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Date:      Wed, 19 Sep 2001 16:51:27 -0400 (EDT)
From:      Kenneth Wayne Culver <culverk@wam.umd.edu>
To:        "Matthew T. Lager" <mlager@lynxcom.net>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: NATD Problem...
Message-ID:  <Pine.GSO.4.21.0109191650580.5353-100000@rac1.wam.umd.edu>
In-Reply-To: <Pine.GSO.4.33.0109191051550.2245-100000@srvr1.lynxcom.net>

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You probably have both interfaces hooked to the same hub or switch

Ken

On Wed, 19 Sep 2001, Matthew T. Lager wrote:

> I just installed a fresh version of FreeBSD 4.4RC5 on an Intel machine. I
> configured NATD. The setup is as follows:
> 
> KERNEL:
> options         IPFIREWALL
> options         IPDIVERT
> 
> /etc/rc.conf:
> gateway_enable="YES"
> firewall_enable="YES"
> firewall_type="OPEN"
> natd_enable="YES"
> natd_interface="xl0"
> natd_flags=""
> 
> ifconfig -a:
> xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         inet6 fe80::250:4ff:fe6c:daa7%xl0 prefixlen 64 scopeid 0x1
>         inet 204.210.40.137 netmask 0xffffff00 broadcast 255.255.255.255
>         ether 00:50:04:6c:da:a7
>         media: Ethernet 10baseT/UTP (10baseT/UTP <half-duplex>)
> 
> ep0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
>         inet6 fe80::220:afff:fe12:a929%ep0 prefixlen 64 scopeid 0x2
>         ether 00:20:af:12:a9:29
>         media: Ethernet 10baseT/UTP
> 
> The true internet IP address is on xl0 and the LAN IP address is on ep0.
> NATD functions fine, but I receive hundreds and hundreds of error messages
> in my logfile:
> 
> Sep 19 06:48:46 firewall /kernel: arp: 192.168.0.101 is on ep0 but got
> reply from 00:01:03:e6:a4:d5 on xl0
> Sep 19 06:48:47 firewall /kernel: arp: 204.210.40.1 is on xl0 but got
> reply from 08:00:3e:07:07:ab on ep0
> Sep 19 06:49:18 firewall last message repeated 20 times
> Sep 19 06:51:19 firewall last message repeated 63 times
> Sep 19 07:01:20 firewall last message repeated 290 times
> Sep 19 01:57:56 firewall /kernel: arp: 192.168.0.100 is on ep0 but got
> reply from 00:02:e3:08:49:d8 on xl0
> 
> and so on. What the heck is wrong? Thanks!
> 
> Matt Lager
> mlager@lynxcom.net
> 
> 
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