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Date:      Mon, 23 Mar 2009 15:22:09 -0400
From:      "Jean-Paul Natola" <jnatola@familycareintl.org>
To:        "freebsd-questions@freebsd.org" <FreeBSD-Questions@FreeBSD.org>, "John Almberg" <jalmberg@identry.com>
Subject:   RE: utility that scans lan for client?
Message-ID:  <3A85D7EF44E1C744BF6434691F5659E9015E4225@www.fcimail.org>
In-Reply-To: <20090323191917.GA46373@Grumpy.DynDNS.org>
References:  <E4A3989A-982F-4B9D-971D-25C49A932EB7@identry.com> <20090323191917.GA46373@Grumpy.DynDNS.org>

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http://www.softperfect.com/products/networkscanner/



-----Original Message-----
From: owner-freebsd-questions@freebsd.org
[mailto:owner-freebsd-questions@freebsd.org] On Behalf Of David Kelly
Sent: Monday, March 23, 2009 3:19 PM
To: John Almberg
Cc: freebsd-questions@freebsd.org
Subject: Re: utility that scans lan for client?

On Mon, Mar 23, 2009 at 02:59:36PM -0400, John Almberg wrote:
> I've tried googling for this, but I guess I don't know the name of a =20
> utility such as this...
>=20
> What I'm looking for is a utility that can scan a LAN for attached =20
> clients... i.e., computers that are attached to the LAN.
>=20
> I have one box (an appliance that I have no access to), that is on =20
> the LAN but I don't know what IP address it's using. I'd like to =20
> complete my network map, and that is the one empty box on my chart.

How about something as simple as "arp -a"? This lists the arp cache of
machines recently heard by your machine. If you know the IP address of
the machine in question and its not in your arp table, ping it. Then the
MAC address will appear unless there is a router between here and there.

No need to be root.

--=20
David Kelly N4HHE, dkelly@HiWAAY.net
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Whom computers would destroy, they must first drive mad.
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