Firewall

Firewall, also Fire Wall, may refer to:
*The enemy ability from Final Fantasy VI.
*The ability from Final Fantasy Type-0.
*The ability from Dissidia Final Fantasy Opera Omnia.
==Etymology==
A firewall is a physical or virtual barrier that is often placed as to control the flow of some thing, as with troops or weapons. In information science, it refers to hardware or software designed to control data traffic and prevent malicious activity from reaching a given network.