Lesson 8 of 13 · Local network
Firewalls — stateful filtering, nftables, zones and DMZ
Objective
Write a Linux firewall that lets through only what is needed, both for the machine itself (input) and for the traffic it routes (forward), and organize the network into zones with a DMZ for servers exposed to the Internet.
This lesson is part of the full course
Unlock Networking and VPN: From IP Addressing to WireGuard, OpenVPN and IPsec Tunnels to read every lesson, do the exercises, access the simulations and earn your certificate.
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