Home page logo

nanog logo nanog mailing list archives

Re: Reporting Little Blue Men
From: Eric Wieling <eric () ccti net>
Date: Wed, 21 Jan 1998 15:34:28 -0600

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 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.

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]