is specified, the user must be a member of the group
     assigned to the file being accessed.</p>

     <pre class="prettyprint lang-config">Require dbm-file-group</pre>


 </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">Example usage</a></h2>

 <p><em>Note that using mod_authz_dbm requires you to require <code>dbm-group</code>
 instead of <code>group</code>:</em>
 </p>
 <pre class="prettyprint lang-config">&lt;Directory "/foo/bar"&gt;
   AuthType Basic
   AuthName "Secure Area"
   AuthBasicProvider dbm
   AuthDBMUserFile "site/data/users"
   AuthDBMGroupFile "site/data/users"
   Require dbm-group admin
 &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="AuthDBMGroupFile" id="AuthDBMGroupFile">AuthDBMGroupFile</a> <a name="authdbmgroupfile" id="authdbmgroupfile">Directive</a></h2>
 <table class="directive">
 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the name of the database file containing the list
 of user groups for authorization</td></tr>
 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBMGroupFile <var>file-path</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>Extension</td></tr>
 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_dbm</td></tr>
 </table>
     <p>The <code class="directive">AuthDBMGroupFile</code> directive sets the
     name of a DBM file containing the list of user groups for user
     authorization.  <var>File-path</var> is the absolute path to the
     group file.</p>

     <p>The group file is keyed on the username. The value for a
     user is a comma-separated list of the groups to which the users
     belongs. There must be no whitespace within the value, and it
     must never contain any colons.</p>

     <div class="warning"><h3>Security</h3>
       <p>Make sure that the <code class="directive">AuthDBMGroupFile</code> is
       stored outside the document tree of the web-server. Do
       <strong>not</strong> put it in the directory that it protects.
       Otherwise, clients will be able to download the
       <code class="directive">AuthDBMGroupFile</code> unless otherwise
       protected.</p>
     </div>

     <p>Combining Group and Password DBM files: In some cases it is
     easier to manage a single database which contains both the
     password and group details for each user. This simplifies any
     support programs that need to be written: they now only have to
     deal with writing to and locking a single DBM file. This can be
     accomplished by first setting the group and password files to
     point to the same DBM:</p>

     <pre class="prettyprint lang-config">AuthDBMGroupFile "/www/userbase"
 AuthDBMUserFile "/www/userbase"</pre>


     <p>The key for the single DBM is the username. The value consists
     of</p>

     <div class="example"><p><code>
       Encrypted Password : List of Groups [ : (ignored) ]
     </code></p></div>

     <p>The password section contains the encrypted
     password as before. This is followed by a colon and the comma
     separated list of groups. Other data may optionally be left in the
     DBM file after another colon; it is ignored by the authorization
     module. This is what www.telescope.org uses for its combined
     password and group database.</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="AuthzDBMType" id="AuthzDBMType">AuthzDBMType</a> <a name="authzdbmtype" id="authzdbmtype">Directive</a></h2>
 <table class="directive">
 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the type of database file that is used to
 store list of user groups</td></tr>
 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthzDBMType default|SDBM|GDBM|NDBM|DB</code></td></tr>
 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthzDBMType default</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_authz_dbm</td></tr>
 </table>
     <p>Sets the type of database file that is used to store the list
     of user groups.
     The default database type is determined at compile time.  The
     availability of other types of database files also depends on
     <a href="../install.html#dbm">compile-time settings</a>.</p>

     <p>It is crucial that whatever program you use to create your group
     files is configured to use the same type of database.</p>

 </div>
 </div>
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	<p class="apache">Apache HTTP Server Version 2.4</p>
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	<div id="page-content">
	<div id="preamble"><h1>Apache Module mod_authz_dbm</h1>
	<div class="toplang">
	<p><span>Available Languages: </span><a href="../en/mod/mod_authz_dbm.html" title="English"> en </a> \|
	<a href="../fr/mod/mod_authz_dbm.html" hreflang="fr" rel="alternate" title="Français"> fr </a> \|
	<a href="../ko/mod/mod_authz_dbm.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
	</div>
	<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Group authorization using DBM files</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>authz_dbm_module</td></tr>
	<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authz_dbm.c</td></tr>
	<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.1 and later</td></tr></table>
	<h3>Summary</h3>

