Date: Thu, 5 Nov 1998 04:24:00 -0500 (EST) From: Open Systems Networking <opsys@mail.webspan.net> To: freebsd-security@FreeBSD.ORG Subject: Amazing wonder packet Part 2. Message-ID: <Pine.BSF.4.02.9811050419420.26130-100000@orion.webspan.net> In-Reply-To: <19981104112352.B4776@mcs.net>
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Ok someone sent me this so I thought I would run it by the list i'll quote
the message here:
"seeing how /etc/rc.firewall is a shell script, it is reasonable to assume
that most ruleset will include small raceable sections where some packets
that should be denied will not be. I kludged as bellow:
put a '$fwcmd add 1 deny all from any to any' as the first rule and moved
the flush command to one line above it.
put a '$fwcmd delete 1' right after my 65534 deny all.
This should cut the available time for races down substantially. I've seen
packets hit the temporary rule but have never seen a magic packet that
made it too the last."
What do you guys think about this as a possible solution/hack.
Short of tearing up ipfw which I don't have the time to do can anyone see
this having more negative actions rather than positive ones?
Im not really sure what else one could do.
Chris
--
"You both seem to be ignoring the fact that the networking market is
driven by so-called 'IT professionals' these days, most of whom can't
tell the difference between an ARP and a carp." --Wes Peters
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