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This, however, is a very general definition. It can be software, hardware or cloud-based.
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It is responsible for monitoring anything that is attempting to come in or go out, allowing it or preventing it from doing so based on the specifications you have set.
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A firewall is the intelligent gatekeeper posted at the entrances to your applications, databases and networks. Companies cannot completely lock up their security landscape so tightly that unnecessary traffic is prevented from entering and leaving. Threat actors are constantly prowling the perimeters of your computer network in search of a way to infiltrate it for their own destructive reasons.
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