Write a simple cron job or startup script on this sentinel device. When the device boots up after a power failure, it automatically broadcasts the Magic Packets to your power-hungry workstations and servers.
Integrating an APC Uninterruptible Power Supply (UPS) with Wake-on-LAN creates a bulletproof infrastructure. This combination ensures your data remains safe during a blackout and allows your hardware to restart automatically or remotely once power returns. Why Pair an APC UPS with Wake-on-LAN?
Wake-on-LAN (WoL) is a powerful network protocol that allows you to turn on a computer remotely by sending a "magic packet" over the network. However, combining WoL with an Uninterruptible Power Supply (APC UPS) introduces a common frustration: after a power outage drains the battery and shuts down the system, the computer often refuses to wake up remotely once power returns.
Windows and Linux handle power states strictly. If the OS disables the network card during shutdown, WoL will fail. Open Device Manager and expand Network adapters . Right-click your Ethernet controller and select Properties . apc ups wake on lan best
| Task | Command / Location | |---|---| | Enable WOL BIOS | BIOS/UEFI power settings | | Enable OS NIC wake | Device Manager or ethtool (wol g) | | Send WOL locally | etherwake/wakeonlan/Send-WOL | | Remote across subnets | Router forwarding or WOL relay/VPN | | UPS-based orchestration | PowerChute / SNMP traps / Network Management Card |
Since the UPS itself won't "wake" your PC over the network, the most reliable configuration involves the following steps:
APC Back-UPS and Smart-UPS models often have two groups of outlets: Write a simple cron job or startup script
When an APC UPS detects a prolonged power outage, its management software (like PowerChute) triggers a graceful shutdown of your operating system to prevent data corruption.
Whether you are sending WoL packets from inside or
The OS must allow the network adapter to enter a low-power listening state without fully shutting down its power pins. For Windows Server / Windows 10 & 11: Right-click the Start menu and open . This combination ensures your data remains safe during
If you specifically need to wake a machine from a low-power standby mode (S3/S4) while the UPS is still on, use one of these external methods:
Ideal for servers and enterprise environments. These units feature SmartConnect ports or slots for Network Management Cards (NMC), allowing direct network-based power control.
Your server's (Windows, Linux, Proxmox, etc.)