What is a firewall?

A firewall is a security system that regulates traffic into and out of a network. It can be used to block unauthorized entry from outsiders or to block insiders from accessing unauthorized content.

How does a firewall work?

Firewalls typically block or allow traffic based on the application being used and the device’s range of ports. A firewall can block specific programs or only allow a program to utilize certain ports to connect to the internet.

A firewall can be a security measure or a means of censorship or both, depending on the intention of the administrator.

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