How Firewalls Works
A firewall works like a security guard for your network.
Whenever data comes from the internet, the firewall checks — “Is this safe or harmful?”
There are two types shown here:
1️⃣ Perimeter Firewall – Filters traffic coming from the internet.
It checks:
•IP addresses
•Port numbers
•Protocols
•Packet content
If the traffic is safe, it’s allowed in; if not, it’s blocked.
2️⃣ Inner Firewall – Adds another layer of protection inside your network, keeping your internal systems (like workstations and email servers) safe.
In short,
a firewall is a digital gatekeeper that asks every piece of data:
“Who are you? Where are you from? Why do you want to enter?”
✅ Safe traffic gets in — 🚫 unwanted traffic gets stopped.
#CyberSecurity #NetworkSecurity #Firewall #EthicalHacking #InfoSec #fblifestyle
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