Ashgrove Veterinary Clinic's network: on the inside a reception PC, a vet's laptop, a card reader and an X-ray system; a firewall gate on the boundary blocks uninvited traffic from the internet — a port scan, remote-desktop guessing and unknown visitors — lets the clinic's own requests out with their replies back, and opens one deliberate door for the booking site.

CY-BEGINNER-095Beginner · Network Security

The Gatekeeper — How a Firewall Protects Your Network

Your network has an inside and an outside, and the firewall is the gate between them. Keep it closed by default, open only the few things you genuinely need, and it blocks the uninvited from the internet while still letting your own devices reach out. Not a mystery box — a gatekeeper on your boundary.

11 hours8 chapters32 lessons225 activities8 labs

What you'll learn

See your network as an inside, an outside, and a boundary between — with the firewall as the gate on that line.
Block the uninvited by default and open only what you genuinely need, kept narrow and reviewed.
Understand that blocking incoming still lets your own devices reach out to the internet normally.
Know a firewall is one layer, not all of security — and see through 'we've got a firewall' and 'just open it up'.

Price:৳5,000