[57171] in North American Network Operators' Group
RE: State Super-DMCA Too True
daemon@ATHENA.MIT.EDU (E.B. Dreger)
Sun Mar 30 17:11:13 2003
Date: Sun, 30 Mar 2003 22:10:45 +0000 (GMT)
From: "E.B. Dreger" <eddy+public+spam@noc.everquick.net>
To: nanog@merit.edu
In-Reply-To: <390E55B947E7C848898AEBB9E5077060750B45@msmdcfs01.msmgmt.com>
Errors-To: owner-nanog-outgoing@merit.edu
JM> Date: Sun, 30 Mar 2003 10:34:28 -0500
JM> From: "McBurnett, Jim"
JM> NAT-- HMMM - In my eyes that is a security precaution for the
JM> ignorant.. Think of this: Joe user goes to Wally World, or
JM> Staples and get's a Linksys BEFSR11 cable/dsl router. He adds
JM> NAT, and walla, his computer is no longer wide open to the
JM> world... Albeit not a stateful firewall, it is much more
Actually, it _is_ stateful. It tracks state so it knows what
inbound traffic is directed to what IP:port on the inside, or
dropped if no match is found.
Run 1:1 NAT and see how secure that is. Run a "public" IP
address with stateful rules that drop inbound traffic unless
outbound traffic happened "recently". Compare.
NAT's "security" is a by-product of state that is necessary to
achieve 1:N mapping.
Eddy
--
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