firewalling

/F AY1 R W AO0 L IH0 NG/
verb
  1. 1

    To protect with a firewall.

  2. 2

    To block with a firewall.

  3. 3

    (motor vehicles or aircraft) To use maximum acceleration.

Source: https://en.wiktionary.org/wiki/firewall, https://en.wiktionary.org/wiki/firewalling