The Sunbelt Kerio Personal Firewall helps you control how your computer exchanges data with other computers on the Internet or local network. Even if you have a router that has a built-in firewall, you will still benefit from using Sunbelt Kerio Personal Firewall on your PC(s). It's the principle of "belt-and-suspenders" (being double-safe) which is a strongly recommended strategy to deal with these 'Internet Bad Guys'. The Sunbelt Kerio Personal Firewall also protects your PC from attacks initiated by other PC's on your network that might have been compromised.
Kerio Personal Firewall is a necessity for all desktop computers connected to broadband Internet, using DSL, cable, ISDN, WiFi or satellite modems. Within an organization, Kerio Personal Firewall prevents a single computer from attacks initiated by internal users. Remote workstations and laptops running KPF are protected from Internet born attacks. And if you have a notebook PC, you definitely should use the Sunbelt Kerio Personal Firewall on that notebook as well. Notebooks are especially easy to compromise because of built-in wireless access.