Firewall may refer to:

  • Firewall (construction), a barrier inside a building or vehicle, designed to limit the spread of fire, heat and structural collapse
    • Firewall (automobile), the part of the vehicle that separates the engine from the driver and passengers
  • Firewall (computing), a technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts

It may also refer to;

  • Lange (musician), also known as Firewall, the alias of Stuart Langelaan
  • Firewall (film), a 2006 thriller film written by Joe Forte, starring Harrison Ford
  • Firewall (Henning Mankell novel), a novel by Henning Mankell, featuring Kurt Wallander
  • Firewall (Andy McNab novel), a Nick Stone adventure
  • Firewall (G.I. Joe), a fictional character in the G.I. Joe universe
  • Firewall, a song by Steve Vai off his Real Illusions: Reflections album
  • Chinese wall, a zone of non-communication between distinct sections of a business, in order to prevent conflicts of interest
  • Great Firewall, China's internet censorship firewall
  • The Alberta Agenda, also known as the Alberta Firewall, a political proposal for the Canadian province
  • An episode of the computer animated series ReBoot titled Firewall.
  • A wall inside a kiln, made from fire brick or other refractory furniture that reflects flames from a burner .