From owner-freebsd-questions@FreeBSD.ORG Mon Mar 23 19:19:19 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C30171065675 for ; Mon, 23 Mar 2009 19:19:19 +0000 (UTC) (envelope-from dkelly@Grumpy.DynDNS.org) Received: from smtp.knology.net (smtp.knology.net [24.214.63.101]) by mx1.freebsd.org (Postfix) with ESMTP id 511E78FC27 for ; Mon, 23 Mar 2009 19:19:18 +0000 (UTC) (envelope-from dkelly@Grumpy.DynDNS.org) Received: (qmail 3850 invoked by uid 0); 23 Mar 2009 19:19:17 -0000 Received: from unknown (HELO Grumpy.DynDNS.org) (75.76.211.79) by smtp5.knology.net with SMTP; 23 Mar 2009 19:19:17 -0000 Received: by Grumpy.DynDNS.org (Postfix, from userid 928) id 8965328429; Mon, 23 Mar 2009 14:19:17 -0500 (CDT) Date: Mon, 23 Mar 2009 14:19:17 -0500 From: David Kelly To: John Almberg Message-ID: <20090323191917.GA46373@Grumpy.DynDNS.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i Cc: freebsd-questions@freebsd.org Subject: Re: utility that scans lan for client? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: FreeBSD-Questions@FreeBSD.org List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Mar 2009 19:19:20 -0000 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 > utility such as this... > > What I'm looking for is a utility that can scan a LAN for attached > clients... i.e., computers that are attached to the LAN. > > I have one box (an appliance that I have no access to), that is on > the LAN but I don't know what IP address it's using. I'd like to > 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. -- David Kelly N4HHE, dkelly@HiWAAY.net ======================================================================== Whom computers would destroy, they must first drive mad.