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RE: Reporting Little Blue Men
From: Dave Van Allen <dave () fast net>
Date: Wed, 21 Jan 1998 22:36:26 -0500

That would make you one of the (few) Good Guys!

Dave Van Allen


-----Original Message-----
From: Eric Wieling [mailto:eric () ccti net]
Sent: Wednesday, January 21, 1998 4:34 PM
To: nanog () merit edu
Subject: Re: Reporting Little Blue Men


On Tue, Jan 20, 1998 at 07:50:16PM -0500, Dave Van Allen wrote:
Start by making sure your RAS users and direct customers (your
network's
edge) can only output packets that contain their valid source address.
If everyone did this, all of the world's problems would go away; Ozone
depletion, world hunger, that silly rain forest thing, Smurfs and DoS
and maybe even Microsoft! :-)

We prevent ANY packets to or from our network with a broadcast
address.  We don't filter on a per-machine basis for address
spoofing, but ALL packets leaving our network must have a valid
address on our network.  Basically, one user on our network can spoof
another user on our network, but no users can spoof addresses that
are not on our network.

--Eric
-- 
Eric Wieling (eric () ccti net), Chesapeake Communications Corporation
Sales: sales () ccti net 504-585-1850, Support: support () ccti net
504-535-5449

We have changed our name!  Corporate Communications Technology is now
known as Chesapeake Communications Corporation.


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