#bookofpf — Public Fediverse posts

At BSDCan 2026: Full day Network Management with the Packet Filter Toolset on OpenBSD and FreeBSD https://www.bsdcan.org/2026/timetable/timetable-Network-Management-with.html

To register: https://www.bsdcan.org/2026/registration.html

See https://nxdomain.no/~peter/pf_tutorial_upcoming_questions_welcome.html (https://bsdly.blogspot.com/2025/05/for-upcoming-pf-tutorials-we-welcome.html)
and https://nxdomain.no/~peter/what_is_bsd_come_to_a_conference_to_find_out.html (https://bsdly.blogspot.com/2025/11/what-is-bsd-come-to-conference-to-find.html)
plus https://nostarch.com/book-of-pf-4e

#pf #packetfilter #bookofpf #networking @nostarch @bsdcan

At BSDCan 2026: Full day Network Management with the Packet Filter Toolset on OpenBSD and FreeBSD https://www.bsdcan.org/2026/timetable/timetable-Network-Management-with.html

To register: https://www.bsdcan.org/2026/registration.html

See https://nxdomain.no/~peter/pf_tutorial_upcoming_questions_welcome.html (https://bsdly.blogspot.com/2025/05/for-upcoming-pf-tutorials-we-welcome.html)
and https://nxdomain.no/~peter/what_is_bsd_come_to_a_conference_to_find_out.html (https://bsdly.blogspot.com/2025/11/what-is-bsd-come-to-conference-to-find.html)
plus https://nostarch.com/book-of-pf-4e

#pf #packetfilter #bookofpf #networking @nostarch @bsdcan

At BSDCan 2026: Full day Network Management with the Packet Filter Toolset on OpenBSD and FreeBSD https://www.bsdcan.org/2026/timetable/timetable-Network-Management-with.html

To register: https://www.bsdcan.org/2026/registration.html

See https://nxdomain.no/~peter/pf_tutorial_upcoming_questions_welcome.html (https://bsdly.blogspot.com/2025/05/for-upcoming-pf-tutorials-we-welcome.html)
and https://nxdomain.no/~peter/what_is_bsd_come_to_a_conference_to_find_out.html (https://bsdly.blogspot.com/2025/11/what-is-bsd-come-to-conference-to-find.html)
plus https://nostarch.com/book-of-pf-4e

#pf #packetfilter #bookofpf #networking @nostarch @bsdcan

At BSDCan 2026: Full day Network Management with the Packet Filter Toolset on OpenBSD and FreeBSD https://www.bsdcan.org/2026/timetable/timetable-Network-Management-with.html

To register: https://www.bsdcan.org/2026/registration.html

See https://nxdomain.no/~peter/pf_tutorial_upcoming_questions_welcome.html (https://bsdly.blogspot.com/2025/05/for-upcoming-pf-tutorials-we-welcome.html)
and https://nxdomain.no/~peter/what_is_bsd_come_to_a_conference_to_find_out.html (https://bsdly.blogspot.com/2025/11/what-is-bsd-come-to-conference-to-find.html)
plus https://nostarch.com/book-of-pf-4e

#pf #packetfilter #bookofpf #networking @nostarch @bsdcan

At BSDCan 2026: Full day Network Management with the Packet Filter Toolset on OpenBSD and FreeBSD https://www.bsdcan.org/2026/timetable/timetable-Network-Management-with.html

To register: https://www.bsdcan.org/2026/registration.html

See https://nxdomain.no/~peter/pf_tutorial_upcoming_questions_welcome.html (https://bsdly.blogspot.com/2025/05/for-upcoming-pf-tutorials-we-welcome.html)
and https://nxdomain.no/~peter/what_is_bsd_come_to_a_conference_to_find_out.html (https://bsdly.blogspot.com/2025/11/what-is-bsd-come-to-conference-to-find.html)
plus https://nostarch.com/book-of-pf-4e

#pf #packetfilter #bookofpf #networking @nostarch @bsdcan

[Repost for the morning (CEST) crowd]

Friends, I wrote a book. It's now out in its fourth edition.

More in "The Book of PF, 4th Edition: It's Here, It's Real" https://nxdomain.no/~peter/its_real_its_here.html

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

Get the book: https://nostarch.com/book-of-pf-4e

@nostarch #bookofpf #pf #networking #openbsd #freebsd #networktrickery #cybersecurity

[Repost for the morning (CEST) crowd]

Friends, I wrote a book. It's now out in its fourth edition.

