Date: Mon, 19 Nov 2001 03:38:19 -0600 From: Alfred Perlstein <bright@mu.org> To: Anjali Kulkarni <anjali@indranetworks.com> Cc: freebsd-hackers@freebsd.org Subject: Re: tcpdump Message-ID: <20011119033819.N13393@elvis.mu.org> In-Reply-To: <001701c170dd$71b11ac0$0a00a8c0@indranet>; from anjali@indranetworks.com on Mon, Nov 19, 2001 at 03:04:11PM %2B0530 References: <001701c170dd$71b11ac0$0a00a8c0@indranet>
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* Anjali Kulkarni <anjali@indranetworks.com> [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
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