A new BSDCan video has been posted:

A packet's journey through pf By Kristof Provost

https://youtu.be/JtSg6ylDALo

A walkthrough of a packet's journey through (FreeBSD's) pf, concentrating on the big picture and its implications.

We'll cover when packets are inspected, when rules are evaluated and how states are used. Along the way we'll cover what DTrace probes can show us, what some of pfctl's counters mean and just how many times pf can look at a single packet.

This talk is intended for firewall admins looking for a deeper understanding and aspiring pf developers. It is not a "How to use pf" talk.

#pf #runbsd #freebsd

A new BSDCan video has been posted:

A packet's journey through pf By Kristof Provost

https://youtu.be/JtSg6ylDALo

A walkthrough of a packet's journey through (FreeBSD's) pf, concentrating on the big picture and its implications.

We'll cover when packets are inspected, when rules are evaluated and how states are used. Along the way we'll cover what DTrace probes can show us, what some of pfctl's counters mean and just how many times pf can look at a single packet.

This talk is intended for firewall admins looking for a deeper understanding and aspiring pf developers. It is not a "How to use pf" talk.

#pf #runbsd #freebsd

Yes, The Book of PF, 4th Edition Is Coming Soon https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html (also tracked https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html) #openbsd #freebsd #bookofpf #pf #packetfilter #book #networking #security #freesoftware #libresoftware #shamelessplug

Yes, The Book of PF, 4th Edition Is Coming Soon https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html (also tracked https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html) #openbsd #freebsd #bookofpf #pf #packetfilter #book #networking #security #freesoftware #libresoftware #shamelessplug

The long version of why you need key authentication for your SSH servers - "The Hail Mary Cloud and the lessons learned" https://nxdomain.no/~peter/hailmary_lessons_learned.html #ssh #passwordgroping #unix #linux #openbsd #freebsd #pf #packetfilter

Also The 4th edition of the Book of PF is coming soon: https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html

The long version of why you need key authentication for your SSH servers - "The Hail Mary Cloud and the lessons learned" https://nxdomain.no/~peter/hailmary_lessons_learned.html #ssh #passwordgroping #unix #linux #openbsd #freebsd #pf #packetfilter

Also The 4th edition of the Book of PF is coming soon: https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html

We are still working on The Book of PF, 4th ed.

Preorders are open at https://nostarch.com/book-of-pf-4th-edition, read about the work at https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html (also tracked at https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html) #bookofpf #newedition #freebsdd #openbsd #pf #packetfilter #networking #security #freesoftware #libresoftware

We are still working on The Book of PF, 4th ed.

Preorders are open at https://nostarch.com/book-of-pf-4th-edition, read about the work at https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html (also tracked at https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html) #bookofpf #newedition #freebsdd #openbsd #pf #packetfilter #networking #security #freesoftware #libresoftware

At EuroBSDCon 2025 in Zagreb: "Network Management with the OpenBSD Packet Filter Toolset" by Peter N. M. Hansteen, Tom Smyth, Max Stucchi, see https://events.eurobsdcon.org/2025/talk/FW39CX/

Schedule at https://events.eurobsdcon.org/2025/schedule/

To register https://2025.eurobsdcon.org/registration.html

#eurobsdcon #freebsd #openbsd #networking #packetfilter #pf #security #devops #sysadmin

At EuroBSDCon 2025 in Zagreb: "Network Management with the OpenBSD Packet Filter Toolset" by Peter N. M. Hansteen, Tom Smyth, Max Stucchi, see https://events.eurobsdcon.org/2025/talk/FW39CX/

Schedule at https://events.eurobsdcon.org/2025/schedule/

To register https://2025.eurobsdcon.org/registration.html

#eurobsdcon #freebsd #openbsd #networking #packetfilter #pf #security #devops #sysadmin

oh, my "Yes, The Book of PF, 4th Edition Is Coming Soon" blog post https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html is on hackernews: https://news.ycombinator.com/item?id=44657803#bookofpf #pf #packetfilter #openbsd #freebsd #networking (non-tracked: https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html)

oh, my "Yes, The Book of PF, 4th Edition Is Coming Soon" blog post https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html is on hackernews: https://news.ycombinator.com/item?id=44657803#bookofpf #pf #packetfilter #openbsd #freebsd #networking (non-tracked: https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html)

Today, early access reader feedback for The Book of PF, 4th edition proved to me that early access is worth doing.

Get yours at https://nostarch.com/book-of-pf-4th-edition, or read about the work at https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html#bookofpf #newedition #freebsdd #openbsd #pf #packetfilter #networking #security #freesoftware #libresoftware

Today, early access reader feedback for The Book of PF, 4th edition proved to me that early access is worth doing.

Get yours at https://nostarch.com/book-of-pf-4th-edition, or read about the work at https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html#bookofpf #newedition #freebsdd #openbsd #pf #packetfilter #networking #security #freesoftware #libresoftware

Fellow network nerds, at EuroBSDcon 2025 in Zagreb, there will be a Network Management with the OpenBSD Packet Filter Toolset" https://events.eurobsdcon.org/2025/talk/FW39CX/ session, a full day tutorial starting at 2025-09-25 10:30 CET. You can register for the conference and tutorial by following the links from the conference Registration and Prices https://2025.eurobsdcon.org/registration.html page. #openbsd #freebsd #networking #security #eurobsdcon #conference #pf #packetfilter #freesoftware #libresoftware #zagreb

Fellow network nerds, at EuroBSDcon 2025 in Zagreb, there will be a Network Management with the OpenBSD Packet Filter Toolset" https://events.eurobsdcon.org/2025/talk/FW39CX/ session, a full day tutorial starting at 2025-09-25 10:30 CET. You can register for the conference and tutorial by following the links from the conference Registration and Prices https://2025.eurobsdcon.org/registration.html page. #openbsd #freebsd #networking #security #eurobsdcon #conference #pf #packetfilter #freesoftware #libresoftware #zagreb

Yes, The Book of PF, 4th Edition Is Coming Soon https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html

Long rumored and eagerly anticipated by some, the fourth edition of The Book of PF is now available for preorder https://nostarch.com/book-of-pf-4th-edition #openbsd #pf #packetfilter #freebsd #networking #security #tcpip #ipv6 #ipv4#bookofpf