Changing the MAC is a matter of privacy. There are different reasons why it is recommended to change the MAC of your device. One of them is if you are going to connect to a public network where there are more users connected.
Remember that the MAC is an identification of the physical hardware, of your network card and is unique to your computer.
It is always recommended, for security, to change the MAC when you connect to a public Wi-Fi network or a VPN.
We have 3 different shapes. We are testing on Ubuntu 20.04 LTS
We're going wireless
and then to our WIFI
You will see your MAC address, you just have to enter a new one in the Colned Address. To check the new mac we can put
ip link ls
Changing it with the terminal
We deactivate the card
sudo ip link set dev wlp4s7 down
We configure the new cloned MAC Spoofed MAC, assigning the one we want to our card
sudo ip link set dev wlp4s7 address XX:XX:XX:XX:XX:XX
We activate the card
sudo ip link set dev wlp4s7 up
If you want to check that it is changed, do as before
ip link ls
Changing it with MACChanger
We open a terminal and update the packages before installing
sudo apt update
We install MACChanger
sudo apt install macchanger -y
shows us the following screen, to see if we want to change the MAC or default when starting the computer
I have chosen not.
To check the version we have of MACChanger
macchanger --version
It returns something like
To see the network interfaces we have, we type
ip addr sh
Once we have seen our interfaces, we choose the one we want to change and we can check it with
macchanger -s wlp4s7
And from here we have two options to change the mac manually or assign us one randomly. This very comfortable option was not available in previous methods.
To change the randomly we put
macchanger -r wlp4s7
Here -r is random and then we put the interface
to change it manually
macchanger -m b2:ee:83:a7:c7:b4 wlp4s7
where -m indicates manual, then comes the new mac and at the end the interface to which we apply it
After any MAC change, it is recommended to check that e has been changed correctly, as we have done with
macchanger -s wlp4s7
Another interesting option of MACChanger is to quickly return everything to its original state. We will use
macchanger -p wlp4s7
And if you want to uninstall MACChanger
supdo apt remove macchanger -y
or if you want to uninstall by removing dependencies
supdo apt autoremove macchanger -y
How to choose a fake MAC
There are several things to know about the MAC. The MAC is a unique identifier that manufacturers assign to their network cards. They represent 48 bits, in hexadecimal and are grouped into 6 pairs. The first 3 pairs indicate the manufacturer, so if we assign a MAC with
00:1e:c2 we will tell you that the card was made by Apple
With these search engine, you will be able to know who owns a MAC
The change of MAC together with IP hiding techniques that we have spoken about on occasion, are the basis of our privacy on the Internet.
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