More in "The Book of PF, 4th Edition: It's Here, It's Real" https://nxdomain.no/~peter/its_real_its_here.html

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

Get the book: https://nostarch.com/book-of-pf-4e

@nostarch #bookofpf #pf #networking #openbsd #freebsd #networktrickery #cybersecurity

[Repost for the morning (CEST) crowd]

Friends, I wrote a book. It's now out in its fourth edition.

More in "The Book of PF, 4th Edition: It's Here, It's Real" https://nxdomain.no/~peter/its_real_its_here.html

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

Get the book: https://nostarch.com/book-of-pf-4e

@nostarch #bookofpf #pf #networking #openbsd #freebsd #networktrickery #cybersecurity

[Repost for the morning (CEST) crowd]

Friends, I wrote a book. It's now out in its fourth edition.

More in "The Book of PF, 4th Edition: It's Here, It's Real" https://nxdomain.no/~peter/its_real_its_here.html

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

Get the book: https://nostarch.com/book-of-pf-4e

@nostarch #bookofpf #pf #networking #openbsd #freebsd #networktrickery #cybersecurity

In case you missed it earlier,

The Book of PF, 4th Edition: It's Here, It's Real https://nxdomain.no/~peter/its_real_its_here.html

And I will have copies with me to upcoming events #openbsd #freebsd #bsd #pf #packetfilter #bookofpf #4thedition #asiabsdcon #bsdcan #eurobsdcon @nostarch

The Book of PF, 4th Edition: It's Here, It's Real https://nxdomain.no/~peter/its_real_its_here.html - now that I have physical copies, I'll bring some to the upcoming conferences such as #asiabsdcon #bsdcan #eurobsdcon #freebsd #openbsd #pf #packetfilter #networking #networktrickery #freesoftware #libresoftware #bookofpf @EuroBSDCon @nostarch

Yes, You Too Can Be An Evil Network Overlord - On The Cheap With OpenBSD, pflow And nfsen https://nxdomain.no/~peter/yes_you_too_can_be_an_evil_network_verlord.html

A story about network metadata and #openbsd, originally from 2014, good for reprising. See The Book of PF for more #nfsen #netflow #pflow #monitoring #networking #security #pf #packetfilter #bookofPF @nostarch

Yes, You Too Can Be An Evil Network Overlord - On The Cheap With OpenBSD, pflow And nfsen https://nxdomain.no/~peter/yes_you_too_can_be_an_evil_network_verlord.html

A story about network metadata and #openbsd, originally from 2014, good for reprising. See The Book of PF for more #nfsen #netflow #pflow #monitoring #networking #security #pf #packetfilter #bookofPF @nostarch

Yes, You Too Can Be An Evil Network Overlord - On The Cheap With OpenBSD, pflow And nfsen https://nxdomain.no/~peter/yes_you_too_can_be_an_evil_network_verlord.html

A story about network metadata and #openbsd, originally from 2014, good for reprising. See The Book of PF for more #nfsen #netflow #pflow #monitoring #networking #security #pf #packetfilter #bookofPF @nostarch

Yes, You Too Can Be An Evil Network Overlord - On The Cheap With OpenBSD, pflow And nfsen https://nxdomain.no/~peter/yes_you_too_can_be_an_evil_network_verlord.html

A story about network metadata and #openbsd, originally from 2014, good for reprising. See The Book of PF for more #nfsen #netflow #pflow #monitoring #networking #security #pf #packetfilter #bookofPF @nostarch

Yes, You Too Can Be An Evil Network Overlord - On The Cheap With OpenBSD, pflow And nfsen https://nxdomain.no/~peter/yes_you_too_can_be_an_evil_network_verlord.html

A story about network metadata and #openbsd, originally from 2014, good for reprising. See The Book of PF for more #nfsen #netflow #pflow #monitoring #networking #security #pf #packetfilter #bookofPF @nostarch

The fresh 4th edition of The Book of PF in physical form has reached Europe (Ireland), https://www.linkedin.com/posts/tomsmythconnect_thebookofpf-openbsd-packetfilter-activity-7427686906349555713-7s4w - so my stack of author copies are hopefully on the way too.

