Wake-on-LAN can also work worldwide (over WAN Internet), in case your PC 10,000 km away gets turned off accidentally. To turn on a target PC from anywhere in the world, first you need to setup the target PC and router port forwarding (or have a VPN to the target subnet).
For simplicity/clarity we assume the following arbitrary parameters, which will be unique for your target Linux PC:
- target interface: eth0
- target PC static LAN IP: 192.168.1.100
- target public WAN IP: 18.104.22.168
- public WoL port forward: 10009
- target MAC: 00:11:22:33:44:55
remote Linux PC
Modern Linux distros such as Ubuntu 18.04 have WakeOnLan configured in NetworkManager.
- Settings → Network and select the wired LAN interface you wish to use for WakeOnLan.
- under the “Ethernet” tab, seee that “Wake on Lan: Default” is checked. No Wake on LAN password is needed for most use caes.
- copy down this “Device” hexadecimal string, this is the MAC address, and you’ll use it to turn on the PC remotely.
You can confirm you have the correct MAC address by typing in Terminal
- Shutdown remote PC for testing. Have someone nearby it in case you can’t turn it back on.
setup control PC
On your laptop:
apt install wakeonlan
Wake PC on same LAN
on control PC, on the same LAN
using the MAC address of the target PC of course.
If PC didn’t turn on, ensure BIOS/UEFI settings have Wake On Lan enabled. Try a discrete Intel Ethernet NIC, some motherboard NICs don’t work for Wake-on-LAN
setup worldwide Wake-on-LAN
To wake-on-LAN from anywhere in the world, using example parameters at top and after doing the procedure above, further do:
- Router: port forward 10009 to 192.168.1.100 port 9
- To use without Dynamic DNS service, have the PC auto-send email when the public IP address changes.
- From your control PC on a different network type in Terminal:
wakeonlan -i 22.214.171.124 -p 10009 00:11:22:33:44:55
and target PC should power on.
Legacy Linux remote PC setup
This procedure is for older Linux distros that don’t have WakeOnLan config in NetworkManager.
- install ethtool
apt install ethtool
- add the following line to
/etc/network/interfacesunder the interface you want to control
up ethtool -s eth0 wol g
/etc/init.d/halt, changing text near top to:
link/etherfor eth0–this is MAC address
- Reboot target PC, then shutdown target PC for testing