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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).

Netcut-Defender download

Download’s NetcutDefender here. It’s Free and safe.

Latest update:

Dear users,

Base on top of 2.1.2, 2.1.4 has released, 2.1.4 fixed a couple of bugs.


  • Support Real time view of “who cut me”,
  • Support change gateway/change network on fly. (i.e) when you switch WIFI network from Starbuck to mcdonalds network, you don’t need restart netcut defender.

In Details:


Here is how to see who attack you.You will know someone is trying to cut you off when you see this .When the attacker stopped the attack, or normal time, you will see NetCut Defender Icon as this

Right click on Netcut-Defender you will see a new Menu link name “who cut me” as

When you click on “Who Cut me”, you will see it’s IP/MAC/Hostname right away.

The Attack Record are like this


  • “network change reload/Gateway change reload”.  when you switch WIFI network from Starbuck to mcdonalds network, you don’t need restart netcut defender. to ensure your netcut defender has the right information (it does when you do restart The app, but I want it to be better that can do without restart)


So, only one button “Protection Reload” you need to click , here