   element), the requests to either port will share the same set of
    virtual hosts and web applications.</li>
<li>You might wish to use the IP filtering features of your operating
    system to restrict connections to port 8081 (in this example) to
    be allowed <strong>only</strong> from the server that is running
    Apache.</li>
<li>Alternatively, you can set up a series of web applications that are
    only available via proxying, as follows:
    <ul>
    <li>Configure another <code>&lt;Service&gt;<