Can I spoof Mac Address?

[ruckoff124]

Hardware: Dell Latitude laptop with Windows XP Home.

I have had no problem finding programs to spoof the MAC address of my
laptop's wireless card (802.11 pcmcia card), but I'm not having so much
luck with my dialup modems. Is it possible to spoof the MAC address
for the internal modem (called Lucent Win Modem) or a US Robotics 56K
fax modem connected through the laptop serial port?

I have tried MacShift and MacAddress Changer with no luck regarding the
2 modems mentioned.

Thanks for any help that can be provided!

 

[David H. Lipman]

From: <[email protected]>

| Hardware: Dell Latitude laptop with Windows XP Home.
|
| I have had no problem finding programs to spoof the MAC address of my
| laptop's wireless card (802.11 pcmcia card), but I'm not having so much
| luck with my dialup modems. Is it possible to spoof the MAC address
| for the internal modem (called Lucent Win Modem) or a US Robotics 56K
| fax modem connected through the laptop serial port?
|
| I have tried MacShift and MacAddress Changer with no luck regarding the
| 2 modems mentioned.
|
| Thanks for any help that can be provided!

Most NICs have the capability to over-ride the MAC address with another.

Look at the hardware device settings.

 

[Gray]

Each MAC address is burned at the factory. Each one is UNIQUE in the world.
There should never be two NIC's with the same MAC address anywhere.

So why are you trying to change it?

 

[q_q_anonymous]

Each MAC address is burned at the factory. Each one is UNIQUE in the world.
There should never be two NIC's with the same MAC address anywhere.

in theory it's unique.
But in practice is this the case? Considering that it doesn't matter
if they're not all unique. They need only be unique if they're all
connected to the same switch - (or hub or each other) .

Also,

It's 6 bytes. Each NIC making organisation is given 3 bytes which are
fixed, leaving 3 bytes variable(so, 24 variable bits). 2^24= about 16
million. Maybe some of these big NIC making organisations make more
than 16 million cards.

MAC addresses have a UAA(BIA) and a LAA(which you can set). If you
set the LAA it uses that instead of the BIA. The BIA isn't changed
though. But the MAC adress that is used, is changed.
http://www.mynetwatchman.com/pckidiot/chap04.htm
also, answers.com

And as that mynetwatchman site indicates. The set of possible LAAs
(you can choose any of them) doesn't conflict with the set of possible
UAAs.
So there can be conflict by definition! e,g, 2 people using the same
LAA. But it's only a problem if the comps are directly connected to
the same switch - (or hub or each other - 'cos NICs test the MAC and if