Finding the serial number for a pfSense device depends on whether you are using official Netgate hardware or a custom-built machine. For official Netgate appliances, the serial number (often called the Netgate Device ID ) is the primary identifier for support and subscriptions. 1. Through the Web Interface (GUI)
field will display the unique hardware ID assigned at the factory. Generic Hardware: pfsense serial number
: If you are using a third-party server (like Dell or HP), pfSense may display the hardware serial number in the same widget, provided the BIOS populates that field. If it's not found, you may see a "Host UUID" instead. 2. Locate Serial Number via Command Line (CLI) Finding the serial number for a pfSense device