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  this work for additional information regarding copyright ownership.
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<%
  response.setHeader("WWW-Authenticate", "Basic realm=\"Tomcat Host Manager Application\"");
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
 <head>
  <title>403 Access Denied</title>
  <style type="text/css">
    <!--
    BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;font-size:12px;}
    H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;}
    PRE, TT {border: 1px dotted #525D76}
    A {color : black;}A.name {color : black;}
    -->
  </style>
 </head>
 <body>
   <h1>403 Access Denied</h1>
   <p>
    You are not authorized to view this page.
   </p>
   <p>
    If you have already configured the Host Manager application to allow access
    and you have used your browser's back button, used a saved book-mark or
    similar then you may have triggered the cross-site request forgery (CSRF)
    protection that has been enabled for the HTML interface of the Host Manager
    application. You will need to reset this protection by returning to the 
    <a href="<%=request.getContextPath()%>/html">main Host Manager page</a>.
    Once you return to this page, you will be able to continue using the Host
    Manager appliction's HTML interface normally. If you continue to see this
    access denied message, check that you have the necessary permissions to
    access this application.
   </p>
   <p> If you have not changed
    any configuration files, please examine the file
    <tt>conf/tomcat-users.xml</tt> in your installation. That
    file must contain the credentials to let you use this webapp.
   </p>
   <p>
    For example, to add the <tt>admin-gui</tt> role to a user named
    <tt>tomcat</tt> with a password of <tt>s3cret</tt>, add the following to the
    config file listed above.
   </p>
<pre>
&lt;role rolename="admin-gui"/&gt;
&lt;user username="tomcat" password="s3cret" roles="admin-gui"/&gt;
</pre>
   <p>
    Note that for Tomcat 6.0.30 onwards, the roles required to use the host
    manager application were changed from the single <tt>admin</tt> role to the
    following two roles. You will need to assign the role(s) required for
    the functionality you wish to access. Note the <tt>admin</tt> role is still
    valid but by-passes the CSRF protection.
   </p>
    <ul>
      <li><tt>admin-gui</tt> - allows access to the HTML GUI</li>
      <li><tt>admin-script</tt> - allows access to the text interface</li>
    </ul>
   <p>
    The HTML interface is protected against CSRF but the text interface is not.
    To maintain the CSRF protection:
   </p>
   <ul>
    <li>The deprecated <tt>admin</tt> role should not be assigned to any
        user.</li>
    <li>Users with the <tt>admin-gui</tt> role should not be granted the
       <tt>manager-script</tt> role.</li>
    <li>If the text interface is accessed through a browser (e.g. for testing
        since this interface is intended for tools not humans) then the browser
        must be closed afterwards to terminate the session.</li>
   </ul>
 </body>

</html>
