IT Security: The Essential Guide to Firewalls

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What you need to know about this frontline network-security technology.

by John Edwards

Firewalls play a central role in IT security, standing between enterprise networks and the outside world to protect computers, applications and other resources from external attack.

While there are several types of firewalls, the technology can be broadly defined as a collection of related security programs that are stored on a network gateway server and collectively safeguard network assets from users on other networks.

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