Alternatively, on newer Netgate hardware, run:
When managing a pfSense firewall, whether it’s running on official Netgate hardware, a white-box server, or a virtual machine, administrators often find themselves searching for one specific piece of data: .
ethtool -e eth0
Finding the serial number of your pfSense device is essential for support, registration, and hardware identification. Depending on whether you are using official Netgate hardware or a custom build, the methods for locating it vary. 1. Through the Web GUI (Easiest)
An accurate serial number is required for several administrative tasks: pfsense serial number
You backup a config from an SG-3100 (serial: A1234 ) and restore it to an SG-6100 (serial: B5678 ). The config file retains A1234 in the XML, causing a conflict.
You need a valid MAC address. You can generate a random one or use a MAC address generator online. Ensure it is unique within your network. Alternatively, on newer Netgate hardware, run: When managing
Can change if you swap network cards (NICs) or crypto chips. Hardware RMAs, physical inventory tracking, and warranties.
If you own a legitimate Netgate appliance (the official hardware for pfSense), the serial number is required for support, warranty, and software updates. You need a valid MAC address
A common point of confusion is the distinction between the serial number and the Netgate Device ID. These are two separate identifiers serving different purposes. Some users have mistakenly attempted to use the serial number where the NDI was required, leading to registration failures.
For official Netgate hardware, the serial number can also be found on a physical sticker located on the bottom of the device. This is particularly useful when you need to identify the device before it is powered on or when network access is unavailable. The sticker typically includes both the serial number and, on newer devices, the Netgate Device ID.