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<modulesynopsis metafile="mod_auth_anon.xml.meta">

<name>mod_auth_anon</name>
<description>Allows "anonymous" user access to authenticated
areas</description>
<status>Extension</status>
<sourcefile>mod_auth_anon.c</sourcefile>
<identifier>auth_anon_module</identifier>
<compatibility>Available only in versions prior to 2.1</compatibility>

<summary>
    <p>This module does access control in a manner similar to
    anonymous-ftp sites; <em>i.e.</em> have a 'magic' user id
    'anonymous' and the email address as a password. These email
    addresses can be logged.</p>

    <p>Combined with other (database) access control methods, this
    allows for effective user tracking and customization according
    to a user profile while still keeping the site open for
    'unregistered' users. One advantage of using Auth-based user
    tracking is that, unlike magic-cookies and funny URL
    pre/postfixes, it is completely browser independent and it
    allows users to share URLs.</p>
</summary>

<section id="example"><title>Example</title>

    <p>The example below (when combined with the Auth directives of a
    htpasswd-file based (or GDM, mSQL etc.) base access
    control system allows users in as 'guests' with the following
    properties:</p>

    <ul>
      <li>It insists that the user enters a userId.
      (<code>Anonymous_NoUserId</code>)</li>

      <li>It insists that the user enters a password.
      (<code>Anonymous_MustGiveEmail</code>)</li>

      <li>The password entered must be a valid email address, ie.
      contain at least one '@' and a '.'.
      (<code>Anonymous_VerifyEmail</code>)</li>

      <li>The userID must be one of <code>anonymous guest www test
      welcome</code> and comparison is <strong>not</strong> case
      sensitive.</li>

      <li>And the Email addresses entered in the passwd field are
      logged to the error log file
      (<code>Anonymous_LogEmail</code>)</li>
    </ul>

    <example><title>Excerpt of httpd.conf:</title>
      Anonymous_NoUserId off<br />
      Anonymous_MustGiveEmail on<br />
      Anonymous_VerifyEmail on<br />
      Anonymous_LogEmail on<br />
      Anonymous anonymous guest www test welcome<br />
      <br />
      AuthName "Use 'anonymous' &amp; Email address for guest entry"<br />
      AuthType basic<br />
      <br />
      # An
      AuthUserFile/AuthDBUserFile/AuthDBMUserFile<br />
      # directive must be specified, or use<br />
      # Anonymous_Authoritative for public access.<br />
      # In the .htaccess for the public directory, add:<br />
      &lt;Files *&gt;<br />
      <indent>
        Order Deny,Allow<br />
        Allow from all<br />
        <br />
        Require valid-user<br />
      </indent>
      &lt;/Files&gt;
    </example>
</section>

<directivesynopsis>
<name>Anonymous</name>
<description>Specifies userIDs that areallowed access without
password verification</description>
<syntax>Anonymous <var>user</var> [<var>user</var>] ...</syntax>
<contextlist><context>directory</context><context>.htaccess</context>
</contextlist>
<override>AuthConfig</override>

<usage>
    <p>A list of one or more 'magic' userIDs which are allowed
    access without password verification. The userIDs are space
    separated. It is possible to use the ' and " quotes to allow a
    space in a userID as well as the \ escape character.</p>

    <p>Please note that the comparison is
    <strong>case-IN-sensitive</strong>.<br />
     I strongly suggest that the magic username
    '<code>anonymous</code>' is always one of the allowed
    userIDs.</p>

    <example><title>Example:</title>
      Anonymous anonymous "Not Registered" "I don't know"
    </example>

    <p>This would allow the user to enter without password
    verification by using the userIDs "anonymous",
    "AnonyMous", "Not Registered" and "I Don't Know".</p>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>Anonymous_Authoritative</name>
<description>Configures if authorization will fall-through
to other methods</description>
<syntax>Anonymous_Authoritative On|Off</syntax>
<default>Anonymous_Authoritative Off</default>
<contextlist><context>directory</context><context>.htaccess</context>
</contextlist>
<override>AuthConfig</override>

<usage>
    <p>When set <code>On</code>, there is no fall-through to other
    authentication methods. So if a userID does not match the values
    specified in the <directive module="mod_auth_anon">Anonymous</directive>
    directive, access is denied.</p>

    <p>Be sure you know what you are doing when you decide to
    switch it on. And remember that the order in which the Authentication
    modules are queried is defined in the modules.c files at compile
    time.</p>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>Anonymous_LogEmail</name>
<description>Sets whether the password entered will be logged in the
error log</description>
<syntax>Anonymous_LogEmail On|Off</syntax>
<default>Anonymous_LogEmail On</default>
<contextlist><context>directory</context><context>.htaccess</context>
</contextlist>
<override>AuthConfig</override>

<usage>
    <p>When set <code>On</code>, the default, the 'password' entered
    (which hopefully contains a sensible email address) is logged in
    the error log.</p>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>Anonymous_MustGiveEmail</name>
<description>Specifies whether blank passwords are allowed</description>
<syntax>Anonymous_MustGiveEmail On|Off</syntax>
<default>Anonymous_MustGiveEmail On</default>
<contextlist><context>directory</context><context>.htaccess</context>
</contextlist>
<override>AuthConfig</override>

<usage>
    <p>Specifies whether the user must specify an email address as
    the password. This prohibits blank passwords.</p>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>Anonymous_NoUserID</name>
<description>Sets whether the userID field may be empty</description>
<syntax>Anonymous_NoUserID On|Off</syntax>
<default>Anonymous_NoUserID Off</default>
<contextlist><context>directory</context><context>.htaccess</context>
</contextlist>
<override>AuthConfig</override>

<usage>
    <p>When set <code>On</code>, users can leave the userID (and
    perhaps the password field) empty. This can be very convenient for
    MS-Explorer users who can just hit return or click directly on the
    OK button; which seems a natural reaction.</p>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>Anonymous_VerifyEmail</name>
<description>Sets whether to check the password field for a correctly
formatted email address</description>
<syntax>Anonymous_VerifyEmail On|Off</syntax>
<default>Anonymous_VerifyEmail Off</default>
<contextlist><context>directory</context><context>.htaccess</context>
</contextlist>
<override>AuthConfig</override>

<usage>
    <p>When set <code>On</code> the 'password' entered is checked for
    at least one '@' and a '.' to encourage users to enter valid email
    addresses (see the above <directive
    module="mod_auth_anon">Anonymous_LogEmail</directive>).</p>
</usage>
</directivesynopsis>

</modulesynopsis>
