firewall

A technology which is used by organizations that have linked their enterprise computer systems into the Internet. The firewall prevents users from outside the organization doing anything which would corrupt the system inside. One standard approach uses the firewall to filter out suspicious messages and discard them. Another approach offers a caller a copy of a system so that, if the caller does anything that is malicious, this can be seen before the real system is damaged.

Firewall may refer to:

Firewall (construction), a physical barrier inside a building or vehicle, designed to limit the spread of fire, heat and structural collapse Firewall (networking), a logical barrier designed to prevent unauthorized or unwanted communications between sections of a computer network Firewall (film), a 2006 action film written by Joe Forte, starring Harrison Ford Firewall (novel), a novel by Henning Mankell, featuring Kurt Wallander Chinese wall, a zone of non-communication between distinct sections of a business, in order to prevent possible (and probable) conflict of interest