Firewall

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firewall is simply a program or hardware device that filters the information coming through the Internet connection into your private network or computer system. If an incoming packet of information is flagged by the filters, it is not allowed through.With a firewall in place, the landscape is much different.

A firewall is a piece of hardware or software that helps prevent malware and maliciousattacks from entering a computer or a network of computers through the Internet. The name firewall comes from the real-world protection that prevents fire from penetrating beyond that point.

Firewalls can either be software or hardware, though it’s best to have both. A software firewall is a program installed on each computer and regulates traffic through port numbers and applications, while a physical firewall is a piece of equipment installed between your network and gateway.

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