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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.