[gspr]

I'd love something similarly scoped centered around nftables. Does anyone have a suggestion? I see No Starch has a Linux Firewall book, but it's from 2008 and is thus iptables-based.

[flipped]

Nftables has a really good doc site https://wiki.nftables.org/wiki-nftables/index.php/Main_Page. I wouldn't rely on any book

[rfmoz]

Linux Firewalls by Steve Suehring covers nftables. It’s a good book to know the basics.