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MAC Address

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Join Date: Jul 2004

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ydpraveen

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MAC Address

Jul 4th, 2004

Can we Change the MAC Address of an Ethernet Card in Linux 9

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kc0arf

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Posting Virtuoso

Re: MAC Address

Jul 5th, 2004

Hello,

You MIGHT be able to, but why would you want to?

Which Linux version? Mandrake? RedHat?

Christian

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Zachery

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The Geek Father

Re: MAC Address

Jul 5th, 2004

sounds like someone is trying to avoid a ban for a gaming server.

99% of the time, its not possible on newer cards.

Firefox: no, its not the end all solution, it has its own issues and in time it will be just as insecure as IE, when its hit Firefox 6, if it makes it that far. Oh, and AOL pays for it, incase you didn't know.

Microsoft & Windows: If you hate it so much, move to linux, or bsd, or anything else, stop complaning and move on.
Good starting places: Gentoo Novell SUSE Fedora Core Apple

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Join Date: Jan 2004

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TKS

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Re: MAC Address

Jul 10th, 2004

You can change the MAC address with something like the following command:

ifconfig eth0 hw ether AA:FF:EE:00:00:00

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TKS

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Re: MAC Address

Jul 10th, 2004

Hey, why am I the only one who answered who isn't a supermod

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DMR

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Re: MAC Address

Jul 12th, 2004

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Originally Posted by TKS

Hey, why am I the only one who answered who isn't a supermod

Only because you posted before I did... :mrgreen:

"ifconfig eth0 hw ether AA:FF:EE:00:00:00"

Yes, that might very well work. The interface will probably have to be taken offline in order for that to work though, so before you try the above command, do the following:

ifdown eth0

Remember that the example "eth0" refers to your first or only Ethernet NIC; if you have 2 NICs and it's the address of the second that you want to change, it would be eth1 instead of eth0.

Also, a change implemented by the above command may not persist through a reboot; you have to take extra steps to make the new MAC "permanent". See the following for a bit more info:
http://whoozoo.co.uk/mac-spoof-linux.htm

There are also utilities specific to the individual chipset used on a given NIC which can change the MAC as well. Regardless of how you try to make the change, the chipset and driver must support this ability,

*Note that ISPs often use your MAC address as part of the information which authenticates you as a valid customer. Depending on your network/Internet configuration, changing your MAC addy might break your connection to your ISP.

"May the Wombat of Happiness snuffle through your underbrush."
- Ancient Aborigine blessing

Please do not contact me by email or PM for help. We're all volunteers here, and only have so much free time to dedicate to our efforts.

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kc0arf

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Posting Virtuoso

Re: MAC Address

Jul 12th, 2004

Hi,

Wouldn't the MAC address on the Cable Modem / DSL device be the one tracked by the ISP? I know that on my systems here, there are various hops to get to the network. The ISP wouldn't care what NIC is in my Redhat box... they see the MAC on the cablemodem device.

Of course, the linux commands are not going to change the Cable Modem's information.

I have also thought of a reason why I would want to change a MAC address... so that I could have a wireless device filter for that MAC address.

Oh well.

Christian

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DMR

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Re: MAC Address

Jul 12th, 2004

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Originally Posted by kc0arf

Hi,

Wouldn't the MAC address on the Cable Modem / DSL device be the one tracked by the ISP? I know that on my systems here, there are various hops to get to the network. The ISP wouldn't care what NIC is in my Redhat box... they see the MAC on the cablemodem device.

Depending on your particular setup (and your ISP), the cable modem will acquire the MAC addy of the attached device and pass that on to the ISP. That's the reason many broadband gateway routers have a "spoof this computer's MAC address" (or similar) option.