I would like Kali Linux to change the MAC addresses of both my network interfaces (eth0 and wlan0) on startup to randomly generated ones. How would I go about doing this?
2 Answers
You can use the macchanger program which comes preinstalled in kali.
Follow the instructions at this kali forum to configure it to start at boot.
This Link discusses how to do it without macchanger
You can program your computer to automatically generate a random MAC address upon reboot by entering the following commands in Terminal:
First, login as root, then enter crontab -e.
This will either load a program, or allow you the option to select a program to load it with. (I recommend nano.)
Once crontab is loaded, enter a new line at the bottom like this: @reboot macchanger -r eth0.
(Make sure it does NOT have a # before the line. The pound sign basically tells the program, "ignore this line.")
Then just "Write Out" (save) and exit crontab. Reboot your computer to test it.
You may encounter an issue, like I have, where the randomly generated MAC address does not grant network access.... don't freak out, simply generate a new one with macchanger -r eth0 until it does. I haven't found a way to avoid that yet... it's annoying, but at least it'll keep you from footprinting your real MAC address somewhere you don't want it.
