Arplookup error.

[Sorin Chiorean]

Hi,
I installed a new FreeBSD 4.9 box and is running as a Firewall/NAT device
for a small network.
I am getting this error twice per day :
"/kernel: arplookup 100.93.140.1 failed: host is not on local network"
Everything works ok without any problems for all our workstations behind
this Firewall/NAT machine. They can browse the Internet, receive emails ,
etc.. 
Can anybody tell me how to get ride of this message ?

Sorin Chiorean
Network Specialist
Computer Partners


The setting are the following :

To connect to INTERNET I have a radio-modem with a static IP. 
Lets say that I have this setting from my ISP:
DNS 100.93.140.1
IP 102.157.188.141
MASK 255.255.255.224
GW 102.157.188.129 
This IP's are not real. I changed the first two numbers.
I use IPFILTER and IPNAT with the following settings:
ipfilter.conf:
pass in all
pass out all
and ipnat.conf:
map xl0 192.168.1.0/24 -> 0.0.0.0/32 portmap tcp/udp 40000:60000
map xl0 192.168.1.0/24 -> 0.0.0.0/32

If I enter "ifconfig -a" I will get : 
xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=3<rxcsum,txcsum>
        inet 102.157.188.141 netmask 0xffffffe0 broadcast 102.157.188.159
        inet6 fe80::250:daff:fece:8d34%xl0 prefixlen 64 scopeid 0x1
        ether 00:50:da:ce:8d:34
        media: Ethernet autoselect (10baseT/UTP)
        status: active
xl1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        options=3<rxcsum,txcsum>
        inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255
        inet6 fe80::210:5aff:fe5d:ee1a%xl1 prefixlen 64 scopeid 0x2
        ether 00:10:5a:5d:ee:1a
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
        inet 127.0.0.1 netmask 0xff000000