rm /etc/hostid /etc/rc.update_hostid
For IT professionals managing multiple firewalls, treat your serial numbers like cryptographic keys.
Store each firewall’s serial number alongside its IP address and admin credentials. This saves hours during outages. pfsense serial number
The serial number is typically visible on the main dashboard once you log in.
If you are running pfSense on official Netgate hardware (e.g., SG-1100, SG-3100, 6100, 4100, 1541, etc.), the serial number is physically burned into the BIOS. This allows the pfSense software to identify the platform automatically, enabling: rm /etc/hostid /etc/rc
: If you have SSH or console access, use the following tools: dmidecode -t system
. While the software itself (pfSense Plus or Community Edition) does not have a "software serial number" in the traditional sense, it uses hardware identifiers and unique tokens for registration and support. Where to Find the Serial Number The serial number is typically visible on the
provides detailed hardware info, including the serial number. SSH Banner
By mastering the pfSense serial number, you take one more step toward becoming a true pfSense power user.