Linux Firewalls
by Steve Suehring · first published 2005
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2022–2026first – last mentioned
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Wireguard docs are useful: https://www.wireguard.com/netns/ If you want to RUN a VPN, master iptables and enterprise networking: https://www.amazon.com/Linux-Firewalls-3rd-Steve-Suehring/dp... . If you want to WRITE a VPN, read the source of a few openly available relatively simple VPN/tunnel implementations. https://github.com/yarrick/iodine https://github.com/jpillora/chisel…
on “Ask HN: Books/resources/materials that teach you VPN fundamental?” ↗Linux Firewalls by Steve Suehring covers nftables. It’s a good book to know the basics.
on “The Book of PF, 4th edition” ↗…https://www.digitalocean.com/community/tutorials/how-to-inst... Last but not least No Starch Press overs some nice books like "How Linux Works" or "The Linux Command Line" (if you're not sure about that) or even "Linux Firewalls: Attack Detection and Response" ... You learn most by trying. I'm now heading for the beach to enjoy some offline adventures and will answer questions later if needed.
on “What You Get After Running an SSH Honeypot for 30 Days” ↗