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Episode 095: Bitrot Group Therapy


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More BSDCan 2015 videos

OpenBSD httpd rewrite support

  • One of the most-requested features of OpenBSD's new HTTP daemon (in fact, you can hear someone asking about it in the video just above) is rewrite support
  • There were concerns about regex code being too complicated and potentially allowing another attack surface, so that was out
  • Instead, Reyk ported over an implementation of lua pattern matching while on the flight back from BSDCan, turning it into a C API without the lua bindings
  • In the mailing list post, he shows an example of how to use it for redirects and provides the diff if you'd like to give it a try now
  • It's since been committed to -current, so you can try it out with a snapshot too

SSH 2FA on FreeBSD

  • We've discussed different ways to lock down SSH access to your BSD boxes before - use keys instead of passwords, whitelist IPs, or even use two-factor authentication
  • This article serves as a sort of "roundup" on different methods to set up two-factor authentication on FreeBSD
  • It touches on key pairs with a server-side password, google authenticator and a few other variations
  • While the article is focused on FreeBSD, a lot of it can be easily applied to the others too
  • OpenSSH has a great security record, but two-factor authentication is always a good thing to have for the most important systems

NetBSD 7.0-RC1 released

  • NetBSD has just announced the first release candidate for the 7.0 branch, after a long delay since the initial beta (11 months ago)
  • Some of the standout features include: improved KMS/DRM with support for modern GPUs, SMP support on ARM, lots of new ARM boards officially supported, GPT support in the installer, Lua kernel scripting, a multiprocessor USB stack, improvements to NPF (their firewall) and, optionally, Clang 3.6.1
  • They're looking for as much testing as possible, so give it a try and report your findings to the release engineering team

Interview - Sean Chittenden - / @seanchittenden

FreeBSD at Groupon, ZFS

News Roundup

OpenSMTPD and Dovecot

  • We've covered a number of OpenSMTPD mail server guides on the show, each with just a little something different to offer than the last
  • This blog post about it has something not mentioned before: virtual domains and virtual users
  • This means you can easily have "" and "" both go to a local user on the box (or a different third address)
  • It also covers SSL certificates, blocking spam and setting up IMAP access, the usual
  • Now might also be a good time to test out OpenSMTPD 5.7.1-rc1, which we'll cover in more detail when it's released...

OctoPkg, a QT frontend to pkgng

  • A PC-BSD user has begun porting over a graphical package management utility from Arch linux called Octopi
  • Obviously, it needed to be rewritten to use FreeBSD's pkg system instead of pacman
  • There are some basic instructions on how to get it built and running on the github page
  • After some testing, it'll likely make its way to the FreeBSD ports tree
  • Tools like this might make it easier for desktop users (who are used to similar things in Ubuntu or related distros) to switch over

AFL vs. mandoc, a quantitative analysis

  • Ingo Schwarze has written a pretty detailed article about how he and other OpenBSD developers have been fuzzing mandoc with AFL
  • It's meant to be accompanying material to his BSDCan talk, which already covered nine topics
  • mandoc is an interesting example to stress test with fuzzing, since its main job is to take and parse some highly varying input
  • The article breaks down the 45 different bugs that were found, based on their root cause
  • If you're interested in secure coding practices, this'll be a great one to read

OpenZFS conference videos

  • Videos from the second OpenZFS conference have just started to show up
  • The first talk is by, you guessed it, Matt Ahrens
  • In it, he covers some ZFS history, the Oracle takeover, the birth of illumos and OpenZFS, some administration basics and also some upcoming features that are being worked on
  • There are also videos from Nexenta and HGST, talking about how they use and contribute to OpenZFS


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