firewall


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Related to firewall: Windows Firewall

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 ?
Separating VPN and firewall functions can also lead to organizational problems.
I will also discuss the final changes the Board made last year to the revenue test that the Board uses to determine compliance with section 20 of the Glass-Steagall Act and to firewalls regarding cross-marketing between a bank and a securities affiliate, and officer, director, and employee interlocks between two such companies.
The Barracuda Spam Firewall is available in six models and supports from 1,000 to 30,000 active users with no per user licensing fees.
While previous releases of the Barracuda Spyware Firewall included application-blocking for popular IM, media, and other services with simple checkboxes, the latest version of the Barracuda Spyware Firewall now allows the list of application-blocking options to be updated via Energize Updates.
Barracuda Networks is the leading provider of enterprise-class spam firewall solutions for comprehensive email protection.
In response to customer concerns, many of the larger vendors such as Microsoft, Cisco and Check Point have developed and are now strongly pushing firewalls with application filtering capabilities.
We are thrilled that the Barracuda Spyware Firewall received this distinguished award from such an esteemed publication.
As part of Sunbelt's commitment to providing affordable best of breed security tools, the retail price of the full edition of the Sunbelt Kerio Personal Firewall will be reduced to $19.
The Kerio Personal Firewall will be re-branded on an interim basis as the "Sunbelt Kerio Personal Firewall".
The Barracuda Spyware Firewall is capable of detecting the Sony software and will notify the system administrator who can then take the appropriate corrective actions to restore the infected PCs.
Following the success of the Barracuda Spam Firewall 800, we are taking email protection for large enterprises one step further with the Barracuda Spam Firewall 900," said Dean Drako, president and CEO of Barracuda Networks.
Agnitum, a leading developer of personal and corporate information security software, today announces the release of Outpost Firewall Pro 3.