Set up a firewall in 2 minutes on Arch Linux

Install the ufw iptables-nft wrapper with:

# pacman -Sy ufw

Enable and start it with:

# systemctl enable ufw
# systemctl start ufw

Configure it. By default, block all incoming connections and allow all outgoing. This is what you typically want:

# ufw default allow outgoing
# ufw default deny incoming
# ufw reload

Done!

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