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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?

Factor Mystic
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Yang
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3 Answers3

5

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).
RJFalconer
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  • 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? – Yang Jan 11 '10 at 04:23
  • 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. – RJFalconer Jan 11 '10 at 11:25
  • I found a couple references, through a quick google, that show that this will not work in every situation... – benc Jan 12 '10 at 08:52
  • 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. – Yang Aug 18 '10 at 18:12
  • I have updated my answer. Hope this helps! – RJFalconer Aug 19 '10 at 20:39
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http://devices.natetrue.com/macshift/ will succeed where others have failed. Though sometimes the MAC address is burned into the EEEPROM of the card.

Kelbizzle
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-3

Try a MAC address starting with 10, 12, 13, 14 or something like that.

Not all MAC addresses are supported in Windows 7.

slhck
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sss
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    "Not all MAC addresses are supported in Windows 7." - Please backup this statement otherwise I will assume its just a bunch of FUD. – Ramhound May 02 '12 at 11:31