SharpTutor

Firewall

How a Network Firewall Works
Interactive network security demonstration

How a Network Firewall Works

Watch network packets travel from the Internet towards a private network. The firewall checks each packet against its rules, permits trusted traffic and rejects traffic that is unsafe or not authorised.

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Allowed packet Blocked packet Packet awaiting inspection

Live packet inspection

Firewall ready Waiting for the next network packet.
0 Packets checked
0 Allowed
0 Blocked
July 2026
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8–12 minutes