The System > Register page in the web interface is used to activate features in software installations on non-Netgate hardware. To register, you'll need an activation token from Netgate. However, if you have a Netgate appliance purchased with pfSense Plus, it's usually pre-registered and will not show this registration page at all.

Are you using an or custom DIY hardware ?

Netgate has acknowledged this as a known issue, noting that "it's purely a cosmetic issue so no need to panic". The recommended course of action is to contact support@netgate.com for assistance. A fix from Netgate Customer Support typically resolves the problem.

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 .

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

or custom "white box" hardware, the system will display either a physical manufacturer serial or a software-generated ID. Netgate Documentation Where to Find the Serial Number WebGUI Dashboard : Navigate to the main status page. In the System Information

For official , the serial number is a unique physical identifier used to track warranties and support eligibility.

Always ensure that you have a recent backup of your configuration. This doesn't directly involve the serial number but is crucial for disaster recovery and setting up a new system.

Key takeaways include:

The response would be a JSON object containing all the system details, including those unique identifiers, making it trivially easy to integrate into larger asset management or monitoring solutions.

(This often reveals the specific Netgate device ID and hardware serial).