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|Originally Published: Tuesday, 22 August 2000||Author: Alexander Reelsen|
|Published to: news_enhance_security/Security News||Page: 1/1 - [Printable]|
Firewalls - Overview
[SP]A firewall is generally a separator and protector between one thing and another. Traditionally used in building to help contain fires and prevent their rapid spread, the modern firewall is a computer running software allowing it to filter information passing through. A firewall can work at several layers of the network - at the highest level, application, and at the lowest usually the datalink layer (MAC hardware address).