You are running pfSense CE on non-Netgate hardware (e.g., Protectli, Dell Optiplex, Supermicro, or a VM).
In pfSense, a "serial number" typically refers to the physical hardware's identification rather than a software license key. How you find it depends on whether you are using official Netgate hardware or a custom "white box" build. 1. Finding the Serial Number via WebGUI
Depending on your access level, you can find the serial number through several methods: System serial number | Netgate Forum
As of 2025, pfSense CE remains serial-free. But Netgate has hinted at a system for CE that would generate an anonymous, non-unique installation ID (not a serial). For now, if you want the power of a serial number—support, auto-backup, and factory restore—you buy Netgate metal. pfsense serial number
Connect your console cable to the pfSense device and open your terminal emulator at . Reboot the pfSense device. Watch the scrolling text during the boot sequence.
Re-enter the serial number in your BIOS (if you know it) or accept that pfSense will generate a software-based UID instead.
If your system doesn't show a traditional serial number, it will show a Netgate Device ID (NDI) You are running pfSense CE on non-Netgate hardware (e
Outside of device identification, the term "serial number" appears in other areas of pfSense configuration. One notable instance is in the DNS resolver (Unbound), where zone configurations have a "Serial Number" field that must be incremented for changes to propagate to secondary DNS servers. This is a standard DNS zone file serial number and is unrelated to the hardware or system identifier discussed above. The term also appears in the context of Certificate Revocation Lists (CRLs), where certificates are internally tracked by their serial numbers.
If SNMP is enabled, the serial is often found in: NET-SNMP-AGENT-MIB::nsAssetID
On Desktop/Wall-Mount Appliances (e.g., Netgate 1100, 2100, 4200) For now, if you want the power of
The quickest way is to log into your pfSense web interface.
To prove ownership and check warranty status.
You are running pfSense CE on non-Netgate hardware (e.g., Protectli, Dell Optiplex, Supermicro, or a VM).
In pfSense, a "serial number" typically refers to the physical hardware's identification rather than a software license key. How you find it depends on whether you are using official Netgate hardware or a custom "white box" build. 1. Finding the Serial Number via WebGUI
Depending on your access level, you can find the serial number through several methods: System serial number | Netgate Forum
As of 2025, pfSense CE remains serial-free. But Netgate has hinted at a system for CE that would generate an anonymous, non-unique installation ID (not a serial). For now, if you want the power of a serial number—support, auto-backup, and factory restore—you buy Netgate metal.
Connect your console cable to the pfSense device and open your terminal emulator at . Reboot the pfSense device. Watch the scrolling text during the boot sequence.
Re-enter the serial number in your BIOS (if you know it) or accept that pfSense will generate a software-based UID instead.
If your system doesn't show a traditional serial number, it will show a Netgate Device ID (NDI)
Outside of device identification, the term "serial number" appears in other areas of pfSense configuration. One notable instance is in the DNS resolver (Unbound), where zone configurations have a "Serial Number" field that must be incremented for changes to propagate to secondary DNS servers. This is a standard DNS zone file serial number and is unrelated to the hardware or system identifier discussed above. The term also appears in the context of Certificate Revocation Lists (CRLs), where certificates are internally tracked by their serial numbers.
If SNMP is enabled, the serial is often found in: NET-SNMP-AGENT-MIB::nsAssetID
On Desktop/Wall-Mount Appliances (e.g., Netgate 1100, 2100, 4200)
The quickest way is to log into your pfSense web interface.
To prove ownership and check warranty status.
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