If the WebGUI is inaccessible or doesn't show the information, you can use the shell.
. This is a unique identifier generated by pfSense software to tie support contracts to specific hardware. It is prominently displayed in the System Information widget and the console/SSH banner. 3. Command Line Interface (CLI) pfsense serial number
If you cannot access the web interface, you can retrieve the serial number via the shell (SSH or Console). Using dmidecode: You can install and use the tool to pull hardware info directly from the BIOS. /usr/local/sbin/dmidecode -s system-serial-number Using kenv: Some systems store this in the kernel environment. kenv smbios.system.serial 4. Physical Labels For physical appliances, check the following locations: Bottom or Back: Most official Netgate Security Gateways have a sticker with the serial number and NDI. Original Packaging: The serial number is typically printed on the product box. Why You Need It System serial number | Netgate Forum If the WebGUI is inaccessible or doesn't show
pfSense serial number is a unique identifier primarily used to verify hardware authenticity and manage Netgate Service and Support . Depending on whether you are using official Netgate appliances It is prominently displayed in the System Information
Finding the serial number for a pfSense system is essential for verifying hardware support, checking warranty status, or identifying a device within your network
He opened a ticket with Netgate Support, attaching the output of cat /etc/version . Within minutes, support identified the serial as part of a batch with known eMMC wear issues. Because the serial number was on file, they sent a replacement RMA unit overnight—no questions asked.
On Netgate hardware, a small silver sticker on the underside of the device (or near the power port) lists:
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