The book home page is at https://nostarch.com/book-of-pf-4th-edition

Some background https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html @nostarch #bookofpf #openbsd #freebsd #pf #packetfilter #networking #security

The latest Valuable News by @vermaden https://vermaden.wordpress.com/2026/02/09/valuable-news-2026-02-09/ notes that The Book of PF, 4th edition https://nostarch.com/book-of-pf-4th-edition has been released #bookofpf #openbsd #freebsd #networking #pf @nostarch

Upcoming "Network Management with the OpenBSD Packet Filter Toolset" tutorials (covering #freebsd and #openbsd):

2026-03-19 AsiaBSDCon (Taipei, TW) https://www.asiabsdcon.org
2026-06-18 BSDCan (Ottawa, CA) https://www.bsdcan.org

See https://nxdomain.no/~peter/pf_tutorial_upcoming_questions_welcome.html (https://bsdly.blogspot.com/2025/05/for-upcoming-pf-tutorials-we-welcome.html)
and https://nxdomain.no/~peter/what_is_bsd_come_to_a_conference_to_find_out.html (https://bsdly.blogspot.com/2025/11/what-is-bsd-come-to-conference-to-find.html)
plus https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html (https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html)

#pf #packetfilter #bookofpf #networking @nostarch

acquired - tome of pf

(this is not sponsored content, I just like the book)

thank you @pitrh

https://nostarch.com/book-of-pf-4th-edition

#unix_surrealism #comic #technomage #openbsd #pf #bookofpf

Oh, I suppose I have been slacking and not telling you that if you order The Book of PF, 4th ed https://nostarch.com/book-of-pf-4th-edition now, you will get the *final version* ebook (print is still in progress) #bookofpf #openbsd #freebsd #networking #firewalls #pf #networktrickery #freesoftware #libresoftware @nostarch

Also see https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html

Again for the evening (CET) crowd:

The recording from NYC*BUG (Properly pronounced "Nice Bug") Saturday January 10th, 2026 session "The Book of PF 4th ed + EU CRA: It's time to Engineer up" is now available:

Youtube: https://youtu.be/HOCsvcCm1Ec
Peertube: https://toobnix.org/w/bQPtKXKqJMdeYDbzhrrkEa

#bookofpf #OpenBSD #freebsd #packetfilter #EUCRA #CRA #SBOMS #dependency #supplychain #security @nostarch

Again for the evening (CET) crowd:

The recording from NYC*BUG (Properly pronounced "Nice Bug") Saturday January 10th, 2026 session "The Book of PF 4th ed + EU CRA: It's time to Engineer up" is now available:

Youtube: https://youtu.be/HOCsvcCm1Ec
Peertube: https://toobnix.org/w/bQPtKXKqJMdeYDbzhrrkEa

#bookofpf #OpenBSD #freebsd #packetfilter #EUCRA #CRA #SBOMS #dependency #supplychain #security @nostarch

Again for the evening (CET) crowd:

The recording from NYC*BUG (Properly pronounced "Nice Bug") Saturday January 10th, 2026 session "The Book of PF 4th ed + EU CRA: It's time to Engineer up" is now available:

Youtube: https://youtu.be/HOCsvcCm1Ec
Peertube: https://toobnix.org/w/bQPtKXKqJMdeYDbzhrrkEa

#bookofpf #OpenBSD #freebsd #packetfilter #EUCRA #CRA #SBOMS #dependency #supplychain #security @nostarch

Again for the evening (CET) crowd:

The recording from NYC*BUG (Properly pronounced "Nice Bug") Saturday January 10th, 2026 session "The Book of PF 4th ed + EU CRA: It's time to Engineer up" is now available:

Youtube: https://youtu.be/HOCsvcCm1Ec
Peertube: https://toobnix.org/w/bQPtKXKqJMdeYDbzhrrkEa

#bookofpf #OpenBSD #freebsd #packetfilter #EUCRA #CRA #SBOMS #dependency #supplychain #security @nostarch

Again for the evening (CET) crowd:

The recording from NYC*BUG (Properly pronounced "Nice Bug") Saturday January 10th, 2026 session "The Book of PF 4th ed + EU CRA: It's time to Engineer up" is now available:

Youtube: https://youtu.be/HOCsvcCm1Ec
Peertube: https://toobnix.org/w/bQPtKXKqJMdeYDbzhrrkEa

#bookofpf #OpenBSD #freebsd #packetfilter #EUCRA #CRA #SBOMS #dependency #supplychain #security @nostarch

Friends, at the end of a horrible year, please let's talk about something *nice*.

