Wander from airport to cafe? You leak a permanent identifier as you go (your mac address). And this allows you to be globally tracked.
Good news everybody, your are a couple of keystrokes from fixing this. You’ll be using network manager today. To setup randomised MAC-addresses by default to all WiFi connections, create /etc/NetworkManager/conf.d/00-random.conf like so:
[device] wifi.scan-rand-mac-address=yes [connection] wifi.cloned-mac-address=stable ethernet.cloned-mac-address=stable connection.stable-id=${CONNECTION}/${BOOT}
Afterward, reload NetworkManager:
systemctl reload NetworkManager
You can substitute stable to random if u want it to change every time rather than per connection.
You can use nmcli to allow a non-random for specific ssids (eg your home or work).
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