From owner-freebsd-hackers Mon Nov 19 1:38:21 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from elvis.mu.org (elvis.mu.org [216.33.66.196]) by hub.freebsd.org (Postfix) with ESMTP id 30BCD37B41A for ; Mon, 19 Nov 2001 01:38:19 -0800 (PST) Received: by elvis.mu.org (Postfix, from userid 1192) id 11E0781D0A; Mon, 19 Nov 2001 03:38:19 -0600 (CST) Date: Mon, 19 Nov 2001 03:38:19 -0600 From: Alfred Perlstein To: Anjali Kulkarni Cc: freebsd-hackers@freebsd.org Subject: Re: tcpdump Message-ID: <20011119033819.N13393@elvis.mu.org> References: <001701c170dd$71b11ac0$0a00a8c0@indranet> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <001701c170dd$71b11ac0$0a00a8c0@indranet>; from anjali@indranetworks.com on Mon, Nov 19, 2001 at 03:04:11PM +0530 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG * Anjali Kulkarni [011119 03:36] wrote: > Hi, > > I am trying to make tcpdump work across 2 machines, ie trying to > monitor a machine's IP packets from another machine. Just typing > 'tcpdump host ip2' from the first m/c, say ip1, is not working. > However, typing 'tcpdump host ip2' on ip2 works fine. Do I have to > configure BSD packet filter to make this work ? I am working on > 4.3. Please wrap lines at 70 characters. You're probably on a switch which means that other hosts on the same ethernet segment can not see each other's packets. You need a hub or a switch that supports a monitoring port where all packets are repeated. -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' http://www.morons.org/rants/gpl-harmful.php3 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message