Optionsbleed: Don’t get your panties in a wad

You’re a paranoid schizophrenic if you think optionsbleed affects you in any meaningful way beyond what you should have already been aware of, unless you run systems with multiple tenants that upload their own crap to document roots and you’ll happily serve as-is, yet pretend to provide your customers with security; this is a use-after-free… Continue reading Optionsbleed: Don’t get your panties in a wad

Kolab Now Really Beta (DevOps Edition)

This week, I accidentally made Kolab Now Beta really beta — though pre-alpha more than beta, strictly speaking — completely intentionally; Oops, I #devops'ed https://t.co/zp9ncO0w1k — Kolab Operations (@kolabops) September 5, 2017 I can now proudly announce it runs off of otherwise public GIT source repositories directly, and the developers working on the projects involved… Continue reading Kolab Now Really Beta (DevOps Edition)

Performance Testing w/ Fedora Help(*2)

In the next couple of weeks or so, we’ll be executing performance testing of Kolab on OpenPower in one of the world’s largest testing facilities. How do we do this? With help of Fedora(^2). Part I: The Data Set A good performance test requires a good data set. In the particular set of tests, we… Continue reading Performance Testing w/ Fedora Help(*2)

Kolab for Open Power

Among a variety of deliberations concerning the security and transparency of a little Kolab thing running anywhere — at home, rented space or hybrid cloud — this post is about the transparency of the hardware layer, and our ongoing efforts to make that so. We have said what, why and how on LWN, at events… Continue reading Kolab for Open Power

Kolab Now: Grey Listing Applied

Aside from other anti-spam measures, we have applied a concept known as grey listing. Here’s a summary of how grey listing works: When an email delivery attempt is made, we know the sending server’s IP address, the sender address, and the recipient address. If this is a previously unseen combination of facts, the delivery attempt… Continue reading Kolab Now: Grey Listing Applied

Kolab Now: Another Round of Updates

This weekend has seen a variety of systems being issued either of, or combination of, the following commands; yum -y update yum –enablerepo=kolab-16-updates-testing -y update puppet agent -t –no-noop reboot rm -f /dev/null; mknod -m 666 /dev/null c 1 3 I don’t expect everyone to know and understand what these pieces mean, so I’ll divide… Continue reading Kolab Now: Another Round of Updates

Purposefully Not the Center of Attention

While it’s been argued before, over and over again, that the concepts behind a crypto-currency like BitCoin or Ethereum or Ripple or LiteCoin might mean the upheaval of the traditional economy, it’s also been argued that it is actually the underlying blockchain technology that implies the change of pace. I disagree. One can arguably not… Continue reading Purposefully Not the Center of Attention