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Date:      Sat, 20 Feb 1999 23:36:54 -0500
From:      David Tichbourne <david@compusyssolutions.com>
To:        freebsd-net@FreeBSD.ORG
Subject:   ARP is not my friend.
Message-ID:  <36CF8D66.679F8509@compusyssolutions.com>

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hmmmm, Arp seems to be giving me a problem.
Can anybody provide some insight into my situation?

I am running a  ipfw/natd on my 2.2.8 kernel which
I compiled properly I think...everything seems to
work fine my firewall machine has 2 NICs and
I am able to route between the outside world and
my private IP network.

Every so often my firewall machine seems to
behave like an arp proxy, which I don't want.
On my firewall console I get messages
like:


..... /kernel: arp: 192.168.0.1 moved from 08:00:07:a6:f7:74 to
00:00:b4:87:00:98

later things seem to "reset" back to

..... /kernel: arp: 192.168.0.1 moved from 00:00:b4:87:00:98 to
08:00:07:a6:f7:74

this also happens to my second machine 192.168.0.3 machine as well
(different ethernet addresses of course)

192.168.0.1 and 0.3 are behind my firewall and when arp reconfigures
their ethernet addresses
they obviously can see the outside world through the firewall.

Any insight would be greatly appreciated.  I thought about recompiling
my kernel again
but I looked and can't seem to see any options that could have caused
this mini hell of mine to form.

Thanks.

Dave.



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