So I finally got time to go up to this business and play about...
Modem only mode gave my laptop:
Code:
IPv4 Address. . . . . . . . . . . : 80.235.149.51(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.240
Lease Obtained. . . . . . . . . . : 05 April 2015 20:46:52
Lease Expires . . . . . . . . . . : 12 April 2015 20:46:52
Default Gateway . . . . . . . . . : 80.235.149.49
DHCP Server . . . . . . . . . . . : 62.253.131.192
DNS Servers . . . . . . . . . . . : 194.168.4.123
194.168.8.123
The IP address isn't the static IP address the business is supposed to have..
I had no internet access and couldn't ping the default gateway - but did have ARP to it:
Code:
80.235.149.49 e0-2f-6d-6c-d8-da dynamic
Possibly I got dumped into the walled garden "autoregister" mode network?
PPPoE produced absolutely no response.
One thing I forgot to do was to try spoofing the MAC of the cable modem on my machine or ethernet router

I now wonder if that is all that needs to be done? Or go through the Autoregister stuff, if that is even still a thing?