Managing devices outside business hours can be challenging when computers are powered off. Whether performing software updates, deploying patches, conducting maintenance, or providing remote support, IT teams often need a way to access devices without requiring users to leave them running. Wake-on-LAN (WoL) is a technology that allows a computer to be powered on remotely through a network signal. When configured correctly, Wake-on-LAN can help organizations improve device management, reduce energy consumption, and support remote administration workflows.
What is Wake-on-LAN?
Wake-on-LAN is a networking feature that enables a powered-off or sleeping computer to be awakened remotely. The process works by sending a special network packet, often called a magic packet, to the target device's network adapter. When the network adapter detects the packet, it signals the system to power on.
Wake-on-LAN is commonly used for:
- Remote administration
- Software deployment
- Patch management
- System maintenance
- Remote support
- After-hours troubleshooting
How does Wake-on-LAN work?
For Wake-on-LAN to function, several components must work together:
- A compatible network adapter
- Motherboard support
- BIOS or UEFI configuration
- Operating system settings
- Network connectivity
When a magic packet reaches the device, the network adapter recognizes it and triggers the startup process. Because the computer is technically not fully disconnected from power, the network adapter remains capable of monitoring incoming traffic.
Before configuring Wake-on-LAN
Verify that the target device supports Wake-on-LAN. Most modern business desktops and many laptops support the feature, but capabilities vary by manufacturer and hardware model. You should also confirm:
- BIOS or UEFI support
- Network adapter compatibility
- Administrative permissions
- Network accessibility
Some wireless adapters do not support Wake-on-LAN functionality.
Step 1: Enable Wake-on-LAN in BIOS or UEFI
Wake-on-LAN must usually be enabled at the firmware level.
Steps
- Restart the computer.
- Enter BIOS or UEFI setup.
- Locate power management settings.
- Enable:
- Wake-on-LAN
- Power On by PCI-E
- Network Wake-Up
The exact setting name varies between manufacturers.
Save the changes and restart the device.
Step 2: Configure Windows network adapter settings
Next, configure the network adapter.
Steps
- Right-click the Start button.
- Select Device Manager.
- Expand Network adapters.
- Right-click the network adapter.
- Select Properties.
Power Management tab
Enable:
- Allow this device to wake the computer
- Only allow a magic packet to wake the computer
Advanced tab
Look for settings such as:
- Wake on Magic Packet
- Wake-on-LAN
- Shutdown Wake-On-LAN
Enable any relevant options.
Step 3: Verify power settings
Certain power management configurations may interfere with Wake-on-LAN.
Steps
- Open Control Panel.
- Select Power Options.
- Review advanced power settings.
- Confirm that network-related wake functionality is not restricted.
Fast Startup may also affect Wake-on-LAN behavior on some systems.
Step 4: Identify the device's MAC address
Wake-on-LAN packets are typically sent to the target device's MAC address. To find the MAC address:
- Open Command Prompt.
- Run: ipconfig /all
- Locate the active network adapter.
- Note the Physical Address value.
This address is required by most Wake-on-LAN tools.
Step 5: Test Wake-on-LAN
After configuration:
- Place the computer in sleep mode or shut it down.
- Send a Wake-on-LAN packet using a compatible tool.
- Verify that the system powers on successfully.
If the device does not respond, review BIOS settings, adapter configuration, and network accessibility.
Common Wake-on-LAN issues
If Wake-on-LAN isn't working, check:
- BIOS or UEFI configuration
- Network adapter settings
- Power management settings
- Firewall restrictions
- MAC address accuracy
- Router configuration
- Hardware compatibility
Many Wake-on-LAN issues stem from a missed configuration step rather than a hardware problem.
How TeamViewer uses Wake-on-LAN
Wake-on-LAN becomes especially valuable when combined with remote access tools. TeamViewer supports Wake-on-LAN functionality, allowing authorized users to remotely wake devices and establish remote connections when needed. This enables IT teams to perform maintenance, deploy updates, access systems after hours, and provide support without requiring devices to remain powered on continuously. For organizations managing distributed workforces, combining Wake-on-LAN with remote access can improve operational efficiency while helping reduce energy consumption.
Best practices for Wake-on-LAN deployments
To maximize reliability and security:
- Document Wake-on-LAN configurations
- Restrict remote access permissions
- Test functionality regularly
- Keep network drivers updated
- Monitor device availability
- Follow organizational security policies
Proper configuration helps ensure that devices can be accessed when needed without introducing unnecessary risk.
Final thoughts
How to configure Wake-on-LAN
Wake-on-LAN provides a convenient way to power on devices remotely, enabling IT teams to perform maintenance, updates, and support activities without requiring users to leave systems running. By configuring firmware settings, network adapters, and power management options correctly, organizations can take advantage of a simple but powerful remote management capability. When combined with remote access solutions, Wake-on-LAN can help improve efficiency, support flexible work environments, and simplify endpoint administration.