Category Archives: Support Documents

NetCut / netcut defender/ netcut for android related document

Use NetCut to Change MAC address of a adapter support XP/Windows Vista / Windows 7

Change MAC address of a adapter freely ?   Clone MAC address from a local network by one click?

Yes. With netCut 2.0.9, it’s do able . and it’s easy/free/fast/safe.    I hope this help some users that use netcut for years and had discover other useful than “cut” .  Enjoy!


Before you click on Change, you must has done following

1. Select a adapter to change.

2. Select a PC to clone MAC address from

3. Click on “Change Mac ” Button


When you Click on “Change” Button,  Following action happen

1.  NetCut stop monitor the adapter

2.  NetCut Stop send packets to the gateway and the been dealed PC.

3.  NetCut read the MAC address from the input box and write it as the MAC of your current netCut selected network adapter.

4. Disable the network adapter.

5. re-enable the network adapter.

——-> Note: step 3, 4 and 5 may fail when you are not local admin . or you are running firewall that prevent “change register/change network status” action.  when it fail. netcut will raise a window stat it, and you will need to manually restart the network adapter.  and restart netCut

6. netcut resume monitor/sending packets to gateway .

What is “Clone MAC address from a PC in your network”

1. Select PC from the NetCut’s detected PC list.

2. Click on Button “Change MAC”

3. The screen should shows the full details of selected including


  • MAC address
  • IP address
  • Host name( some may not shown as not following a netBios && reverse DNS protocal)

This is the PC you going to clone MAC address from

4.  Click on “Change”.   this will set your own PC’s netcard Mac address to be the same as the PC’s.   Note: some of the win7&&windows 8 wireless card may not allow you change MAC address, just force use XP version’s driver will overcome this limitation.

5. Click on “Restore factory default setting”, this will set your PC’s netcard’s MAC address back to normal.


How to set a well-formed MAC address

MAC address need to be 12 length of string that from 0123456789 and ABCDEF , any value other than those will be invalid to Operation System.

Good Example: [00:50:56:C0:00:08]

Bad Example: [00:50:56:C0:00:0X]

You can find your own PC’s MAC address by do

1. cmd

2. ipconfig /all

Also, from netcut netcard interface, you can also get your netcard adapter’s mac address information.

How to Manually Change MAC address

Under Windows XP, the MAC address can be changed in the Ethernet adapter’s Properties menu, in the Advanced tab, as “MAC Address”, “Locally Administered Address”, “Ethernet Address” or “Network Address”. The exact name depends on the Ethernet driver used; not all drivers support changing the MAC address in this way.

However, a better solution – requiring Administrative User Rights – is to pass over the System Registry Keys under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}. Here settings for each network interface can be found. The contents of the string value called ‘NetworkAddress’ will be used to set the MAC address of the adapter when next it is enabled. Resetting the adapter can be accomplished in script with the freely available command line utility devcon from Microsoft, or from the adapters context menu in the Network Connections control panel applet.

Note: to check your MAC address easily on a Windows XP box, go to Run, type CMD, then type “ipconfig /all” without quotation in the command prompt. The number under physical address is the MAC address. If multiple IP are displayed, you should look under the label “Ethernet adapter x”, where x is the name of your connection (which is Local Area Connection by default).