#packetfilter

2 weeks ago

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

A story about network metadata and #openbsd, originally from 2014, good for reprising. See The Book of PF for more #nfsen #netflow […]

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2 weeks ago

Friends, is this nxdomain.no/~peter/20260... what a successful campaign looks like?

(also see nxdomain.no/~peter/eight... or for that matter nostarch.com/book-of-pf-4e) @nostarchpress.bsky.social #greyptrapping #spam #spamd #pf #packetfilter #greylisting #email #cybercrime #marketing #scams

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2 weeks ago

Friends, is this nxdomain.no/~peter/20260224_smtp_bla... what a successful campaign looks like?

(also see nxdomain.no/~peter/eighteen_years_of... or for that matter https://nostarch.com/book-of-pf-4e @nostarch #greyptrapping #spam #spamd […]

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The Hail Mary Cloud And The Lessons Learned

3 weeks ago

A mention elsewhere of the insufferable ssh password guessers has me reprise my "The Hail Mary Cloud and the Lessons Learned" nxdomain.no/~peter/hailm... piece #ssh #passwords #passwordguessing #passwordgroping #endlessh #openbsd #freebsd #pf #packetfilter #security #cybercrime

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3 weeks ago

A mention elsewhere of the insufferable ssh password guessers has me reprise my "The Hail Mary Cloud and the Lessons Learned" nxdomain.no/~peter/hailmary_lessons_... piece, with a not added at the end about endlessh as a possible refinement (yes, I use it) #ssh #passwords […]

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1 month ago

The fresh 4th edition of The Book of PF in physical form has reached Europe (Ireland), www.linkedin.com/posts/tomsmythconnect_th... - so my stack of author copies are hopefully on the way too.

The book home page is at […]

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1 month ago

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

2026-03-19 AsiaBSDCob https://www.asiabsdcon.org
2026-06-18 BSDCan https://www.bsdcan.org

See nxdomain.no/~peter/pf_tutorial_upcom... ( […]

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1 month ago

AsiaBSDCon 2026

This year's first "Network Management with the OpenBSD PF Toolset" session will be at AsiaBSDCon 2026 2026.asiabsdcon.org/index.html.en, 2026.asiabsdcon.org/entry/talk/Z...

Also see nxdomain.no/~peter/what_... #asiabsdcon #freebsd #openbsd #pf #packetfilter #networking #conference @nostarch

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pf: make af-to less magical

2 months ago

pf: make af-to less magical undeadly.org/cgi?action=a... #openbsd #pf #packetfilter #ipv6 #ipv4 #afto #addressfamilytranslation #nat64 #networking #current #developement

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pf: make af-to less magical

2 months ago

pf: make af-to less magical undeadly.org/cgi #openbsd #pf #packetfilter #ipv6 #ipv4 #afto #addressfamilytranslation #nat64 #networking #current #developement

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2 months ago

NYC*BUG Jan 2026: Upcoming 4th edition of The Book of PF, CRA and more, Peter Hansteen YouTube video by BSDTV

The recording from NYC*BUG Saturday January 10th, 2026 session "The Book of PF 4th ed + EU CRA: It's time to Engineer up" is now available:
Youtube: youtu.be/HOCsvcCm1Ec
Peertube: toobnix.org/w/bQPtKXKqJM...
#bookofpf #OpenBSD #freebsd #packetfilter #CRA #SBOMS #dependency #supplychain #security

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2 months ago

AsiaBSDCon 2026

There will be a "Network Management with the OpenBSD Packet Filter Toolset" at #AsiaBSDCon in Taipei Thursday, March 19 2026.

Details soon to emerge at 2026.asiabsdcon.org #asiabsdcon #freebsd #openbsd #networking #conference #tutorial #pf #packetfilter #freesofware #libresoftware

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Valuable News – 2025/12/08 The Valuable News weekly series is dedicated to provide summary about news, articles and other interesting stuff mostly but not always related to the UNIX/BSD/Linux systems. Whenever I stumble upon…

3 months ago

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

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Source and state limiters introduced in pf

4 months ago

Source and state limiters introduced in pf www.undeadly.org/cgi?action=a... #openbsd #pf #networking #statelimiters #sourcelimiters #statetracking #packetfilter #security #freesoftware #libressoftware

