# from busters's ifupdown 0.8.32 package (as of May 2018)
[Unit]
Description=Wait for network to be configured by ifupdown
DefaultDependencies=no
Before=network-online.target
ConditionFileIsExecutable=/sbin/ifup

[Service]
Type=oneshot
ExecStart=/lib/ifupdown/wait-online.sh
RemainAfterExit=yes

[Install]
WantedBy=network-online.target