firewall

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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 ?
Political scientists at the University of Toronto have built their own system, called Psiphon, which allows people to evade national Internet firewalls using only a web browser.
Every ``inappropriate'' em ail was deleted and new internet firewalls have been put in place to prevent non work related messages from outside the force getting to officers.
The hackers - who unveiled their plans at the H2K2 conference in the US - claim their software enables the ordinary Net user to bypasses national Internet firewalls which allow only partial access to global computer networks.
The collection includes the complete unabridged versions of 'TCP/IP Network Administration, 3rd Edition', 'DNS & Bind, 4th Edition', 'Building Internet Firewalls, 2nd Edition', 'SSH, The Secure Shell: The Definitive Guide', 'Network Troubleshooting Tools', 'Managing NFS & NIS, 2nd Edition' and 'Essential SNMP'.
Among the many fine information security books available--several of which have been reviewed in this column--Building Internet Firewalls is one of the best.
On the Cuban side, authorities have set up Internet firewalls to close a loophole many foreigners, and some locals with access to the Web, were using to call out on Web sites offering cheap international phone calls.
Building Internet Firewalls, second edition (ISBN: 1-56592-871-7, $44.95), by Elizabeth D.
See e.g., Table of Contents of InfoWorld (7/15/96); see also Pace, et al., "Internet Firewalls: It's Between You and Them," 18 InfoWorld 70 (7/29/96).
It also has information of SPF, the Sender Policy Framework, incremental zone transfer, forward zones, Ipv6 forward and reverse mapping, transaction signatures, ENUM, architecture for an organization, IDN, and revised DNS Security Extensions, and more on NOTIFY, securing nameservers, and dealing with internet firewalls. The section on accommodating Active Directory with BIND has been revised.
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