There are several that I have heard of. The <a href="http://pigtail.net/LRP/index.html">Linux Router Project</a> is small and can be run from a floppy, flash drive, or external Hard drive.<br>I have heard of <a href="http://www.smoothwall.org/get/">
Smoothwall</a> being run from a Flash Drive, and this <a href="http://community.smoothwall.org/forum/viewtopic.php?t=16604">link</a> may help.<br><br>I have personally used the Mandriva Flash v2008 and highly recommend it as a bootable Flash Distribution. It is a complete Desktopdistribution on a 4Gb Flash Drive, but it is not designed to be a firewall although it could be configured to do so using iptables and writing logs to a HD or external location.
<br><br>Finally, the <a href="http://www.yoggie.com/howItWorks.shtml">Yoggie Pico</a> is a complete Hardware Firewall in a Flash Drive type form factor.<br><br>Just some suggestions. Good luck.<br><br><br><div class="gmail_quote">
On Dec 31, 2007 10:22 PM,  &lt;<a href="mailto:unixprgrmr01@netscape.net">unixprgrmr01@netscape.net</a>&gt; wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d">Hans,<br><br></div><div><div class="Wj3C7c">&gt; What is the name of the stripped down Linux OS that you can boot from<br>&gt; a cd or USB thumb drive and use as a diskless firewall box?<br></div></div>
</blockquote></div><br><br clear="all"><br>-- <br>Donn<br>There is a very fine line between &quot;hobby&quot; and &quot;mental illness.&quot;<br>-- Dave Barry