Firewall may refer to:

• Firewall (computing), a technological barrier designed to prevent unauthorized or unwanted communications between computer networks or hosts
• Firewall (construction), a barrier inside a building, designed to limit the spread of fire, heat and structural collapse
• Firewall (engine), the part of a vehicle that separates the engine compartment from the rest of the vehicle
• Firewall (physics), a hypothetical phenomenon where a freely falling observer spontaneously burns up at the horizon of a black hole

Look up firewall in Wiktionary, the free dictionary.

• Alberta Agenda, also known as the Alberta Firewall, a political proposal for the Canadian province
• firewalld, a firewall management tool for Linux operating systems
• Great Firewall, China's internet censorship firewall
• Chinese wall, a zone of non-communication between distinct sections of a business, in order to prevent conflicts of interest
• Personal firewall, a very popular form of firewall designed to protect personal computers
• Reredos, a short wall behind a fire in a traditional hearth
• Wall of Fire (disambiguation)

This disambiguation page lists articles associated with the title Firewall.
If an internal link led you here, you may wish to change the link to point directly to the intended article.