A media access control address (MAC address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. This use is common in most IEEE 802 networking technologies, including Ethernet, Wi-Fi, and Bluetooth. If your Mac is set up to connect to a Wi-Fi network, it can analyze the connection for issues that affect its performance, including its connection to the Internet. If you've followed the steps to connect your Mac to a Wi-Fi network, but the connection to your network or the Internet isn't reliable, the steps in this article might help. A MAC address is assigned by manufacturers and embedded into the device's network interface card - it's permanently tied to the device, which means that a MAC address cannot be changed. The MAC address of the card ether is 00, a0, cc, da, da, da. You can buy a network adapter separately from most manufacturers that supply routers and other forms of networking purchasing a network adapter, some prefer to choose the brand of adapter that matches their router. Each network card on your computer has a built-in unique MAC (Media Access Control) address that can be used to identify your computer. This is usually fine, but it is possible to change it natively in OS X. RELATED: What Exactly Is a MAC Address Used For?
Our network card has at least two addresses or identificators, the IP address we all know which can be dynamic and the physical address, the mac address which is unique for each device, it is the hardware address. Changing our mac address may be useful to avoid leaving logs with our real address on another computer or router. Changing the mac address may be useful to clone other mac addresses forcing them to get disconnected from a network and connecting again, useful to sniff the password when reinserted.In this brief tutorial you’ll learn how to check your mac address and how to edit it randomly or for a specific replacement mac address.
For this tutorial I will work on the network card enp2s0, replace this network card for yours (e.g eth0, wlan0, etc.)
To check your mac address just execute:
We can see on the enp2s0 network card the mac address is d0:17:c2:12:3c:cd while the wlp3s0 wifi card mac address is a2:58:a6:6a:29:04. Mac addresses 12 digits, 6 fields of 2 characters and letters separated by “:” like XX:XX:XX:XX:XX:XX.
The first 6 characters and numbers belong to the device manufacturer, in my case d0:17:c2 belongs to ASUS. The last 12 digits are the ID number for the hardware and it is unique.
First of all, to edit our network card mac address we need to disable our network card, the mac can not be changed while the card is being used. To disable our network card run:
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Then, to edit our mac address type:
Then enable the network card back by typing:
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If you need to edit our mac frequently maybe is convenient to use a program called macchanger, to install it on Debian or Ubuntu systems run:
During the installation you’ll be asked if macchanger should start when a networking device is enabled, here you can decide whatever you want, changing your mac address by default shouldn’t create problems unless you have your router configured to accept specific mac addresses.
Select any of the options and press enter to finish.
After macchanger is installed we can also check our mac address by typing
![Network Network](/uploads/1/1/8/6/118661330/864090359.jpg)
As you can see it matches with the mac address exposed using ifconfig.
Here Macchanger shows the current mac, the real hardware’s mac (Permanent MAC) and the new one if you assign it.To change your mac address fast for a random address simply run:
Make sure you run macchanger as root and that the network device is down. If you get an error when running this command then run: Express scribe transcription for mac.
To disable your network card, after it type “ifconfig” again and you’ll see your network card wont show up.
Then run
macchanger -r
again.If we want to assign our card a specific address we can execute:
For example
If we set our card up and run an ifconfig we’ll see our new mac address.
After editing our mac address we need to enable the network card back, for this run::
Now we can see our system also displays the new mac address 32:ce:cb:3c:63:cd.
Firewalls and IDS can contain policies whitelisting and banning specific mac addresses. Manipulating our network cards’ physical address is a great step to avoid leaving traces in logs and increase your privacy by masking your device or to bypass security obstacles when pentesting a network, the most common use as said at the starting is when we want to crack a wifi access dissociating a connected device with the aircrack suite by cloning it’s mac address.
Network Card For Macbook Pro
I hope you found this tutorial on macchanger useful, keep following LinuxHint for more tips and updates on Linux.