Enable TrueNAS Wake On Lan permanently

README.md

Enabling WoL on a TrueNAS System

Source: https://www.truenas.com/community/threads/enable-wol.95856/

As an Admin user you can use the ethtool with sudo rights to check if WoL is available on your system. The usual ethernet NIC name is "enp3s0" so I use everytime this name.

Check if WoL is available

sudo ethtool enp3s0

Supports Wake-on:
 - d available and inactive
 - g available and active

# turn on WoL once
sudo ethtool -s enp3s0 wol g

You can now check with sudo ethtool enp3s0 if now the supports WoL is turned to g, which means -> active

To proof, you can shutdown and send a magic package to your MAC address. (Use Android app or wake-on-lan tool from a different OS)

If this is working, you can be happy for a few minutes. Unfortunatelly, the step above is not permanently persisted, so you have to do it after each reboot (because after your reboot, the configuration is gone.

Make it permanently

• switch to root user and create a script which does the step above

Create a script

1. change to root user

sudo su root

2. create the script

cat >> /root/wol_fix.sh <<EOF
#!/bin/bash
ethtool -s enp3s0 wol g
EOF

3. add execution flag to that script

chmod 755 /root/wol_fix.sh

Try it! Change the WoL config back to "d" manually. ethtool -s enp3s0 wol d and execute your script as root /root/wol_fix.sh Check if the configuration changed back to "g".

Start a service on boot, which executes the script

cat >> /etc/systemd/system/wol_fix.service <<EOF
[Unit]
Description=Fix WakeOnLAN being reset to disabled on shutdown

[Service]
ExecStart=/root/wol_fix.sh
Type=oneshot
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target
EOF

# Reload the systemd manager configuration.
systemctl daemon-reload

# start the wol_fix.service
systemctl start wol_fix

# Enable to wol_fix service script.
systemctl enable wol_fix.service

If everything works as expected, you have now permanently WoL enabled.