or port separated with a
    semicolon (";") to allow different expressions for each connector.</p>

    <p>The behavior when a request is refused can be changed
    to not deny but instead set an invalid <code>authentication</code>
    header. This is useful in combination with the context attribute
    <code>preemptiveAuthentication="true"</code>.</p>

    <p><strong>Note:</strong> There is a caveat when using this valve with
    IPv6 addresses. Format of the IP address that this valve is processing
    d