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What is Packet Filtering? | Simple Firewall Concept Explained
Packet Filtering is the most basic function of a firewall. It decides whether to allow or block network packets based on: Source & destination IP address Port number (like 80 for HTTP, 443 for HTTPS) Protocol (TCP, UDP, ICMP) Think of it like a bouncer at a club, checking each guest’s ID before letting them in. Only packets that match the ...
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