 |
| Open CMD, type ipconfig /all to ceck MAC Address/Physical Address |
Method #1:
1. Click Start > Control Panel.
2. Double click Network Connections, will open network interfaces settings windows.
3. Right click interface you want to change, select properties.
4. On General tab, click Configure.
5. Select Advance tab, then on scroll the select box, select Locally Administered MAC Address. Enter new MAC value, Maximum 12 characters number and letter A to F, see example below.
6. Click OK to save new setting, restart your PC to take effect.
 |
| Change MAC Address via network interface properties |
Notice: Please backup your registry before do step below. I assume you familiar with Windows registry system and able to recovery if something went wrong.
1. From Start, select Run, type registry, then OK
2.Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}, your network interface will have be in key: 0000 , 0001, 0002 and so on. check for each key for NetCfgInstanceID that match inface GUID and DriverDesc that match your hardware manufacturer.
3. Create new string key, click Edit > New > String Value.
4. Name it NetworkAddress, type value 12 characters example 0A0A0A0AFFFF (only numbers and letter A to F allowed)
5. Save registry, restart you PC to take effect.
 | ||||
| -To check interface GUID, on DOS command prompt type: net config rdr -Example above show my GUIDs NetBT_Tcpip_{776FB051-84A4-486F-AEE8-27EE7740CAE1} (0A0A0A0AC5FF) NetBT_Tcpip_{725A4E6E-CC28-4072-84D5-191C3F5BC362} (08002700D857) |
 |
| After change, registry value now 0A0A0A0AC5FF |
Method #3
The easiest way to change MAC address use software utility SMAC.
We actually can not change the MAC, its reside in interface's Red Only Memory(ROM). We only "clone" the address that saved in Windows registry. And also please be careful, some software and Internet Service Provider use MAC address to identify its legal client.
Side story
.......................................................
Some network filtering system like Mikrotik, use MAC Address for authorization access. Example, your boss with MAC 00-08-88-99-99-FF has full access to any web site address. Meanwhile, you with MAC 00-88-98-00-AA-BB only allowed to access certain web site address. You can by pass this limitation by changing your MAC address same with your boss's one. This is called "MAC address spoofing".
Network Administrator must watch closely for any suspicious network/bandwidth activity.Idea > create client IP, MAC database, and instruct your firewall to block any connection and notify if there are clients with same MAC.
Some software, such SMAC A-MAC not only capable to change MAC, but also scan MAC within your network. You can monitor for "naughty user" that clone MAC.
 |
| Example A-Mac in action: scanning MAC within LAN. |