mac random config

ubuntu-studio-20.04/30-randomize-mac-address.conf

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+# /etc/NetworkManager/conf.d/30-randomize-mac-address.conf
+
+# REQUIRES NETWORK MANAGER >= 1.4.1 (Ubuntu Zesty and above)
+
+# Thanks to https://blogs.gnome.org/thaller/2016/08/26/mac-address-spoofing-in-networkmanager-1-4-0/
+
+# This randomize your MAC address for *new* connections
+
+# Be sure to change your existing (saved) connections in
+# /etc/NetworkManager/system-connections/*
+
+# NOTE: To support captive-portals that rely on a consistent mac address,
+#       use `cloned-mac-address=stable` in /etc/NetworkManager/system-connections/[network name]
+
+[device-mac-randomization]
+# "yes" is already the default for scanning
+wifi.scan-rand-mac-address=yes
+
+[connection-mac-randomization]
+ethernet.cloned-mac-address=stable
+wifi.cloned-mac-address=random
+
+# The options are:
+#
+# - permanent: use the hardware MAC
+# - preserve: don’t change the MAC address of the device upon activation.
+# - random: generate a randomized value upon each connect.
+# - stable: generate a stable, hashed MAC address.
+#