obsdfreqd - userland CPU frequency scheduling for OpenBSD.

https://tildegit.org/solene/obsdfreqd

#cpu #freq

Heap Overflow in OpenBSD's slaacd via Router Advertisement

In this blog post we analyze a heap overflow vulnerability we discovered in the IPv6 stack of OpenBSD, more specifically in its slaacd daemon. This issue, whose root cause can be found in the mishandling of Router Advertisement messages containing a DNSSL option with a malformed domain label, was patched by OpenBSD on March 21, 2022. A proof-of-concept to reproduce the vulnerability is provided.

https://blog.quarkslab.com/heap-overflow-in-openbsds-slaacd-via-router-advertisement.html

#security #network #slaacd

Doing stupid things (with packets and OpenBSD).

Several articles about OpenBSD on server: https://doing-stupid-things.as59645.net/

#system #network #mail

FreeBSD vs OpenBSD: Which is Right for You?

FreeBSD vs OpenBSD. Which is more secure? Which is faster? Which is generally superior? Both have their strengths and weaknesses, and both appeal to different audiences depending on needs.

https://www.ateamsystems.com/tech-blog/freebsd-vs-openbsd-which-is-right-for-you/

#system

pkg - a wraper for OpenBSD's pkg* tools.

https://github.com/qbit/pkg

#packages #pkg

History... (from Twitter).

OpenBSD Gaming Updates Q2 2022.

It's been a little quieter on the subreddit for a while, but that doesn't mean that nothing is happening in OpenBSD gaming! With the final touches being applied before the OpenBSD 7.1 release, this is as good a time as any to give a bit of an overview of recent developments and useful resources...

https://www.reddit.com/r/openbsd_gaming/comments/u5tdzy/openbsd_gaming_updates_q2_2022/

#desktop #games #system

How to talk to a local IPMI under OpenBSD.

Much like Linux, modern versions of OpenBSD are theoretically able to talk to a suitable local IPMI using the standard ipmi(4) kernel driver. This is imprecise although widely understood terminology; in more precise terms, OpenBSD can talk to a machine's BMC (Baseboard Management Controller) that implements the IPMI specification using one of a number of standard interfaces, as covered in the "System Interfaces" section of ipmi(4). However, OpenBSD throws us a curve ball in that the ipmi(4) driver is normally present in the default OpenBSD kernel but not enabled...

https://utcc.utoronto.ca/~cks/space/blog/unix/OpenBSDLocalIPMI

#ipmi #hardware

🐡 OpenBSD 7.1 released. Apr 21, 2022. (52nd OpenBSD release). #release #system

OpenBSD Webzine ISSUE #9

https://webzine.puffy.cafe/issue-9.html

#webzine #news

Let's install OpenBSD/riscv64 on QEMU

I wanted to get in on the OpenBSD/riscv64 bandwagon, but I don't have the money to spend on fancy new hardware. Fortunately, QEMU has RISC-V support. Unfortunately, I could not find any instructions to install OpenBSD on it. We'll just have to figure it out ourselves...

https://briancallahan.net/blog/20220418.html

#install #riscv64 #install

iblock: block scanner TCP connections under OpenBSD.

iblock is a software whose purpose is to detect TCP connections, on specific ports, in order to block the corresponding IP addresses, through Packet Filter...

https://doc.huc.fr.eu.org/en/monitor/iblock-openbsd/

#network

Let's try V on OpenBSD.

A long time ago, I submitted a patch for V. And then I mostly forgot about V. GitHub recently reminded me of its existence. Let's see if V still works on OpenBSD. I am going to build it, see if it is easily able to be made into a port, and then try some of their upstream-developed programs...

https://briancallahan.net/blog/20220426.html

#programming #v

How to contribute to the OpenBSD project?

You like OpenBSD? Then, I'm quite sure you can contribute to it! Let me explain the many ways your skills can be used to improve the project and contribute back.

https://dataswamp.org/~solene/2022-05-03-contributing-to-openbsd.html

#system #contribute

Programming Style Influences.

The point of this post isn't try and persuade you that you should also use OpenBSD's style as an influence, but I wanted to show what the effects of a programming style influence can be. I could equally have talked about how BBC BASIC, Arm 2 assembly, Python, Template Haskell, or many other languages and systems have influenced me, and I think the overall thrust of this post would have been similar...

https://tratt.net/laurie/blog/2022/programming_style_influences.html

#code #programming

PFRE.

PFRE is a packet filter rule editor for OpenBSD/pf. PFRE is expected to be used by beginners and system administrators alike. The UTMFW and PFFW projects use PFRE on their web administration interfaces. If you don't want to install PFRE yourself, you can download the installation files of UTMFW or PFFW to test drive PFRE easily...

https://github.com/sonertari/PFRE

#pf #firewall #network

Own Your Calendar & Contacts With OpenBSD, Baïkal, and FOSS Android.

In this tutorial I explain how I use Baïkal running on OpenBSD to host my own calendar and address book, and how to consume them with FOSS apps on Android. Feel free to skip the introduction if you just want to dive straight into the tutorial, it's just there to provide context for those who are new to these topics...

https://baak6.com/baikal-openbsd-fossdroid/

#caldav #cardav #baikal

🇫🇷 [FR] Installation de pare-feu redondants avec OpenBSD. Tutorial from Matthieu Herb. #video #network