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MAC addresses are useful for identifying devices on a network. For home users, you might use MAC filtering to restrict acces to you Wi-Fi network.  A MAC address works better for these administrative tasks because, unlike IP addresses, the MAC address doesn’t change.

MAC spoofing can be used maliciously to circumvent network controls, but it’s really only effective for blacklists—that is, if someone specifically blocked your device from the network. For whitelists, you’d have to know the MAC address of a specific device you’re trying to spoof.

Changing your MAC address has legitimate uses as well. You can use it to test your own MAC filtering settings. Or you can use it to assign specific rules to a set of devices within a certain MAC address range.

• Press Windows key + X on your keyboard, then click Device Manager. Expand Network adapters, right-click your Ethernet or Wireless adapter, then click Properties.

• Select the Advanced tab. Within the Property box, scroll down, select Locally Administered Address, and select the Value radio box; there, you will see your adapters MAC address. Click in the Value box, clear its contents, and enter a new address to edit the address. A Mac address consists of six pairs of hexadecimal digits. Enter a new set without the hyphens, click OK, then restart your computer.

• To confirm the change, open Start, type: CMD, right-click CMD, then click Run as administrator. At the command prompt, type: ipconfig/all, then hit Enter to check the physical address.

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