In Memoriam Paul Schenkeveld 1963-2015

A few years ago, I was informed that Paul Schenkeveld had passed away. That was very unpleasant news ofcourse. I knew Paul for some years, at the D-BUG or NLUUG BSD days he was one of the organisers and I was one of the speakers back then. In addition he was one of the main organisers of the 2011 EuroBSDCon in Maarssen. I always saw Paul.. and then Cor.. or the other way around. ...

February 24, 2019 Modified: November 24, 2019 134 words 1 min

Reponse zones in BIND (RPZ/Blocking unwanted traffic).

A while ago, my dear colleague Mattijs came with an interesting option in BIND. Response zones. One can create custom “zones” and enforce a policy on that. I never worked with it before, so I had no clue at all what to expect from it. Mattijs told me how to configure it (see below for an example) and offered to slave his RPZ policy-domains. All of a sudden I was no longer getting a lot of ADS/SPAM and other things. It was filtered. Wow! ...

FreeBSD: Using Open-Xchange on FreeBSD

If you go looking for a usable webmail application, then you might end up with Open-Xchange (OX for short). Some larger ISP’s are using OX as their webmail application for customers. It has a multitude of options available, using multiple email accounts, caldav/carddav included (not externally (yet?)) etc. There are commercial options available for these ISP’s, but also for smaller resellers etc. But, there is also the community edition available. Which is the installation you can run for free on your machine(s). It does not have some of the fancy modules that large setups need and require, and some updates might follow a bit later which are more directly delivered to paying customers, but it is very complete and usable. ...

The epic spam battle from SpamAssassin (10 + year user) to rspamd.

For many System Administrators that have public facing Mailservers, it is an ongoing battle.. SPAM. Since there is money to make, it will never ever go away, but we can try to mitigate this. Introduction on my usage of anti-spam products For many moons I have used the SpamAssassin product in various forms, simply as a client to check every email on delivery, as daemon where multiple servers check one instance, as part of MailScanner where a single (replicated) database was responsible for storing all bits and pieces combined with local additional rules. This worked fine for years, but, our external MX servers are not the most powerful machines in the world. We need to be selective on what we load on them. And the ever increasing spam battle just makes sure that your memory and processing power is going faster then the system(s) could continuously deliver.More rules, more Anti-Virus, more regular expressions, more downloading, parsing and re2c’ing files that gets harder and harder for the systems every time the amount of rules etc increases. ...

FreeBSD Dutch Documentation Project

So. It had been a while before I had proper time to look into the Dutch translation efforts again. History Due to various reasons not discussed here, I was not able to see to a proper translation. Rene did a lot of work (thank you for that Rene!). The PO system First of all, i am going to discuss a bit about the PO system, which is a gettext way of doing translations. It chops texts into msgstr’s (message strings) and then translates those strings using msgid’s. Same lines are translated the same, this might be a good option, unless the context changed between the lines and then you might get ‘google translate’ kind of ways. ...

March 22, 2017 Modified: March 22, 2017 591 words 3 min

Kobo readers using the internet

So I have this situation, where I couldn’t get my kobo reader to connect to the internet and fetch updates and/or use kobo+ for example. I started debugging with Ubiquiti ages ago to see where the problem lies. In the meantime I was unable to continue with this, but I had an interesting thought yesterday. I sniffed the traffic from the hardware (mac) address of the ereader and noticed that it tried to resolve: http://www.msftncsi.com and fetch /ncsi.txt. The site is a microsoft network connection information page that informs microsoft systems whether or not an active internet connection is seen. ...

March 22, 2017 Modified: March 22, 2017 379 words 2 min

Happy 2017!

After ‘relaunching’ my Blog I have been occupied with other activities. So I just took a little time to say “Happy 2017” to all of you. Perhaps there will be more entries this upcoming year.. 🙂

January 4, 2017 Modified: January 4, 2017 36 words 1 min

Reorganised and back online

It took a gentle while to get the blog back up and running. I first considered cleaning out the original blog, but that would have taken a lot of time and effort. So instead I just vaporised the old blog (well, not really, but the interwebs can no longer access it), and decided to rebuild the website. Please feel welcome here, if I feel up for it, I might convert a few older blog entries from the old blog to this new one. Do not expect periodic updates, they will not happen probably. ...

November 22, 2016 Modified: November 22, 2016 93 words 1 min

About my blogs

Back in 2003 I wrote the first bits of the site that you are visiting now. As an homage to that time I added a screenshot from the internet archive for future reference. This will be back at some point.