	<p>This module provides authorization capabilities so that
	authenticated users can be allowed or denied access to portions
	of the web site by group membership. Similar functionality is
	provided by <code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code>.</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="#requiredirectives">The Require Directives</a></li>
	<li><img alt="" src="../images/down.gif" /> <a href="#examples">Example usage</a></li>
	</ul><h3 class="directives">Directives</h3>
	<ul id="toc">
	<li><img alt="" src="../images/down.gif" /> <a href="#authdbmgroupfile">AuthDBMGroupFile</a></li>
	<li><img alt="" src="../images/down.gif" /> <a href="#authzdbmtype">AuthzDBMType</a></li>
	</ul>
	<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_authz_dbm">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_authz_dbm">Report a bug</a></li></ul><h3>See also</h3>
	<ul class="seealso">
	<li><code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code></li>
	<li><a href="#comments_section">Comments</a></li></ul></div>
	<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
	<div class="section">
	<h2><a name="requiredirectives" id="requiredirectives">The Require Directives</a></h2>

	<p>Apache's <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code>
	directives are used during the authorization phase to ensure that
	a user is allowed to access a resource. mod_authz_dbm extends the
	authorization types with <code>dbm-group</code>.</p>

	<p>Since v2.4.8, <a href="../expr.html">expressions</a> are supported
	within the DBM require directives.</p>

	<h3><a name="reqgroup" id="reqgroup">Require dbm-group</a></h3>

	<p>This directive specifies group membership that is required for the
	user to gain access.</p>

	<pre class="prettyprint lang-config">Require dbm-group admin</pre>




	<h3><a name="reqfilegroup" id="reqfilegroup">Require dbm-file-group</a></h3>

	<p>When this directive is specified, the user must be a member of the group
	assigned to the file being accessed.</p>

	<pre class="prettyprint lang-config">Require dbm-file-group</pre>




	</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">Example usage</a></h2>

	<p><em>Note that using mod_authz_dbm requires you to require <code>dbm-group</code>
	instead of <code>group</code>:</em>
	</p>
	<pre class="prettyprint lang-config"><Directory "/foo/bar">
	AuthType Basic
	AuthName "Secure Area"
	AuthBasicProvider dbm
	AuthDBMUserFile "site/data/users"
	AuthDBMGroupFile "site/data/users"
	Require dbm-group admin
	</Directory></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="AuthDBMGroupFile" id="AuthDBMGroupFile">AuthDBMGroupFile</a> <a name="authdbmgroupfile" id="authdbmgroupfile">Directive</a></h2>
	<table class="directive">
	<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the name of the database file containing the list
	of user groups for authorization</td></tr>
	<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBMGroupFile <var>file-path</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>Extension</td></tr>
	<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_dbm</td></tr>
	</table>
	<p>The <code class="directive">AuthDBMGroupFile</code> directive sets the
	name of a DBM file containing the list of user groups for user
	authorization. <var>File-path</var> is the absolute path to the
	group file.</p>

	<p>The group file is keyed on the username. The value for a
	user is a comma-separated list of the groups to which the users
	belongs. There must be no whitespace within the value, and it
	must never contain any colons.</p>

	<div class="warning"><h3>Security</h3>
	<p>Make sure that the <code class="directive">AuthDBMGroupFile</code> is
	stored outside the document tree of the web-server. Do
	<strong>not</strong> put it in the directory that it protects.
	Otherwise, clients will be able to download the
	<code class="directive">AuthDBMGroupFile</code> unless otherwise
	protected.</p>
	</div>

	<p>Combining Group and Password DBM files: In some cases it is
	easier to manage a single database which contains both the
	password and group details for each user. This simplifies any
	support programs that need to be written: they now only have to
	deal with writing to and locking a single DBM file. This can be
	accomplished by first setting the group and password files to
	point to the same DBM:</p>

	<pre class="prettyprint lang-config">AuthDBMGroupFile "/www/userbase"
	AuthDBMUserFile "/www/userbase"</pre>


	<p>The key for the single DBM is the username. The value consists
	of</p>

	<div class="example"><p><code>
	Encrypted Password : List of Groups [ : (ignored) ]
	</code></p></div>

	<p>The password section contains the encrypted
	password as before. This is followed by a colon and the comma
	separated list of groups. Other data may optionally be left in the
	DBM file after another colon; it is ignored by the authorization
	module. This is what www.telescope.org uses for its combined
	password and group database.</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="AuthzDBMType" id="AuthzDBMType">AuthzDBMType</a> <a name="authzdbmtype" id="authzdbmtype">Directive</a></h2>
	<table class="directive">
	<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the type of database file that is used to
	store list of user groups</td></tr>
	<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthzDBMType default\|SDBM\|GDBM\|NDBM\|DB</code></td></tr>
	<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthzDBMType default</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_authz_dbm</td></tr>
	</table>
	<p>Sets the type of database file that is used to store the list
	of user groups.
	The default database type is determined at compile time. The
	availability of other types of database files also depends on
	<a href="../install.html#dbm">compile-time settings</a>.</p>

	<p>It is crucial that whatever program you use to create your group
	files is configured to use the same type of database.</p>

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