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: If you are using official Netgate hardware, the Serial Number will be clearly listed here. pfsense serial number
| Command | Purpose | Context |
| :--- | :--- | :--- |
| dmidecode -t system | View full hardware info (Manufacturer, Model, S/N) | Useful for identifying generic hardware. |
| pfSsh.php playback enablesshd | Enable SSH if locked out | Allows remote CLI access to find serial. |
| cat /var/etc/platform | Check installed platform | Confirms if running CE or Plus. | Finding the serial number for a pfSense device
On Netgate hardware, a small silver sticker on the underside of the device (or near the power port) lists: Through the Web Interface (GUI) Field: If you
For Custom Hardware: If dmidecode is installed, it may show the motherboard serial number, though this is not a "pfSense serial" in the same way Netgate's ID is. 3. Physical Label
For official Netgate hardware, the serial number is a unique physical identifier used to track warranties and support eligibility.
Documentation: Keep a record of your pfSense installations, including their serial numbers, especially if you manage multiple installations.