What is MAC (Media Access Control) Address?
It is a sub layer of the OSI (Open Systems Interconnect) Data Link Layer protocol that gives the rules for resolving contention from multiple transmitters that transmit on a shared transmission medium.
Changing MAC Address in Linux
To change your MAC address in Linux do the following series of commands below.
shell# ifconfig ethN down
shell# ifconfig ethN hw ether new-mac-address
shell# ifconfig ethN up
where N is the interface number e.g eth0, eth1 …
Changing MAC Address in Windows XP/2k(x)
There are many ways to change your MAC Address in windows but i will not discuss it all here, instead i will just point you to the easiest way.
To change your MAC Address in windows simply download a MAC Address changer program which is widely available and free (at least some of them). You can download one from this url .
If you have problems before or after changing your MAC Address, I encourage you to post it here.
Warning: Changing MAC Address of your network interface card will cause network disconnection. It can also cause MAC Address conflict within your network so be very careful. you have been warned.