MAC address spoofing not working in Windows

Question

In Windows 7 I tried setting my MAC address by changing it via adapter properties (Locally Administered MAC Address), but ipconfig /all still shows the old address, even after rebooting. Any hints?

Solution 1

It's possible your card does not support changing your mac address.

You may also have more luck with a mac address changing utility.

Edit: It seems things are slightly different on Windows 7

(Taken from a forum post);

1. Go to Control Panel->Device Manage->Network Adapter->Advanced->Network Address
2. Change the value here. Ensure the first two digits are not the same.
3. Change the registry key value. (Guide here).

Solution 2

http://devices.natetrue.com/macshift/ will succeed where others have failed. Though sometimes the MAC address is burned into the EEEPROM of the card.

Comments

[Yang]

Are you sure that this is something that the network card would need to support? Unless you have a network accelerator card, aren't Ethernet headers are generated in-kernel?

[RJFalconer]

Interesting thought. I think after the driver calls NdisReadNetworkAddress() it can decide whether or not to accept the user-provided address before saving it in hardware registers. The burned-in one can definitely never be changed, but I was under the impression it was optional for a device to accept user-defined mac addresses.

[Yang]

I know my laptop can forge the MAC address - I was able to do this in XP, but not in 7. Been a while since I tried this, so I'm marking this accepted, though I never found a resolution to my problem.

[RJFalconer]

I have updated my answer. Hope this helps!

[Ramhound]

"Not all MAC addresses are supported in Windows 7." - Please backup this statement otherwise I will assume its just a bunch of FUD.

[Unknown123]

@LawrenceC Yang Kelbizzle the download link is dead, please, would you like to reupload it here?