I found useful information at http://www.homenethelp.com
<http://www.homenethelp.com>

Anyone with a cable modem or dsl should consider installing a software or
hardware firewall.  I was surprised to find log entries for "the ping of
death" - Was this the explanation for unexpected lockups?

You can run security tests at www.dslreports.com <www.dslreports.com>  or
try the Shields up test at www.grc.com <www.grc.com>