Windows and Linux Spoof MAC Address

Linux
    ifconfig eth0 hw ether 00:11:22:33:44:55

Windows 

Registry
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0008]

"NetworkAddress"="001122334455"
or GUI
Start/Settings/Network Connections/Local Area Connection
Properties/Configure ...

Advanced




Advanced (Another example)