====== OPNsense ======

===== ZFS-Snapshots ======

  * Create a new Snapshot with the name ''known-good''
  * Upgrade Firmware
  * Reboot and test
  * OPNsense works as expected:
    * Remove the known-good Snapshot and keep using the default Snapshot
  * OPNsense has issues:
    * Activate the ''known-good'' Snapshot either in the WebGUI or the Boot Menu
  * After rebooting, remove the bad ''default'' Snapshot
    * Rename the ''known-good'' Snapshot back to ''default''