The Book of PF (new edition)

[gotnull]

A quick note for those who don't already know that a new edition(the 4th) of "The Book of PF" is coming, the 3rd edition was 10 years ago.
For now it's only available for pre-order, so we can probably expect an official release soon.
What is nice about it, is the fact that the author has been taken into account the differences between FreeBSD and OpenBSD, so the examples and explanations should apply for both OS, NetBSD is out of the equation because they switched to "npf".

The fourth edition was written to bring the text into sync with the realities of the \
modern Internet, seen from the perspective of someone working with OpenBSD 7.8 or \
FreeBSD 14-RELEASE.

'The Book of PF, 4th edition is now available for preorder' - MARC

That grumpy BSD guy

Field notes and occasional musings by Peter on Stuff that happens, from a free software perspective, mainly OpenBSD, FreeBSD.

bsdly.blogspot.com

The Book of PF, 4th Edition

Build a more secure network with PF.

nostarch.com

 

[SirDice]

the author has been taken into account the differences between FreeBSD and OpenBSD

That's good. Many people don't seem to realize OpenBSD's PF and FreeBSD's PF have diverged quite a bit in the past decade or so since it was first imported.