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Wake on LAN (WoL) - Ubuntu Setup

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Enable in BIOS

Usually under power management.

Enable in OS

Install ethtool

apt install ethtool -y

Show network interfaces and find Ethernet interface ID (here the ID is enp12s0)

$ ip addr
1: enp12s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
...

Show its current configuration

$ sudo ethtool enp12s0
...
	Supports Wake-on: pumbg
	Wake-on: g
...

Wake-on-LAN Options

Set Wake-on-LAN options. Not all devices support this. The argument to this option is a string of characters specifying which options to enable.

  • p Wake on phy activity
  • u Wake on unicast messages
  • m Wake on multicast messages
  • b Wake on broadcast messages
  • a Wake on ARP
  • g Wake on MagicPacket(tm)
  • s Enable SecureOn(tm) password for MagicPacket(tm)
  • d Disable (wake on nothing). This option clears all previous options.

Set Wake-on-LAN Options

Temporarily Set Options

the following resets after computer restart

ethtool -s enp12s0 wol g
Permanently Set Options

create a service file /etc/systemd/system/wol.service with the following

[Unit]
Description=Enable Wake On Lan
# Run after everything else
After=multi-user.target network-online.target default.target
Wants=network-online.target

[Service]
Type=oneshot
ExecStart = /usr/sbin/ethtool --change enp12s0 wol g

[Install]
WantedBy=default.target

sudo systemctl daemon-reload
sudo systemctl enable wol.service
systemctl status wol

Verify

Send magic packet (see: wakeonlan)