How do authorities use firewalls and other tools for internet control?
A firewall is like a security guard for your computer or a network. It watches the data that comes in and goes out and decides whether to allow it or block it based on a set of security rules. In principle, a firewall on your own devices isn’t a bad thing. It can help protect your system from cyber criminals and other threats by keeping unwanted or harmful data out or specific data in.

