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Date:      Thu, 12 Dec 1996 17:23:10 -0500 ()
From:      Bradley Dunn <bradley@dunn.org>
To:        Garrett Wollman <wollman@lcs.mit.edu>
Cc:        freebsd-security@freebsd.org
Subject:   Re: Risk of having bpf0? (was URGENT: Packet sniffer found on my system) 
Message-ID:  <Pine.WNT.3.95.961212171949.-3823323I-100000@swoosh.dunn.org>
In-Reply-To: <9612121458.AA24275@halloran-eldar.lcs.mit.edu>

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On Thu, 12 Dec 1996, Garrett Wollman wrote:

> Not if you run at security level 2, make all the files in /bin, /sbin,

You mean level 1, right? At level 2 it would be difficult to explain to
users why they can't upload their web pages. :-)

> /usr/bin, and /usr/sbin, and some of the files in /etc and / system
> immutable, and make all those directories plus / and /dev system
> append-only.  If you're running a public-access shell system, you most
> certainly should do just that.  (It's a big hassle for ordinary users,
> which is why we don't ship systems that way.)

-BD




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