WinNUT (now primarily used via the WinNUT-Client V2 fork) is a Windows-based application that allows your PC to act as a “slave” or “client” to a Network UPS Tools (NUT) server. This setup is essential for network administrators who need to ensure Windows machines shut down safely when a UPS (connected to a NAS or Linux server) loses power. Step 1: Prepare the NUT Server
Before configuring the Windows client, your NUT server (e.g., Synology NAS, QNAP, or Raspberry Pi) must be set to allow external connections.
Enable Network UPS Server: In your server’s settings (e.g., Synology’s “Hardware & Power”), check the box for “Enable network UPS server”.
Permit IP Addresses: Add the IP address of your Windows PC to the list of “Permitted Devices”.
Note Credentials: Most servers use default credentials for clients: Username: upsmon (or admin for QNAP) Password: secret (or 123456 for QNAP) Step 2: Install WinNUT-Client
Download: Get the latest WinNUT-Setup.msi from the official GitHub Releases.
Installation: Run the installer. It is recommended to uninstall any manufacturer-specific UPS software (like PowerChute) beforehand to avoid conflicts.
Run as Administrator: On Windows 7 or newer, run the configuration tool as an Administrator to ensure it can correctly register the background service. Step 3: Configure Connection Settings
Open the WinNUT Client and navigate to the Settings or Connection tab to enter the following:
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