FIREBRICK-MIB

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Organization: Observium Limited

Last Updated: 2015-07-10

Description: FIREBRICK-MIB module

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

What Is FIREBRICK-MIB?

FIREBRICK-MIB is an unofficial, community-maintained SNMP module for Firebrick multi-WAN routers/VPN concentrators (a UK-based networking vendor), created specifically for use with the Observium network monitoring platform rather than shipped by Firebrick itself. It exposes hardware sensor readings alongside protocol-level state for VPN tunneling and BGP routing sessions. The module is explicitly built for hardware health monitoring — voltage rails, internal temperature, and fan speed sensors — so operators can catch impending power-supply or cooling failures before they cause an outage. It also tracks the operational lifecycle of L2TP tunnels and sessions (free, opening, live, closing, failed, closed), reflecting the software/service health of the VPN termination function, and exposes BGP-related objects for routing protocol status. Because it layers vendor-specific sensor and tunnel objects on top of standard SNMP conventions and reuses BGP naming patterns reminiscent of BGP4-MIB, it is typically deployed on small-to-medium business or ISP-edge Firebrick appliances polled by Observium or similar open-source monitoring tools. Engineers can download the FIREBRICK-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in FIREBRICK-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Firebrick router/VPN appliance

Monitoring Examples

An admin would poll fbSensorTemperature and fbSensorVoltage under fbSensorObjects to catch overheating or power-rail sag before the unit resets, and fbSensorFanspeed to detect a failing fan. Under fbL2tpObjects, watching fbL2tpTunnelsFailed and fbL2tpTunnelsClosing climb while fbL2tpTunnelsLive drops would indicate a VPN concentrator problem affecting remote-access users. fbL2tpSessionsWaiting building up without draining suggests session establishment is stalled, e.g. due to authentication or resource exhaustion.

What Can Be Monitored

sensor voltage
sensor temperature
fan speed
L2TP tunnel counts by state
L2TP session counts by state
BGP session objects

Imported Objects

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
enterprises

From SNMPv2-TC

DisplayString
TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using fbSensorVoltage OID:

Select a Firebrick multi-WAN router/VPN concentrator (unofficial Observium MIB) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type fbSensorVoltage into the Find box to locate it in the OID tree, then select it and click OK. It reports the firebrick voltage sensors. Reported in thousandths of a volt. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the value drifts significantly from its normal baseline, since an unexpected change often points to a real underlying issue. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
firebrick	1.3.6.1.4.1.24693			Unofficial Firebrick MIB. For Observium use only.
fbSensorObjects	1.3.6.1.4.1.24693.1
INT fbSensorVoltageEx	1.3.6.1.4.1.24693.1.1	INTEGER	read-only	Firebrick voltage sensors. Reported in thousandths of a volt.
INT fbSensorTemperature	1.3.6.1.4.1.24693.1.2	INTEGER	read-only	Firebrick temperature sensors. Reported in thousandths of a degree celsius.
INT fbSensorFanspeed	1.3.6.1.4.1.24693.1.3	INTEGER	read-only	Firebrick fanspeed sensors. Reported in RPM.
fbBgpObjects	1.3.6.1.4.1.24693.179
fbL2tpObjects	1.3.6.1.4.1.24693.1701
fbL2tpTunnelStats	1.3.6.1.4.1.24693.1701.1
INT fbL2tpTunnelsFree	1.3.6.1.4.1.24693.1701.1.0	INTEGER	read-only	Number of tunnels in FREE state.
INT fbL2tpTunnelsOpening	1.3.6.1.4.1.24693.1701.1.1	INTEGER	read-only	Number of tunnels in OPENING state.
INT fbL2tpTunnelsLive	1.3.6.1.4.1.24693.1701.1.2	INTEGER	read-only	Number of tunnels in LIVE state.
INT fbL2tpTunnelsClosing	1.3.6.1.4.1.24693.1701.1.3	INTEGER	read-only	Number of tunnels in CLOSING state.
INT fbL2tpTunnelsFailed	1.3.6.1.4.1.24693.1701.1.4	INTEGER	read-only	Number of tunnels in FAILED state.
INT fbL2tpTunnelsClosed	1.3.6.1.4.1.24693.1701.1.5	INTEGER	read-only	Number of tunnels in FREE state.
fbL2tpSessionStats	1.3.6.1.4.1.24693.1701.2
INT fbL2tpSessionsFree	1.3.6.1.4.1.24693.1701.2.0	INTEGER	read-only	Number of sessions in FREE state.
INT fbL2tpSessionsWaiting	1.3.6.1.4.1.24693.1701.2.1	INTEGER	read-only	Number of sessions in WAITING state.
INT fbL2tpSessionsOpening	1.3.6.1.4.1.24693.1701.2.2	INTEGER	read-only	Number of sessions in FREE state.
INT fbL2tpSessionsNegotiating	1.3.6.1.4.1.24693.1701.2.3	INTEGER	read-only	Number of sessions in NEGOTIATING state.
INT fbL2tpSessionsAuthPending	1.3.6.1.4.1.24693.1701.2.4	INTEGER	read-only	Number of sessions in AUTH-PENDING state.
INT fbL2tpSessionsStarted	1.3.6.1.4.1.24693.1701.2.5	INTEGER	read-only	Number of sessions in STARTED state.
INT fbL2tpSessionsLive	1.3.6.1.4.1.24693.1701.2.6	INTEGER	read-only	Number of sessions in LIVE state.
INT fbL2tpSessionsAcctPending	1.3.6.1.4.1.24693.1701.2.7	INTEGER	read-only	Number of sessions in ACCT-PENDING state.
INT fbL2tpSessionsClosing	1.3.6.1.4.1.24693.1701.2.8	INTEGER	read-only	Number of sessions in CLOSING state.
INT fbL2tpSessionsClosed	1.3.6.1.4.1.24693.1701.2.9	INTEGER	read-only	Number of sessions in CLOSED state.

RFC description

Unofficial Firebrick MIB for monitoring sensor data, L2TP tunnel statistics, and BGP operations on Firebrick routers.

Start monitoring Firebrick multi-WAN router/VPN concentrator (unofficial Observium MIB) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download FIREBRICK-MIB