If you want to use your modem on their network it must be manged by them which includes firmware and configs, every DOCSIS cable modem is like that every DOCSIS providers is like that, if you dont like that use one of theirs or dont subscribe to them, is really your only two options.
As for the APR If you block APR you would have no net access, its that simple, APR is used to find the MAC address associated with an IP address in the same subnet, If you blocked it your router would not know how to contact the gateway as well as anyone else in your subnet.
As for the light blinking
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shaw modem "activity" light going nuts???»
Shaw FAQ's »
My modem is flashing/not flashing, what does this mean?I believe it can be controlled by changes to the config file or in the firmware but I highly doubt you get this changed yourself
To add:
said by alternety:Yes I did reset the modem. I selected reset to factory defaults and rebooted. Worked fine but did not change the ARPs from being passed through to the LAN port. The light continues to blink.
The factory defaults are overwritten by the config once it logs on to the network which put it in the same sate it was already in, so basically it dose nothing at least in the way your trying to use it.