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Showing posts older than #162 · Back to latest

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Post #159 955
Notes and automation pertaining to my home internet appliance (PCEngines/coreboot/OpenBSD/Ansible). The router is built almost entirely of PCEngines components, running coreboot and OpenBSD, with all modifications to the base install immutable by way of Ansible....

https://github.com/martinbaillie/homebrew-openbsd-pcengines-router

#hardware
Post #158 787
rpki-client is a FREE, easy-to-use implementation of the Resource Public Key Infrastructure (RPKI) for Relying Parties (RP) to facilitate validation of the Route Origin of a BGP announcement. The program queries the RPKI repository system and outputs Validated ROA Payloads in the configuration format of OpenBGPD, BIRD, and also as CSV or JSON objects for consumption by other routing stacks.

https://www.rpki-client.org/

#network #bgp #rpki
Post #153 744
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
Post #146 644
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
Post #145 556
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
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