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Date:      Mon, 8 Dec 1997 00:04:54 -0700
From:      Nate Williams <nate@mt.sri.com>
To:        tqbf@enteract.com
Cc:        molter@logic.it, freebsd-security@FreeBSD.ORG
Subject:   Re: [linux-security] New Program: Abacus Sentry - Port Scan Detector (fwd)
Message-ID:  <199712080704.AAA10395@mt.sri.com>
In-Reply-To: <19971207204013.7135.qmail@joshua.enteract.com>
References:  <Pine.BSF.3.96.971207155453.1425A-100000@dumbwinter.logic.it> <19971207204013.7135.qmail@joshua.enteract.com>

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> In muc.lists.freebsd.security, you wrote:
> >I though someone could be interested in this program, a port scanner
> >which seems more featureful than strobe (a port scanner in the
> >FreeBSD ports).
> 
> It's not a port scanner. It's a bad port-scan detector; it's designed to
> tell you when things like strobe (excellent program) are run against your
> host.

> It also doesn't work. In general, you need low-level network access
> (packet capture) to really detect port-scans....

You mean something like IPFW in 'paranoid' mode? *grin*

I've gotten probed a couple of times, and even on ports that have active
processes running on them.  IPFW is *great* for that sort of thing,
even if you aren't paranoid.  (But you should be nowadays...)




Nate



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