assphrase.
</DL>

<P>

<B>-a </B><B></B><I>id</I>, <B>--action </B><B></B><I>id</I> (Set desired action)
<DL COMPACT><DT><DD>
This option specifies the desired action to be executed by the server upon successful authentication. It must be one of &quot;open&quot;, &quot;close&quot; or &quot;forward&quot;. Note that port forwarding requires two ports to be specified.
</DL>

<A NAME="lbAH">&nbsp;</A>
<H2>PORT KNOCKING</H2>

<P>

<P>

<B>-K </B><B></B><I>address</I>, <B>--knock-ip </B><B></B><I>address</I> (Set