That way, malicious traffic is blocked right away before it can harm connected computers. You can compare a firewall to an electric fence that provides extra protection against thieves and other suspicious characters.Ī firewall’s primary purpose is to create a barrier between an internal network and incoming traffic from external sources. This reduces the amount of unwanted traffic and frees up more resources for legitimate data communication to take place. Inbound traffic that does not conform to these rules is rejected. It lets you transmit information freely, but checks any incoming data using security rules you set up. It is typically used with antimalware to prevent unauthorized users from gaining access to your systems. A firewall is a piece of software that adds an extra layer of security to your computer.
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