My EUR 0.02: You Have Installed OpenBSD. Now For The Daily Tasks. https://nxdomain.no/~peter/openbsd_installed_now_for_the_daily_tasks.html (tracked https://bsdly.blogspot.com/2024/09/you-have-installed-openbsd-now-for.html)

Bonus track: Yes, The Book of PF, 4th Edition Is Coming Soon https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html (tracked https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html)

#freesoftware #openbsd #freebsd #bookofpf #networking #security #deveops #development #sysadmin @nostarch

Why 451 is Good for You - Greylisting Perspectives From the Early Noughties https://nxdomain.no/~peter/why_451_is_good.html (tracked https://bsdly.blogspot.com/2025/12/why-451-is-good-for-you-greylisting.html) @nostarch #greytrapping #greylisting #smtp #email #spam #antispam #bookofpf

Why 451 is Good for You - Greylisting Perspectives From the Early Noughties https://nxdomain.no/~peter/why_451_is_good.html (tracked https://bsdly.blogspot.com/2025/12/why-451-is-good-for-you-greylisting.html) @nostarch #greytrapping #greylisting #smtp #email #spam #antispam #bookofpf

Why 451 is Good for You - Greylisting Perspectives From the Early Noughties https://nxdomain.no/~peter/why_451_is_good.html (tracked https://bsdly.blogspot.com/2025/12/why-451-is-good-for-you-greylisting.html) @nostarch #greytrapping #greylisting #smtp #email #spam #antispam #bookofpf

Why 451 is Good for You - Greylisting Perspectives From the Early Noughties https://nxdomain.no/~peter/why_451_is_good.html (tracked https://bsdly.blogspot.com/2025/12/why-451-is-good-for-you-greylisting.html) @nostarch #greytrapping #greylisting #smtp #email #spam #antispam #bookofpf

Why 451 is Good for You - Greylisting Perspectives From the Early Noughties https://nxdomain.no/~peter/why_451_is_good.html (tracked https://bsdly.blogspot.com/2025/12/why-451-is-good-for-you-greylisting.html) @nostarch #greytrapping #greylisting #smtp #email #spam #antispam #bookofpf

The latest Valuable News by @vermaden https://vermaden.wordpress.com/2025/12/08/valuable-news-2025-12-08/ notes that The Book of PF, 4th edition is coming soon (also https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html, https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html) @nostarch #freebsd #openbsd #pf #packetfilter #bookofpf #4thedition

Long rumored and eagerly anticipated by some, the fourth edition of The Book of PF is now available for preorder

More: https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html (https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html), https://nostarch.com/book-of-pf-4th-edition @nostarch #openbsd #freebsd #pf #networking #bookofpf #freesoftware #firewalls

The actual printing has started, I hear

@gumnos @stefano For a bit of my writing that is not necessarily about spamd (but still mostly with an #openbsd and other #opensource theme), there is my "Short reading list" https://nxdomain.no/~peter/the_short_reading_list.html which is close to what I came up with for some #bookofpf promo material that @nostarch were putting together earlier this year.

And I should add -

* we are making final tweaks to labs and slides still
* we will be covering #FreeBSD 14 as well as #OpenBSD, with labs supporting both.

You could see the session as a Book of PF, 4th edition preview, however physical copies will not yet be available at the conference, see https://nxdomain.no/~peter/yes_the_book_of_pf_4th_ed_is_coming.html (also https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html) #bookofpf

My upcoming book, The Book of PF 4th edition, is part of B&N’s pre-order sale Sept 3–5! Use code PREORDER25 for 25% off (35% for Premium members).

https://www.barnesandnoble.com/w/the-book-of-pf-4th-edition-peter-nm-hansteen/1147997310?ean=9781718504707

#bookofpf #bnpreorder #openbsd #freebsd #pf #packetfilter #networking #security #nostarch #barnesandnoble

"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 https://bsdly.blogspot.com/2025/07/yes-book-of-pf-4th-edition-is-coming.html), title still true, actual publication date TBD, #bookofpf #pf #packetfilter #openbsd #freebsd #networking #security #trickery #hacking

The latest BSD Weekly https://bsdweekly.com/issues/245 features "Eighteen Years of Greytrapping ..." (https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html and https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html - a warmup to #bookofpf 4th ed https://nostarch.com/book-of-pf-4th-edition) #openbsd #freebsd #security #mail #spam #hacking #cybercrime @nostarch

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 @nostarch

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

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

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

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

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