Keyboard maestro wake on lan7/5/2023 ![]() ![]() ARP requests for your LAN IPv4 address, Neighbour Discovery requests for your IPv6 address, NetBIOS name lookups for your computer name, and so on – basically packets that indicate that some other device wants to connect to you. Typically Windows sets up patterns to match e.g. In addition to the fixed-format magic packet, the NIC can be configured to recognize a few custom patterns. This feature is safe to use there are many Windows apps for Wake-on-LAN that generate such packets (e.g. Most "Wake on LAN" tools send it through UDP, but the specific protocol doesn't matter so long as it gets delivered to the NIC. You should use powercfg /lastwake or Get-EventLog System -Source Microsoft-Windows-Power-Troubleshooter -Newest 5 | fl Message to check what actually triggered the resume from sleep.Ī packet that specifically requests Wake-on-LAN – it has your MAC address in it 16 times in a specific format. In recent Windows versions, the "UpdateOrchestrator" has been known to wake the OS from sleep through a Task Scheduler job (one which Microsoft deliberately makes very difficult to disable), and even to keep the OS from suspending automatically (apparently due to a bug that was fixed in October's update). You can use powercfg /waketimers to check whether there are any RTC wakeup requests. to run a scheduled task or install Windows updates overnight. The OS can program it to wake the system at some future time, e.g. That's not actually a complete list – there's one device that can wake the system but is never listed there, namely your RTC (the computer's hardware clock). In this list were my mouse and keyboard, and my NIC (Realtek PCIe controller). This let me see which devices have permission to automatically wake the PC. I opened CMD with Admin priveleges, and entered powerconfig/devicequery wake_armed. Now I am concerned about the security of my PC, because I do not understand enough about why magic packets are considered or from where magic packets originate. I disabled them mainly because I want to sleep without being woken up myself in the middle of the night. After brief research, it seems like something akin to a broadcast packet being heard on my interface was enough to wake the PC. I went into the Advanced settings for the device, and sure enough both the "Wake on pattern match" and "Wake on magic packet" were enabled. I am not sure why my NIC would have wake privileges by default, this seems sketchy to me. ![]() After converting to Windows 10 a while ago, I have been disturbed in my sleep by my computer randomly turning on during the middle of the night. ![]()
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