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Class C broadcast ??

In article <82r64r$v7e$1@newssvr04-int.news.prodigy.com>,
Steven <SCHEN@prodigy.net> wrote:
>I am challenged by some guy saying " Class C is broadcasting through
>internet even though you have a firewall".        That means as long as you
>use Class C IP, your LAN is exposed to Internet.         And that means your
>LAN is better not use any Class C IP, but your phony IPs internally.

That's right.  This feature was introduced into IP at the behest of
the NSA.  They figured that they could give secure class A and class B
network numbers to good ol' American networks, but them lousy foreigners
would only be issued with class Cs.  This allowed the NSA to see all
traffic on all foreign networks, without any effort.  In fact, they
could do it all from a simple dialup connection to AOL!

As the Internet grew, though, this admirable goal became harder to
realise.  A lot of people started to notice that there was unaccountable
broadcast traffic on their LAN, although most of them assumed it was
just down to Microsoft and Apple network protocols.  The NSA had to buy
a faster modem.

Eventually, it got completely out of hand.  As long ago as 1993, the NSA
realised that it would soon have to buy AOL outright to maintain its
monitoring capabilities.  They managed to wrangle some extra money from
the government by acquiring another `A' between its first and second
letters (funny how that Mars probe "just disappeared", wasn't it?),
and developed a new technology to monitor Internet traffic.  Needless
to say, I can't go into details here, but "Roundup Ready" isn't just a
genetically modified soya bean...

Anyway, with the soya-based monitoring system in place, the old Class
C system was no longer needed.  The IETF was permitted to redesign the
Internet numbering system; they called the new one CIDR.  Under this
scheme, Class C networks no longer even existed, and everyone was happy!
(Apart from the soya beans, that is.)

Tim.
--
Tim Goodwin   | "If you don't know what closures are, you probably don't
Leicester, UK | want to know what closures are." -- Larry Wall

Original headers:

From: tjg@star.le.ac.uk (Tim Goodwin)
Newsgroups: comp.security.unix
Subject: Re: Class C broadcast ??
Date: 14 Dec 1999 12:34:23 -0000
Message-ID: <835dh5$hqc$1@ltpcg.star.le.ac.uk>
References: <82r64r$v7e$1@newssvr04-int.news.prodigy.com>

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