Re-arm the Chassis Intrusion Switch

The chassis on Netgate 8300 has an intrusion detection function. If the chassis has been opened the intrusion switch will be tripped even if the power was off.


Chassis intrusion switch events and the current status of the sensor can be viewed in the IPMI web interface (Intelligent Platform Management Interface (IPMI)), but the only supported method to re-arm the sensor at this time is via IPMI CLI utilities.


While the intrusion alarm is active the system fans run at a higher fixed speed than normal. Re-arming the intrusion sensor returns the fan to their typical profiled speeds.

Re-arm Using IPMI CLI Utilities

The intrusion switch can be re-armed using ipmitool either locally or over the network.

These commands may be performed from the TNSR CLI (host shell sudo <command>) or a shell prompt (sudo <command>).

The following steps assumine the procedure is being performed locally on the Netgate 8300 from a shell prompt.


To reach a shell prompt in TNSR, use the host shell command.

  • Replace and fasten the chassis cover completely.

  • Install ipmitool and related utilities from apt if they are not already present

    $ sudo apt update
    $ sudo apt install -y ipmitool freeipmi-tools
  • Re-arm chassis intrusion sensor two times:

    $ sudo ipmitool raw 0x04 0x2a 0x04 0x00
    $ sudo ipmitool raw 0x04 0x2a 0x04 0x00
  • Check the Chassis intrusion sensor, it should read a value of 0x0080

    $ sudo ipmitool sensor list | grep -i physical
    Physical Scrty | 0x0 | discrete | 0x0080| na | na | na | na | na | na