OpenBSD

Crontab random. Add support for random values using the '~' operator. For example "0~30" will result in a random value between 0 and 30 inclusive... https://marc.info/?l=openbsd-cvs&m=158691599313802&w=2 #cron

OpenBSD Virtualization in Action OpenBSD VMM have been around for 1-2 years maybe and i decided to try it now. http://dswsis.com/2020/04/12/openbsd-virtualization-in-action/ #virtualisation

WPA2 / 802.11i Wireless Networking on OpenBSD. https://cromwell-intl.com/open-source/openbsd-wireless-wpa2.html #hardware #network

OpenBSD 6.6 BGP Looking Glass https://bgp.guru/2020/04/14/openbsd-6.6-bgp-looking-glass/ #network #bgp

Cute, fast and secure chroots with Jailkit on OpenBSD I recently found a super cool software jailkit, which I updated over at OpenBSD I used to wonder how to properly deploy unpledged/un-unveiled apps on OpenBSD in a nice manner, specifically python/nodejs apps which are known to be shoddily written and insecure beyond measure (I should probably cite something). This cute little beast popped up in my google-fu voyage and helped me set up my chroots in a really awesome manner. https://wiki.epsilonknot.xyz/en/jailkit #chroot #jailkit

We are approaching the 6.7 release. The ports tree is not locked yet, but it's time to slowly take the foot off the pedal and to refrain from far-reaching changes... https://marc.info/?l=openbsd-ports&m=158652906719327&w=2

Setting up an email server in 2020 with OpenSMTPD and Dovecot Another one link... https://prefet.ch/blog/2020/email-server/ #mail #opensmtpd #dovecot

OpenBSD Workstation Guide. https://begriffs.com/posts/2017-05-17-openbsd-workstation-guide.html #desktop

A great desktop experience on OpenBSD with fluxbox. https://ybad.name/Logiciel-libre/OpenBSD/Great_desktop_experience_fluxbox_openbsd.html #desktop #fluxbox

Rethinking openbsd security https://flak.tedunangst.com/post/rethinking-openbsd-security #security

An OpenBSD E-Mail Server Using OpenSMTPD, Dovecot, Rspamd, and RainLoop. This tutorial demonstrates a full-featured email server running on OpenBSD using OpenSMTPD, Dovecot, Rspamd, and RainLoop. OpenSMTPD is the default mail server for OpenBSD. Choose a Vultr Compute Cloud instance with plenty of storage for the expected number of users. https://www.vultr.com/docs/an-openbsd-e-mail-server-using-opensmtpd-dovecot-rspamd-and-rainloop #opensmtpd #mail

Tale of OpenBSD secure memory allocator internals - malloc(3) So, again I started reading OpenBSD source codes with debugger after reducing my sleep timings and managing to get some time after professional life. This time I have picked one of my favourite item from my wishlist to learn and share, that is, OpenBSD malloc(3), secure allocator I will try to keep it as n part series due to lengthy content and this series will be mostly focussed on user-space code of malloc(3) and friends First of all, I would like to thanks Otto Moerbeek, Bryan Steele and Fabien Romano for helping me to understand the malloc(3) internals and cleared all my queries. So, we should start now... :) https://bsdb0y.github.io/blog/deep-dive-into-the-OpenBSD-malloc-and-friends-internals-part-1.html #malloc

OpenBSD's 'spinning' CPU time category. Unix systems have long had a basic breakdown of what your CPU (or CPUs) was spending its time doing. The traditional division is user time, system time, idle time, and 'nice' time (which is user time for tasks that have their scheduling priority lowered through nice(1) or the equivalent), and then often 'interrupt' time, for how much time the system spent in interrupt handling. Some Unixes have added 'iowait', which is traditionally defined as 'the system was idle but one or more processes were waiting for IO to complete'. OpenBSD doesn't have iowait, but current versions have a new time category, 'spinning'... https://utcc.utoronto.ca/~cks/space/blog/unix/OpenBSDCpuSpinTime #cpu #spinning

https://www.youtube.com/watch?v=rDMaH9Fyrkw #video

Booting from an FFS2 filesystem https://undeadly.org/cgi?action=article;sid=20200326083657 #ffs2

pf-badhost is a simple, easy to use badhost blocker that uses the power of the pf firewall to block many of the internet's biggest irritants. https://www.geoghegan.ca/pfbadhost.html #pf #firewall

A privilege separated implementation of WireGuard for OpenBSD. https://github.com/timkuijsten/wiresep #wireguard

Fullstack mailserver based on OpenSMTPD for OpenBSD using ansible https://github.com/AnsiMail/AnsiMail #ansible #opensmtpd

OpenBSD makes life pretty easy when it comes to securing your web-app... http://blog.snailtext.com/posts/berkeley-smorgasbord.html http://blog.snailtext.com/posts/berkeley-smorgasbord-part-2.html

Introduction to doas on OpenBSD. OpenBSD's alternative to sudo is doas, although it does not work the same way as sudo and requires some configuration... https://www.vultr.com/docs/introduction-to-doas-on-openbsd #doas