Method 2: Find the Serial Number Using the Command Line (CLI)

Both official Netgate hardware and DIY white-box installations.

The is a SHA256-hashed value unique to your pfSense installation. Because hardware serial numbers aren't universal, Netgate created the NDI as a consistent way to identify pfSense systems for support contracts. The NDI is generated from available system information, and Netgate cannot reverse-engineer it to access other data—it knows only that the NDI is associated with a particular support contract.

Check the underside of the rubber feet or the base plate of the desktop enclosure. Why Do You Need Your pfSense Serial Number?

White-box manufacturers frequently omit serial numbers from the motherboard BIOS to cut production costs.

This guide covers all methods for locating your pfSense serial number, from physical inspection to command-line queries. Why Do You Need the pfSense Serial Number?

The Ultimate Guide to Finding Your pfSense Serial Number Finding your pfSense serial number is essential for registering hardware, verifying warranty coverage, and accessing official Netgate technical support. Whether you are running a commercial Netgate appliance or a custom Netgate installer on your own hardware, locating this unique identifier is a straightforward process.

Connect to your pfSense device via or a USB console cable . Log in as admin or root . In the pfSense text menu, select Option 8) Shell .