Wake-on-LAN is one of those quietly powerful features that, once you start using it, you wonder how you lived without. It lets you power on a sleeping or shut-down machine remotely — so a device is always reachable when you need it, without wasting energy when you don't.
How Wake-on-LAN works
The magic is a small network packet called a magic packet. When a compatible network card receives this packet, it signals the motherboard to power on. The packet can be sent by another device on the same local network, or relayed to a remote network by a always-on gateway device.
Why it matters for remote access
Without Wake-on-LAN, an unattended machine that's been shut down or has gone to sleep is unreachable — a support ticket that can't be resolved until someone physically presses the power button. With it, you can wake the machine, connect, fix the issue and let it sleep again, all from anywhere.
The energy angle
Keeping thousands of machines powered on 'just in case' wastes a surprising amount of electricity. Wake-on-LAN lets you power devices down outside working hours and wake them on demand, cutting energy costs without sacrificing reachability. It's a rare win for both IT and facilities.
What you need to make it work
Three things: a network card and BIOS that support Wake-on-LAN, the feature enabled in both, and a way to send the magic packet — either a device on the same network or a remote access platform that can relay it. Most modern business hardware supports it; the configuration is usually the only hurdle.
Pair it with remote reboot
Wake-on-LAN gets a machine powered on; remote reboot keeps it healthy. Together they let you recover a frozen workstation, apply updates that require a restart, and reconnect automatically once the machine is back — all without a site visit. For any team managing a fleet of devices, the combination is essential.