Baffled by a Cable Modem

[Mikkel L. Ellertson]

Tom Horsley wrote:
> On Wed, 17 Jun 2009 14:07:49 -0700
> stan wrote:
> 
>> So it should look the same from both windows and linux
> 
> Wait! Are you dual booting windows and linux, or swapping the
> modem between two different computers? Vast numbers
> of cable companies register the MAC address of the interface
> they are first connected to and refuse to talk to other
> NIC cards without calling up the cable company and getting
> things reset.
> 
> That's one of the reasons that the MAC spoofing virtually
> all routers have is so useful. You can fool with your hardware
> without talking to the cable company.
> 
Even if they do not register the MAC address with the cable company,
the modem remembers it. You can reset it my powering down the modem,
waiting 10-30 seconds, and powering it back up.

I am not sure of the exact cause, but I have speculated that it has
a dhcp server with only one IP address in its address pool. It will
not give that IP address to another NIC until the lease expires, or
the server is restarted...

Mikkel
-- 

  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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