Edit...this is wrong-&gt; <i>It&#x27;s specific to Cisco ASA firewalls with a version level &lt; 9.1(7), which was released in January of 2015.</i><p>Edit: Gelob, below, is right.  There&#x27;s a really unfortunate &quot;read more&quot; link that hides the important bits on Cisco&#x27;s documentation and caused my confusion.