David Jorm says, a lot of hype today surrounds the word “firewall”; some of this is corporate-fabricated and some of it relates to the actual functionality of a firewall. The commonly purveyed misconception is that a firewall is some sort of magical network security device that will put an end to every admin’s security concerns. This couldn’t be further from the truth; a firewall is designed to provide advanced IP services such as packet filtering, port forwarding, and network address translation. This said, a correctly configured firewall should be a part of every secure network. It’s just not the be-all and end-all of network security. Read more.