Edit

[EDIT] FILE: 85-nm-unmanaged.rules

# Do not modify this file, it will get overwritten on updates.
# To override or extend the rules place a file in /etc/udev/rules.d

SUBSYSTEM!="net", GOTO="nm_unmanaged_end"
ACTION!="add|change|move", GOTO="nm_unmanaged_end"

# VirtualBox host networking. Out-of-tree driver that looks like an ordinary
# Ethernet. No parent device (lives in /virtual/), no support for ethtool
# to identify the driver, MAC address defaults to 08:00:27:, but can be
# changed. Interface name will have to do, it's always vboxnet*.
ENV{INTERFACE}=="vboxnet[0-9]*", ENV{NM_UNMANAGED}="1"

# VMWare host networking. Out-of-tree driver that looks like an ordinary
# Ethernet. No parent device (lives in /virtual/), no support for
# ethtool to identify the driver. They have their own MAC prefix that
# can not be changed.
ATTR{address}=="00:50:56:*", ENV{INTERFACE}=="vmnet[0-9]*", ENV{NM_UNMANAGED}="1"

# Parallels Workstation host networking. Out-of-tree driver that looks like
# an ordinary Ethernet. No parent device (lives in /virtual/),  no support for
# ethtool to identify the driver and the interface name is too generic.
# However, they have their own MAC prefix that can not be changed.
ATTR{address}=="00:1c:42:*", ENV{INTERFACE}=="vnic[0-9]*", ENV{NM_UNMANAGED}="1"

# Virtual Ethernet device pair. Often used to communicate with a peer interface
# in another net namespace and managed by libvirt, Docker or the like.
# Generally we don't want to mess with those. One exception would be the
# full system containers, like LXC or LXD. LXC containers run via libvirt
# don't use udev, so this doesn't apply. LXD does, though. To deal with the
# LXD situation, let's treat the devices called eth* as regular ethernet.
ENV{ID_NET_DRIVER}=="veth", ENV{INTERFACE}!="eth[0-9]*", ENV{NM_UNMANAGED}="1"

# USB gadget device. Unmanage by default, since whatever created it
# might want to set it up itself (e.g. activate an ipv4.method=shared
# connection).
ENV{DEVTYPE}=="gadget", ENV{NM_UNMANAGED}="1"

LABEL="nm_unmanaged_end"

CANCEL