====== Ubuntu networking ======


===== 18.04 netplan =====

==== Disable default gw multiple ifaces ====

According to this answer, it should be possible with dhcp4-overrides, however that is not supported in Ubuntu as of 18.04. My workaround was to create a hook script in /etc/networkd-dispatcher/routable.d/ to remove the default route:

    #!/bin/sh

    # Only remove the default route on the second interface, e.g. eth1
    [ "$IFACE" != eth1 ] && exit 0

    # delete the default route for this interface
    ip route del default dev eth1