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Date:      Mon, 8 Apr 2002 17:45:59 -0700 (PDT)
From:      Jason Stone <jason@shalott.net>
To:        Michael Sharp <ms@probsd.ws>
Cc:        <freebsd-security@FreeBSD.ORG>
Subject:   Re: Berkley Packet Filter
Message-ID:  <20020408172043.E32064-100000@walter>
In-Reply-To: <20020408202441.W3388-100000@phoenix.vh.laserfence.net>

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> In short summary, I would say:
>
>  For a security administrator's work station, turn it on.
>  For anything else, turn it off.

Why turn it off?  Does anyone still worry about sniffing?  Given the
prevalence of ssh and ssl-aware clients these days, if there's any
plaintext still going over your network, your time would be better spent
fixing that.

And bpf is invaluable for debugging network-related problems.  Whenever
some network-related service stops working right, the very first thing I
do is to run tcpdump to see what's going on.

Bottom line - if there's anything an attacker could gain by sniffing your
network, you already have problems.  Yeah, yeah, security in layers, but
there's really no excuse to still be allowing plaintext protocols at this
stage of the game.


 -Jason

 -----------------------------------------------------------------------
 I worry about my child and the Internet all the time, even though she's
 too young to have logged on yet.  Here's what I worry about.  I worry
 that 10 or 15 years from now, she will come to me and say "Daddy, where
 were you when they took freedom of the press away from the Internet?"
	-- Mike Godwin

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