For official Netgate appliances (such as the SG-2100 or XG-1541), the serial number is printed on a physical sticker. System serial number | Netgate Forum
There are three primary ways to locate your serial number: through the web-based interface, the command-line interface (CLI), or the physical hardware itself. 1. The WebGUI Dashboard
On the main dashboard, look for the System Information widget. pfsense serial number
If you are connected via SSH or a console cable, you can pull the serial number directly from the system environment using these commands:
You can also try running kenv to see various kernel environment variables that often include hardware identifiers. For official Netgate appliances (such as the SG-2100
Run dmidecode -t system | grep Serial to pull the serial number directly from the hardware BIOS.
If you are using official Netgate hardware, the Serial Number will be clearly listed here. The WebGUI Dashboard On the main dashboard, look
The pfSense serial number is a unique identifier primarily used to identify hardware appliances for support, warranty, and software registration. While it is most critical for official Netgate hardware, even custom builds may display a serial number or a host UUID depending on the system's BIOS. Where to Find Your pfSense Serial Number