From owner-freebsd-isp  Sat Oct 20 19:12: 2 2001
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Date: Sat, 20 Oct 2001 22:11:58 -0400 (EDT)
From: Jim Weeks <jim@siteplus.net>
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To: "Jonathan M. Slivko" <jslivko@4evermail.com>
Cc: freebsd-isp@FreeBSD.ORG
Subject: RE: arplookup failed:
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Thats entirely possible.  I think I did run trafshow which would do that,
but I am pretty sure the machine has been rebooted since doing
so.  Promiscuous mode wouldn't survive a hot boot would it?

--
Jim Weeks


On Sat, 20 Oct 2001, Jonathan M. Slivko wrote:

> Jim,
> 
> What you may have done is you may have set your NIC card into
> promiscuous mode, which tells the NIC card to intercept all packets on
> that network, not just the ones meant for that particular machine. What
> you may have seen could have been a result of that. -- Jonathan
> 
> ---------------------------------------------------
> Jonathan Slivko - 4EverMail.COM - www.4evermail.com
>    Web Hosting - Web Desgin - UNIX Shell Accounts
>    JSlivko@4evermail.com - Phone: (212) 663-1109
> 
> -----Original Message-----
> From: owner-freebsd-isp@FreeBSD.ORG
> [mailto:owner-freebsd-isp@FreeBSD.ORG] On Behalf Of Jim Weeks
> Sent: Saturday, October 20, 2001 9:53 PM
> To: freebsd-isp@freebsd.org
> Subject: arplookup failed:
> 
> Would someone please check me on this.  I know this has been discussed
> before and I want to make sure I understand correctly.
> 
> I am receiving the following error, 
> 
> Oct 20 21:16:21 server /kernel: arplookup XXX.XXX.XXX.XXX failed: host
> is
> not on local network
> 
> Indeed the server issuing the request is not on the same subnet.  If I
> understand arp correctly, the kernel is not able to respond to a mac
> address not directly connected to the subnet of the responding machine.
> 
> After looking at the results of "tcpdump -n -e -p arp", I see a lot of
> traffic from several subnets.  Should I be seeing arp requests other
> than
> those initiated by my default gateway or other machines on the same
> subnet?
> 
> Why would this machine be issuing request for interfaces connected to a
> different subnet, and if it should, why isn't it directing the requests
> to my default gateway?
> 
> Am I correct in assuming that this is a routing problem and not
> something
> I can correct from my end?
> 
> Thanks in advance,
> 
>  --
> Jim Weeks
> 
> 
> 
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