firewall


Also found in: Dictionary, Thesaurus, Legal, Financial, Acronyms, Encyclopedia, Wikipedia.
Related to firewall: Windows Firewall

fire·wall

(fīr'wawl)
1. A special building material that is placed in walls between buildings or rooms to prevent the spread of fire.
2. A software program designed to prevent unauthorized persons from accessing a computer system.

firewall

A set of programs that protects the resources of a private computer network from users of other networks. It screens the messages that attempt to enter or leave the network and permits or denies access to outside users based on pre-programmed rules.
References in periodicals archive ?
Since IPSec VPN traffic encrypts all the original packet information, including source and destination address and application type, the firewall cannot apply any filtering.
Since last year the Board has been engaged in a comprehensive review of the twenty-eight firewalls it erected in the late 1980s, and the Board has recently proposed to eliminate a majority of those restrictions.
With Digex managed firewalls solutions, clients receive the industry's most proven firewall solution, complete with high levels of scalability, ease of implementation, user satisfaction, availability and support.