I finally got the firewall from Condo Conner moved to the Facility in the
Middle of Nowhere, and just as I had
our cable connection wasn't passing traffic to it since the
network card in the firewall had a different MAC address.
I know that it is possible to change the MAC address on a NIC but not having done it before I
had to do some research. I found out that under Unix, it's easily done with
ifconfig interface hw ether MAC address
Spring and I had to
leave to meet some friends, but I gave the information to Rob for him to
play around with it. The idea was to change the MAC address on the firewall
interface to match the NIC in Rob's machine, and then change the MAC address
on Rob's machine, or swap out the NIC.
Upon returning home, Rob had some success with it. He was able to set the
MAC address on the firewall to match his computer and get traffic through,
but with a 60% packet loss. Looking into the problem it turned out to be
that the cable modem was set for 100Base-T while the NIC in the firewall
is a 10Base-T interface. The fix for that was to power cycle the cable modem and
allow it to sync at 10Mbs instead of 100Mbs.
But Rob didn't want to play around with changing MAC addresses—he wanted
to get the cable modem to use the firewall's MAC address. He had attempted
to call the cable provider but the technician he got did not understand what
Rob wanted. We'll be using his box for the gateway for the time being.
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