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)
References in periodicals archive ?
By organization type, the global SMS Firewall Market is segmented into small and midsized enterprises and large enterprises.
Step 4: Continual policy monitoring--Don't forget that maintaining an effective, efficient and correct firewall policy is an ongoing process.
A firewall continuously monitors the data packets being transmitted in the network.
"In the case of an SMB or a mid-size organisation then probably they might need to replace existing firewalls and IPS.
The manual administration of firewalls is hurting the purse strings!
[13] proposed a system known as the FIREwall Modeling and Analysis (FIREMAN), which applies static analysis techniques to check for misconfigurations or policy anomalies in distributed firewalls as well as in individual firewalls.
Ideal for use by SMBs, remote or branch offices, and telecommuters, the ProSafe Wireless VPN Firewalls block unwanted users from accessing the network.
US LEC provides a broad array of complementary services, including conferencing, data backup and recovery, data center services and Web hosting, as well as managed firewall and router services for advanced data networking.
Click on Next and type in the IP address of the VPN server you wish to connect to (this should be the external IP address of the computer or firewall assigned by your ISP).
NetContinuum has unveiled the next generation NC-1100 Web Application Firewall (NC-1100 AF) and the Application Gateway (NC-11 00 AG).
David Hucaby's CISCO ASA AND PIX FIREWALL HANDBOOK (1587051583, $60.00) provides a thorough coverage for the msot common features of the popular Cisco firewall security solutions.
New managed firewall services have been introduced by Internet Security Systems (ISS) (NASDAQ:ISSX), a managed security services company.