Change or Spoof a MAC Address in Windows or OS X
Host 1 FF , who has the IP FE so you can respond back to me. Host 2 Hello DE: FE, I have IP You can see the ARP table of a box by dropping out to a command prompt and typing "arp —a" in Windows or just "arp" in Linux. All it takes is two easy to script commands:. These two little commands would set your eth0 interface to use the MAC Changing your MAC address is one of those things that is much easier to do in Linux then under Windows.
My understanding is that there are complications with some AirPort cards so you may also want to read:.
Stefan Person sent me the following note that should help you get it to work:. In XP you can use the regedit to edit the registry from a GUI or the reg command to edit it from the console, I'll be using regedit. Under this key you will find a bunch of sub keys labeled as , , and so forth.
Change Windows MAC Address
We can assume any MAC address we want by finding the key that controls the NIC we want to change, putting in a string value called "NetworkAddress" and setting it to the MAC address we want to use formatted as a twelve digit hex number example: To find out which key is which we can search through them for the value "DriverDesc" until we find the one that matches the NIC we wish to alter.
Use Mac Makeup http: Smac has a nice GUI and was free but has since gone commercial, there's no reason to bother with it as there are free tools that are just as good. Have fun with your MAC addresses switching, but be careful not to cause network problems.
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After I posted my article Benjamin E. Pratt emailed me some other notes on changing your MAC address on different platforms and in different ways:. Added note sent to me by Stefan Person. First posted.
Changing Your MAC Address/Windows - Wikibooks, open books for an open world
Printable version of this article 15 most recent posts on Irongeek. To put this in Socratic Dialog form with just a touch of Stallone: To get past MAC address filtering on a router. Having two hosts on the same network can cause some network stability problems, but much of the time it's workable. This is one of the reasons why MIC Address filtering on a wireless router is pointless.
Interestingly, a lot of hotels use MAC filtering in their "pay to surf" schemes, so this method can be an instant in for cheap skate road warriors. Sniffing other connections on the network. By assuming another host's MAC as their own they may receive packets not meant for them.
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