firewall

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firewall

Computing a computer system that isolates another computer from the internet in order to prevent unauthorized access

firewall

[′fī‚wȯl]
(computer science)
Hardware and software programs that protect the resources of a private network from users in other networks, controlling all traffic according to a predefined access policy.

firewall

firewall
A noninflammable partition separating the whole or a portion of an engine nacelle from the rest of the aircraft to prevent the spread of fire. Each separated area is called a fire zone and often has its own fire detectors and extinguishers. When a firewall separates the entire engine from the rest of the aircraft, it is often called a fireproof bulkhead.

firewall

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firewall

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firewall

The primary method for keeping a computer secure from intruders. A firewall allows or blocks traffic into and out of a private network or the user's computer. Firewalls are widely used to give users secure access to the Internet as well as to separate a company's public Web server from its internal network. Firewalls are also used to keep internal network segments secure; for example, the accounting network might be vulnerable to snooping from within the enterprise.

In the home, a personal firewall typically comes with or is installed in the user's computer (see Windows Firewall). Personal firewalls may also detect outbound traffic to guard against spyware, which could be sending your surfing habits to a website. They alert you when software makes an outbound request for the first time (see spyware).

In the organization, a firewall can be a stand-alone machine (see firewall appliance) or software in a router or server. It can be as simple as a single router that filters out unwanted packets, or it may comprise a combination of routers and servers each performing some type of firewall processing. For more about the various firewall techniques, see firewall methods.


An Excellent Resource
O'Reilly's "Building Internet Firewalls, 2nd Edition" by Zwicky, Cooper and Chapman is one of the best books written on Internet and Web security. It covers a huge range of firewall and related topics and should be a "must have" for anyone interested in the subject. (O'Reilly & Associates, Inc., 2000, ISBN 1-56592-871-7)
References in periodicals archive ?
Chinese Wall was recorded in London and produced by Phil Collins.
10) Th is discussion summarizes the article by Luk et alia (1997) on the conservation of two Chinese wall painting fragments.
He proudly showed his guests the Chinese wall coverings in his dining room which were donated by the Victoria & Albert Museum while Lord Carrington was NATO Secretary General.
In theory, there is an impenetrable Chinese Wall between the two to prevent privileged, inside information from leaking.
Reversing, the Iowa Supreme Court held that a law firm's implementing a Chinese wall is insufficient to prevent the disclosure of confidential information.
Often when physicians are asked to take positions with hospitals, it's to bridge the Chinese wall between doctors and administrators.
It is easy to forget that it has been fifty years since Jarrell's essay "The Age of Criticism" (1952), in which he worries that "there is an atmosphere or environment, at some of the higher levels of our literary culture, in which many people find it almost impossible not to write criticism and almost impossible to write anything else," and bemoans that fact that many contemporary critics "have a language and style as institutionalized as those of sociologists," indeed a "strange sort of Law French which the critic can now set up like a Chinese wall between himself and the lay (i.
Displays include enormous Chinese wall paintings, 14 large Buddhist sculptures dating from the 12th to 16th centuries, rare works of jade and weapons.
Rogers's solution was to breach traditional rules and create her own Chinese wall.
Among the items to go was a red Chinese wall panel, measuring 12ft x 5ft, with a gold phoenix and dragon design.
At the time, he said he would bring down the Chinese wall between editorial and business, with "a bazooka if necessary.

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