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Date:      Mon, 22 Feb 1999 18:11:33 -0300 (EST)
From:      Joao Carlos Mendes Luis <jonny@jonny.eng.br>
To:        david@compusyssolutions.com (David Tichbourne)
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: ARP is not my friend.
Message-ID:  <199902222111.SAA02350@roma.coe.ufrj.br>
In-Reply-To: <36CF8D66.679F8509@compusyssolutions.com> from David Tichbourne at "Feb 20, 1999 11:36:54 pm"

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#define quoting(David Tichbourne)
// Every so often my firewall machine seems to
// behave like an arp proxy, which I don't want.

arp proxy ?

// 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

You probably have another machine on the same IP.  Double check every
machine.  Do you have an ether address list of every machine ?

// 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.

Why ?  Does your firewall filter by mac address ???

					Jonny

--
Joao Carlos Mendes Luis            M.Sc. Student
jonny@jonny.eng.br                 Universidade Federal do Rio de Janeiro
"This .sig is not meant to be politically correct."


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