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Thursday, July 19, 2012

Firewall

We can define that a firewall is a part of a computer system or network that is designed to block unauthorized access while permitting authorized communications. So it is a device or set of devices configured to permit, deny, encrypt, decrypt, or proxy the in and out computer traffic between defined different security domains based upon a set of rules and other criteria .

Normally the firewall machine is configured with a set of rules that determine which network traffic will be allowed to pass and which will be blocked or refused. However we can see that, If the network is too large, firewall located inside their corporate network to segregate sensitive areas from other employees.

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