You can find the serial number of your pfSense device through the web interface, the command line, or physical labels on the hardware. 1. pfSense Dashboard (WebGUI)
The serial number will be listed under the "System" section of that widget.
The fastest and least intrusive method to find your serial number is through the pfSense web-based graphical user interface (WebGUI). This method works remotely without requiring physical access to the device or command-line execution. Steps to Find It on the Dashboard: pfsense serial number
A pfSense serial number is a unique identifier assigned to a pfSense device during the installation process. It is a 16-character alphanumeric code that serves as a distinctive marker for your device, allowing you to identify and manage it within your network infrastructure. The serial number is usually generated based on the device's hardware configuration and is stored in the device's configuration file.
You likely cloned a VM or restored a config backup from one Netgate device to another. The unique system ID and the physical serial number became mismatched. You can find the serial number of your
When migrating from Community Edition to pfSense Plus, the Device ID is used to link your license to the specific machine. Hardware Replacement (RMA):
With a growing knot in her stomach, she walked to the “dead” hardware shelf. The old firewall sat there, fanless and cold. On a whim, she grabbed a serial-to-USB adapter, clipped onto its console port, and powered it on. The fastest and least intrusive method to find
: Run dmidecode -t system to see system information, including the serial number populated in the BIOS.
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Connect to your pfSense device via or a standard Console cable . Enter the menu option for the Shell (typically option 8 ).