spoofing MAC addresses

You can even change (or "spoof") the hardware MAC address for your network device. This is usually only necessary to get around some ISPs' attempts to link Internet service to a specific machine. Be careful with spoofing your MAC address because a mistake can conflict with other network devices, causing problems. If you do decide to spoof your MAC, make sure you use ifconfig by itself to first acquire the default MAC address so you can roll back to that later (by the way, the MAC address shown in this command is completely bogus, so don't try to use it).

# ifconfig eth0 hw ether 00:14:CC:00:1A:00