quot; is received.
For receiving, this gives the benefit of only receiving packets from
the specified peer address/port.
</p>
</dd>
<dt>&lsquo;<samp>sources=<var>address</var>[,<var>address</var>]</samp>&rsquo;</dt>
<dd><p>Only receive packets sent from the specified addresses. In case of multicast,
also subscribe to multicast traffic coming from these addresses only.
</p>
</dd>
<dt>&lsquo;<samp>block=<var>address</var>[,<var>address</var>]</samp>&rsquo;</dt>
<dd><p>Ignore packets sent from the specified ad