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4 months ago

Source and state limiters introduced in pf

www.undeadly.org/cgi #openbsd #pf #networking #statelimiters #sourcelimiters #statetracking #packetfilter #security #freesoftware #libressoftware

"This change has our resident packet manglers quite excited […]

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Network Management with the OpenBSD Packet Filter Toolset (T5) EuroBSDCon 2025 The OpenBSD Packet Filter (PF) is at the core of the network management toolset available to professionals working with the OpenBSD and FreeBSD operating systems. Understanding the PF subsystem and the set of networking tools that interact with it is essential to building and maintaining a functional environment. The present session will both teach networking and security principles and provide opportunity for hands-on operation of the extensive network tools available on OpenBSD and FreeBSD in a lab environment. Basic to intermediate understanding of TCP/IP networking is expected and required for this session. Topics covered include The basics of and network design and taking it a bit further Building rulesets Keeping your configurations readable and maintainable Seeing what your traffic is really about with your friend tcpdump(8) Filtering, diversion, redirection, Network Address Translation Handling services that require proxying (ftp-proxy and others) Address tables and daemons that interact with your setup through them The whys and hows of network segmentation, DMZs and other separation techniques Tackling noisy attacks and other pattern recognition and learning tricks Annoying spammers with spamd Basics of and not-so basic traffic shaping Monitoring your traffic Resilience, High Availability with CARP and pfsync Troubleshooting: Discovering and correcting errors and faults (tcpdump is your friend) Your network and its interactions with the Internet at large Common mistakes in internetworking and peering Keeping the old IPv4 world in touch with the new of IPv6 The tutorial is lab centered and fast paced. Time allowing and to the extent necessary, we will cover recent developments in the networking tools and variations between the implementations in the OpenBSD and FreeBSD operating systems. Participants should bring a laptop for the hands on labs part and for note taking. The format of the session will be compact lectures interspersed with hands-on lab excercises based directly on the theory covered in the lecture parts. This session is an evolutionary successor to previous sessions. Slides for the most recent version of the PF tutorial session are up at https://nxdomain.no/~peter/pf_fullday.pdf, to be updated with the present version when the session opens.

5 months ago

We are about five minutes from starting the "Network management with PF" https://events.eurobsdcon.org/2025/talk/FW39CX/ tutorial at #eurobsdcon in #zagreb. Slides at https://nxdomain.no/~peter/pf_fullday.pdf as usual #pf #openbsd #freebsd #packetfilter #networking

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Network Management with the OpenBSD Packet Filter Toolset (T5) EuroBSDCon 2025 The OpenBSD Packet Filter (PF) is at the core of the network management toolset available to professionals working with the OpenBSD and FreeBSD operating systems. Understanding the PF subsystem and t...

5 months ago

Tomorrow 2025-09-25 at 10:30 CEST, the refreshed "Network Management with the OpenBSD Packet Filter Toolset" events.eurobsdcon.org/2025/talk/FW... will start at #eurobsdcon.

Updated slides: online just before we start.

#openbsd #freebsd #pf #packetfilter #networking #firewall #trickery #security

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5 months ago

Tomorrow 2025-09-25 at 10:30 CEST, the refreshed "Network Management with the OpenBSD Packet Filter Toolset" https://events.eurobsdcon.org/2025/talk/FW39CX/ by yours truly, @stucchimax and Tom Smyth will start at #eurobsdcon.

We will put the updated slides online just before the session starts […]

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Network Management with the OpenBSD Packet Filter Toolset (T5) EuroBSDCon 2025 The OpenBSD Packet Filter (PF) is at the core of the network management toolset available to professionals working with the OpenBSD and FreeBSD operating systems. Understanding the PF subsystem and t...

5 months ago

Thursday, September 25, 2025, Tom Smyth and I: "Network Management with the OpenBSD Packet Filter Toolset" tutorial events.eurobsdcon.org/2025/talk/FW... at #eurobsdcon in #zagreb. Register: 2025.eurobsdcon.org/registration... #openbsd #freebsd #networking #pf #packetfilter #security #trickery

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5 months ago

On Thursday, September 25, 2025, Tom Smyth and I will be giving a "Network Management with the OpenBSD Packet Filter Toolset" tutorial https://events.eurobsdcon.org/2025/talk/FW39CX/ at #eurobsdcon in #zagreb. Register: https://2025.eurobsdcon.org/registration.html #openbsd #freebsd #networking […]

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