A network firewall works by establishing a border between the internet and the network it guards. It is inserted inline across a network connection and inspects all packets entering the network. As it inspects, a rules engine distinguishes between traffic that is benign and traffic that is potentially dangerous.
A firewall is not capable of making judgments on its own -- no computer is. Instead, it follows the programmed rules created by humans. These rules dictate whether the firewall should let a packet through the network barrier. If a packet matches a pattern that indicates danger, the corresponding rule will instruct the firewall not to let the packet through. These rules have to be constantly updated because the criteria for what patterns indicate a dangerous packet change frequently.
Read more : what is a network firewall and how does it work
A firewall is not capable of making judgments on its own -- no computer is. Instead, it follows the programmed rules created by humans. These rules dictate whether the firewall should let a packet through the network barrier. If a packet matches a pattern that indicates danger, the corresponding rule will instruct the firewall not to let the packet through. These rules have to be constantly updated because the criteria for what patterns indicate a dangerous packet change frequently.
Read more : what is a network firewall and how does it work
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