FOSDEM 2016 is over

I went to FOSDEM 2016 this year with 8 other colleagues of mine and had a really really good time. A lot of good speeches and stuff to talk about and I feel very motivated for some new projects. Some of the stuff going on right now is incredibly exciting, especially with regards to containerization etc which is something I have a lot of personal and work related interest in. I will be looking into more details in that for the future…

What I did miss was a more “general networking” track with low level stuff like iptables, netfilter, iproute, wireshark, snort, etc. I’m just not sure if this is the right conference for that though. Gathering my thoughts and working out some of the project details in the upcoming week if I get time.

SSL certs updated

October 15, 2015 by · 2 Comments
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The SSL certificates where updated on this site and I also switched over to a Comodo certificate from StartSSL as I screwed somethings up due to being tired.

If anyone has any problems with the certificates please let me know by email and I will try to fix it.

Iptables-tutorial and ipsysctl-tutorial on github

I guess I should have done this a long long time ago. Both the iptables-tutorial and the ipsysctl-tutorial source code are now available on github. Many many years ago I had an idea of putting the version control system out there for use, but I never realized it for various reasons. Both these documents are old by today, but the basic information is still valid and will likely be for a long time to come it seems.

I apologize for the version history, I moved from CVS in a rather rude way to SVN without keeping the history, which was what I used back in those days.

I invite anyone and everyone to do edits if they wish to and send me pull requests to fix the issues they find, or to add the documentation they’d like to add.

The iptables tutorial is available at:

The ipsysctl tutorial is available at:

Server move update

February 28, 2014 by · Leave a Comment
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Most of the server move was finished during the last few days and no major interruptions of services where endured as far as I can tell except due to some cock-up with the SSL certificates.

The new server should be able to cope with the rather small loads this site creates.

Moving to new host

February 22, 2014 by · Leave a Comment
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A small update, I will unfortunately be moving to a new host within the upcoming weeks. I’ve been graciously hosted by for the last… many years and I am tremenduously grateful for the excellent help and services I’ve received from them. Unfortunately it looks like they are closing down, and hence I need to find a new home. I’ve found one at for now, we will see how that pans out. During this time there may be some disruptions to services on this webpage and my mail. I will try to keep this down however. For now, I’ve started setting up a server and preparing for the final move.


More server issues and bad links fixed

December 27, 2013 by · Comments Off on More server issues and bad links fixed
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Several more server issues where found which in turn caused the server to DoS’ing itself with disk-io. I’m sorry for the inconvenience, personal life has taken too much time simply.

Also, based on reports from some users, I’ve fixed several bad links in the iptables-tutorial and ipsysctl-tutorial documents. This was caused by an earlier move between servers.

If you find any other issues, let me know!

Server troubles

December 21, 2013 by · Leave a Comment
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Since the server update we’ve experienced several issues causing disruptions and downtimes. We believe that the issue causing the problems have been addressed and that webserver should resume normal operations from now on.

Server update

October 19, 2013 by · Leave a Comment
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The server was updated during the last week thanks to very good friends at The old server had some issues with sporadic crashes causing a some downtime over the last two years, which was the main reason for the update. As a part of the server update, all web content and accesses should be protected using HTTPS from now on, and a lot of backend stuff has changed as well. If you are experiencing any issues with the site, don’t hesitate letting me know about it.

Screenmovie 1.1 released

A quick note that Screenmovie 1.1 has been released. It’s still very crude, but adds some sound recording and the ability to turn it on/off. Postprocessing is not supported yet but should be there in the next version.


  • Record video
  • Record sound
  • Configure file format
  • Configure video codec + settings (5-6 codecs chosen for now)
  • Configure audio codec + settings (2 codecs for now)

I still have some problems, but I just found some info on how to possibly make some problems better at least.


  • Fix some high cpu usage problems
  • Add global keybindings
  • Postprocessing encoding
  • Clean up and add some values specific for codecs (as required).

Regarding web browsers and User Interfaces

March 28, 2010 by · Leave a Comment
Filed under: Development,, Linux, Windows 

I had a discussion this morning with my wife regarding her new computer (Toshiba laptop). A few days back, I was contemplating the possibility to try and get rid of the Windows 7 license it came with the EULA disagreement argument and get my money back, but after much consideration and realizing that her school (Chalmers University) pretty much requires her to run Windows 7 and Office 2007 (all applications used are windows based with Unix/Linux alternatives only irregularly, and her lab professors more or less frowns on vs MS Office formatting problems), we decided to keep it. This is another story, how Chalmers went from being a very open University to a complete clusterfuck of a Microsoft bootcamp and something I’d love to write more about at some point, but not now.

The computer has arrived finally, and my wife had a little time to play around with Windows 7. I’ve personally not used Windows since Win XP and refuse to lay hands on it unless “forced” to at work. Her main gripes came with Internet Explorer 8, and I couldn’t help but laugh very loudly at her assessment of it. It incessantly keeps asking questions and giving hints and ideas like “How do you like this?”, “Did you know that IE plugin blah …?”, “We can help you do …?”, “Do you have herpes?” to the point where the only sane comparison she could make is a very horny and needy drunk boy at a club. It took her less than one battery charge to switch back over to Firefox. My guess is that they simply made the user interface a bit … too helpful, and tried to be too reactive to “possible needs in this context”.

So, on this topic, I thought it could be slightly interesting to see this months statistics and split between different operating systems and web browsers.

Operating systems

I can’t really say that this site is representative of the world in general, but I think it is interesting to see the level of windows users. I’m guessing this is a sign that many of the people visiting are reading about iptables and using linux for servers and firewalls, but aren’t using it as a desktop system (yet?).

Windows 59.1 %
Linux 31.3 %
Macintosh 6.4 %
Unknown 2.7 %

Web browser

Personally, I find this part the most astounding. That IE has gone so low is simply not something I had expected, and how big market share firefox has… incredible.

Firefox 60.7 %
MS Internet Explorer 16.4 %
Safari 11.4 %
Mozilla 4.5 %
Opera 4.1 %
Unknown 1.2 %

I will try to do some more work on this in the future, could be interesting to see this change over time. I know the reliability of my own source isn’t excellent and the error margin is probablythrough the roof, but it should be rather fun to dig in to.

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