Media Access Control address, a hardware address that uniquely identifies each node of a network. In IEEE 802 networks, the Data Link Control (DLC) layer of the OSI Reference Model is divided into two sublayers: the Logical Link Control (LLC) layer and the Media Access Control (MAC) layer. The MAC layer interfaces directly with the network medium.Consequently, each different type of network medium requires a different MAC layer. On networks that do not conform to the IEEE 802 standards but do conform to the OSI Reference Model, the node address is called the Data Link Control (DLC) address.
If you want to change your network card mac address you need to use simple utility called mac changer.MAC changer is a utility for manipulating the MAC address of network interfaces
You're in a DHCP network with some kind of IP-based restriction
You've a cluster that boot with BOOTP and you want to have a clean set of MACs
Debug MAC based routes
MAC Changer Features
Set specific MAC address of a network interface
Set the MAC randomly
Set a MAC of another vendor
Set another MAC of the same vendor
Set a MAC of the same kind (eg: wireless card)
Display a vendor MAC list (today, 6800 items) to choose from
Install MAC Changer in Debian
#apt-get install macchanger
Install MAC Changer in Ubuntu
sudo apt-get install macchanger
This will complete the installation.
If you Find your MAC address using the following command
eth0 Link encap:Ethernet HWaddr 00:0C:29:A8:D0:FA
inet addr:172.20.22.35 Bcast:172.20.22.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fea8:d0fa/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7690 errors:0 dropped:0 overruns:0 frame:0
TX packets:6399 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:4284579 (4.0 MiB) TX bytes:876317 (855.7 KiB)
Interrupt:177 Base address:0x1080
In the above example MAC Address is 00:0C:29:A8:D0:FA
If you want to configure MAC Changer you need to stop the networking services using the following command
For Debian Users
For Ubuntu Users
sudo /etc/init.d/networking stop
Now you need to configure your MAC address using the following examples
MAC Changer Syntax
macchanger [options] device
# macchanger eth1
Current MAC: 00:09:a5:eb:23:f7 (Hansung Eletronic Industries Development Co., Ltd)
Faked MAC: 00:09:a5:eb:23:f8 (Hansung Eletronic Industries Development Co., Ltd)
macchanger --endding eth1
Current MAC: 00:09:a5:eb:23:f8 (Hansung Eletronic Industries Development Co., Ltd)
Faked MAC: 00:09:a5:6f:31:23 (Hansung Eletronic Industries Development Co., Ltd)
macchanger --another eth1
Current MAC: 00:09:a5:6f:31:23 (Hansung Eletronic Industries Development Co., Ltd)
Faked MAC: 00:11:18:5b:3a:1f (Blx Ic Design Corp., Ltd.)
# macchanger -A eth1
Current MAC: 00:06:5b:f6:f3:48 (Dell Computer Corp.)
Faked MAC: 00:0d:11:93:0c:4f (Dentsply -- Gendex)
# macchanger -r eth1
Current MAC: 00:0d:11:93:0c:4f (Dentsply -- Gendex)
Faked MAC: 3c:f1:89:f9:1f:ce (unknown)
macchanger --mac=01:23:45:67:89:AB eth1
Current MAC: 00:40:96:43:87:65 [wireless] (Cisco/Aironet 4800/340)
Faked MAC: 01:23:45:67:89:ab (unknown)
Num MAC Vendor
--- --- ------
065 -- 00:00:7d -- Cray Research Superservers,Inc
068 -- 00:00:80 -- Cray Communications (formerly Dowty Network Services)
317 -- 00:40:a6 -- Cray Research Inc.
Here is the list of available options for MAC Changer
Show summary of options.
Show version of program.
Don't change the vendor bytes.
Set random vendor MAC of the same kind.
-A Set random vendor MAC of any kind.
Set fully random MAC.
Print known vendors (with keyword in the vendor's description string)
Set the MAC XX:XX:XX:XX:XX:XX
If you completed the your MAC address changes you need to start the networking service using the following command
For Debian Users
For Ubuntu Users
sudo /etc/init.d/networking start