LINUX revert to real MAC address

[spence]

Hello,
I know that I can spoof a MAC address fairly easily in Linux using

ifconfig <interface> down hw ether <new MAC>

But what if I want to revert to the real MAC and I do not know what the real one was.
Short of opening the box and trying to look for the MAC on sticker or something, how can you revert to the original MAC?
Thanks,
spence

[Max232]

As the root user (or user with appropriate permissions)
Type "ifconfig -a"
From the displayed information, find eth0 (this is the default first Ethernet adapter)
Locate the number next to the HWaddr. This is your MAC address
The MAC Address will be displayed in the form of 00C7:1B:8C:02.
Example "ifconfig -a" output:
eth0 Link encap:Ethernet HWaddr 00C7:1B:8C:02
inet addr:192.168.111.20 Bcast:192.168.111.255 Mask:255.255.255.0

[spence]

Thanks for the reply Max232, but I think that just shows me the current MAC address. i.e. The spoofed one.
I was after a way to display or revert to the original mac that the nic comes out of the factory with.

[jonc]

disable the script and no more spoof... back to original or look in dmesg after you boot to see the original.

[spence]

disable the script and no more spoof... back to original or look in dmesg after you boot to see the original.

Thanks jonc,
I found that it was not kept after reboot. So you are correct.
Entering the commands above sets the MAC, then reboot and the MAC reverts to normal.
Thanks for the dmesg hint though.