For my remote shack an IBM ThinkCentre M92p is used. This device is capable of Wake-on-LAN features but for some reason this is not active by just activating it in the BIOS. The solution is to use ethtool to set the corresponding setting within the running operating system. This can be done upon boot by having it being executed by systemd. The config file /etc/systemd/system/wol.service looks as follows:
[Unit]
Description=Enable Wake On Lan
After=network-online.target
Requires=network-online.target
[Service]
Type=oneshot
ExecStart = /usr/sbin/ethtool -s eno1 wol g
[Install]
WantedBy=basic.targetOn Ubuntu systems ethtool may have to be installed manually as not installed by default. After creating the file just reload the daemons and enable the new system service:
sudo systemctl daemon-reload
sudo systemctl enable wol.service