OpenBSD Journal

The OpenBSD Packet Filter (PF) is at the core of the network management toolset available to professionals working with the BSD family of operating systems. Understanding the networking toolset is es...

BLUG - Bergen Linux (and BSD) User Group

EuroBSDCon 2026 Get different formats: curl https://events.eurobsdcon.org/2026/schedule/\?format=table (default) curl https://events.eurobsdcon.org/2026/schedule/\?format=list 2...

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

Embargoes create myth about security fixing. In OpenBSD we have an errata process to provide source and binary patches for stable releases. This requires a mixture of secrecy and fast acting. What ...

This talk will present the current state of the input device "stack" on OpenBSD, and discuss some ideas for upcoming changes in order to get the console, X.Org and Wayland applications the best possib...

Being an avid collector of Sun Microsystems servers, the speaker has a few Sun2 machines from around 1983. The 2/50 can only netboot but it doesn't use NFS as that had not been invented yet. But surel...

NetBSD has had a good test suite for its native syscalls for a long time. Linux also has a test suite for its native syscalls. NetBSD is capable of running Linux binaries by providing syscall emulatio...

STUNMESH-go is an open-source tool that enables direct peer-to-peer WireGuard connections between devices behind NAT or CGNAT. It multiplexes STUN and WireGuard traffic on the same UDP port by interac...

Compared to C-lineage languages and associated build systems and mechanisms, many later languages starting with Perl have incorporated packaging systems for their own ecosystems. Language-based packag...

In this talk, we describe our current work in progress on supporting hibernate on FreeBSD. First, we outline the different high-level steps that are necessary. Then, we delve into how we actually impl...

A challenge when setting up VPNs is the proper modification of the routing table. This is needed, so that all traffic goes through the VPN interface and is encrypted, except the encrypted traffic gen...

This talk shares our experience in designing and deploying a FreeBSD-based platform that provides a runtime environment for EDA (electronic design automation) software. This project is supported by ME...

IT infrastructure is becoming ever more complex. To serve a simple modern web application we need orchestrators, containers, server side renderers and a bunch of 3. party tools and services. And this ...

The ARM platform is revolutionary in its flexibility and overall quality of NOT having to be compatible with a 1980 PC. Modern ARM64 systems stand out for offering high-performance, high core counts, ...

Sylve is the new FreeBSD Foundation sponsored VM and jail manager for FreeBSD. In this tutorial I will cover - Prerequisites - Installation and set up - Creating and managing jails - Creating and us...

### An Introduction to the Filesystems and Networking ### in the FreeBSD Open-Source Operating System Dr. Marshall Kirk McKusick Author and Consultant **Who Should Take this Course** This course p...

The OpenBSD Packet Filter (PF) is at the core of the network management toolset available to professionals working with the BSD family of operating systems. Understanding the networking toolset is es...

Learn what the EU Cyber Resilience Act is and what it means for you. Then, deep dive into SBOMs and discover how to choose the right tools for dependency management. The European Union Cyber Resilie...

The bhyve hypervisor recently gained the ability to add or remove emulated PCI devices to a running virtual machine [1]. This talk will showcase the key design and implementation details that went int...

rcd(8) is a new service manager that has been carefully designed for FreeBSD, bringing modern features such as service monitoring, parallelization, socket activation and more while being fully backwar...

Working as an incident response engineer i often encounter the "worst case scenario" where no part of the breached infrastructure can be trusted. The incident response has to be swift and yet, the rec...

GEFS is a crash-safe, snapshotting, corruption-detecting, simple, and reasonably fast file system. It's built on a write-optimized data structure known as a Bε tree. Originally developed for Plan 9, ...

Shell scripts have a bad reputation when it comes to usability and eye candy. Modern users find a blinking cursor on a a black screen leaves a lot to be desired when having to interact with a shell sc...

In 1972, Ken Thompson added a script to Version 2 AT&T UNIX: "locate and run off a particular section of this manual". This tool, "man", closed the loop for computer system documentation, allowing it ...

Base system packages, or pkgbase for short is the FreeBSD initiative to move the operating system binaries from large binary archives to individual packages using the FreeBSD package manager, pkg(8). ...

OpenNTPD hit the tree in 2004, so we're celebrating its 20th birthday (a few milliseconds late). - motivation - state of time sync back then - initial design & implementation - reception: a misunderst...

Cloud-init is the de facto standard for initial instance configuration across many cloud environments. However, its implementation is heavily Linux-centric and does not map cleanly to native FreeBSD V...

Today's security landscape is terrifyingly different from what we enjoyed a year ago. How does FreeBSD help keep us secure in this new and uncertain time? What's the pipeline from patch -> patched wi...

The FreeBSD Ports Collection is one of the largest third-party software repositories in the open-source world. According to Repology, it ranks in the top four in terms of the number of packages, maint...

It was the night of 10 March 2021, and I had only just fallen asleep. A notification woke me. Then another, then another. Different servers, different workloads, but all with one thing in common: the ...

Earlier this year I conducted a performance investigation and tuning of a slow backup job. Essentially, a single rsync syncing a deeply nested directory tree with thousands of files over the network o...

Who's going to save the world from AI's insatiable energy use? You are. Take a whirlwind tour of AI's energy and resource use with Anne Currie, author of Building Green Software, the Green Software M...

This half-day workshop provides an introduction to the Game of Trees version control system. Game of Trees (Got) is a version control system which prioritizes ease of use and simplicity over flexibil...