Yes, the Book of PF, fourth edition is coming soon (bsdly.blogspot.com)

PF: Packet Filtering (Open BSD Firewall). Saved you a click there.

I wish there was a "book of nftables" or something like that.

I’ll toss this out there: pf ruined all other firewalls for me. Once you’ve been spoiled by pf.conf, it’s awfully hard to look at any other without running away screaming. Seriously, it’s a joy, like discovering Python after you’ve learned Brainfuck.

I wish Linux’s firewalls were so easy to configure. The closest I’ve found there is with ufw, which isn’t nearly so comprehensive or straightforward, but at least goes in the right direction.

Also worth checking out Michael W Lucas' books:

* https://mwl.io/nonfiction

I've heard (but not read) good things about his fictional works as well, e.g., $ git commit murder:

* https://mwl.io/fiction/crime#gcm

* https://mwl.io/fiction

Basic question: Is PF related to ebpf by any chance?

Don't know if it's allowed here, but I'm selling my PC Engines APU2 if anyone is interested :)

It has OpnSense installed, but you can install anything you want

4GB RAM, 16GB ssd, wifi

https://www.facebook.com/marketplace/item/4038077093121720