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Thread: Changing a MAC address?




  1. #1
    Join Date
    Nov 2001
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    how do you change a MAC address of a NIC in windows?
    --Ray Wells--
    Lead Administrator / Organiser: TUGG - The Ultimate Gaming Group
    TUGG Website

  2. #2
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    as far as I'm aware - u can't - its the whole point of MAC addresses - they are unique to each nic/network aware device

  3. #3
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    Nov 2001
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    yeah...
    i thought the same thing but i have heard that it possible to change them only i am not quite sure how!
    --Ray Wells--
    Lead Administrator / Organiser: TUGG - The Ultimate Gaming Group
    TUGG Website

  4. #4
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    The MAC addresses are hardcoded into the firmware of the NIC. I have heard of them being able to be changed by the manufacturer using a firmware update. Why would you need to change the MAC address of a NIC?

  5. #5
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    mmm...fair enough!

    i have no real reason for wanting to change it i was just curious as to whether or not it could actually be done :D
    --Ray Wells--
    Lead Administrator / Organiser: TUGG - The Ultimate Gaming Group
    TUGG Website

  6. #6
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    well normally you change the MAC address only when there is a conflict on your existing LAN but I did it on my linux router for free cable modem access for a while. it no longer works because the bootleg cable modem i bought which passes the MAC address from whatever NIC it connects to instead of using the one on the cable modem. SO since my internal NIC was a Linux firewall I just changed the MAC address on the card to something that would authenticate with the cable company. it took like 75 attempts before i found one that worked..

    I have a white paper in PDF format from L0pht way back in the day here which might help..

    too big to attach to this message but if you want email me and I'll pass it on..

  7. #7

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    go to regedit.com they tell u how... a few regedits andya done
    sKuLLsHoT
    www.morb.ath.cx

  8. #8
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    Nov 2001
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    The MAC address is actually part of the NIC tho. Anything in the registry would be just for the OS. The only way to change the MAC address is to get a new NIC.

    I do cable internet support and I get people who have gotten new NICs and can't get online. So I have to update their profile. Because the service is bound to their NIC.

  9. #9
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    Nov 2001
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    skullshot, i have just visited regedit.com...that is a cool web site! :D
    --Ray Wells--
    Lead Administrator / Organiser: TUGG - The Ultimate Gaming Group
    TUGG Website

  10. #10
    Join Date
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    On SUN boxes you can change the MAC with ifconfig or via the PROM-Monitor. YOu can also change the MAC address on a NIC in many of the other Unix flavors. I used to have a DOS program which would run via the config.sys file and basically LIE about what the MAC address on the NIC was.

    You can also do some real hardware modding and literally reprogram the serial EPROM chip.

    At last i finally found the URL of the whitepaper on MAC cloning.

    http://www.atstake.com/research/repo...ss_cloning.pdf

    its interesting reading trust me..

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