Small and medium businesses have a variety of open-source tools and free software available to keep PCs and networks safe without breaking the bank. Business Center reports that these options can be every bit as effective as expensive security software and service, and offers tips on how to get the most from open-source and free tools.
“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.”