Security on a Shoestring Budget
Protect the Perimeter
A firewall is a de facto requirement for any network security implementation. The firewall is the gatekeeper of the network--blocking unauthorized traffic from entering your internal network, and restricting the flow of traffic in and out of your network based on the rules you establish. Think of it as locking down the "perimeter" of your home or office network.The link for this article located at PC World is no longer available.