Posts Tagged »Computer«

Google is talking IPv6 to me.

February 13, 2014 - 3:38 am

We’re getting there!
It has been a while since I started digging into IPv6. My home network is running on IPv6 for a while, but now I’m confident enough to implement it in my productive setup.

My mailserver has now been fully migrated to IPv6 and while doing this I properly implemented TLS (with a CACert signed certificate) including perfect forward secrecy (PFS) and so on.

Here is how servers of major freemail providers are reacting to my new setup.

Provider sending to… receiving from…
IPv6 TLS IPv6 TLS
GMail yes yes yes yes
GMX no yes no yes
web.de no yes no yes
T-Online no yes (no PFS) no yes
Yahoo no broken* (untested) (untested)
live.com/hotmail no no no no
Apple me.com/mac.com no no no no

* Certificate does not match hostname. They are trying to use a wildcard certificate across two levels of subdomains which is forbidden for HTTPS and not explicitely allowed for SMTP.

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Category: Networking  No Comments »

IPv6 and the ignorance of hosters

November 5, 2013 - 3:48 pm

A few weeks ago I received an e-Mail from a German server hosting company.  They told me about their completely renewed product range which now has the best cost-benefit ratio in the world. I remember that I got in contact with them years ago but then decided to rent my server from another provider.

OK, the e-Mail sounded extremely marketing oriented and so does their website.
But since the offerings looked quite reasonable I decided to give them a chance and replied with a list of technical questions.

One of them was about the size of the IPv6 subnet they are going to assign me. I was a bit confused that I couldn’t find anything about IPv6 at all on their website.

The answer came a few days later. I somehow expected it even though I never really believed that a root-server hoster could ever afford this kind of ignorance. But here it is (translated from German):

Indeed we do not YET offer IPv6 but it is already on our road map. This means it will be realized for you in the very near future.

It’s obvious what that means.

I didn’t answer back and haven’t heard from them, either. No, not quite. In fact I received another generated mail informing me that my very special and not transferable offer will only last until end of October. It seems the only thing they really renewed was their marketing department.

I wonder what’s going to happen in the next months and years. I suspect this is not the only provider ignoring IPv6.

Category: Networking  No Comments »

Multimedia presentations with Raspberry Pi

September 29, 2013 - 11:11 pm

I just realized that time has gone so fast and my last technical posting was ages ago.

My german blog readers know that I’m on a sabattical at the moment. I’m working for WEC International UK and support  – among others – the communications department. Today I want to share one of my projects with you.

You probably have heard about Raspberry Pi. A small credit card sized computer developed in UK.
WEC wants to use it for their presentation at exhibitions consisting of a collection previoulsy produced Audio and Video content played in a loop.

It is quite easy to run such presentations on a Raspberry PI. At the moment we use Pi Presents, a set of python scripts created by Ken Thompson which serves all sorts of kiosk computing such as interactive video/image presentation.

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Category: Web  No Comments »

OFS linux magazine articles online

December 22, 2009 - 1:08 am

ofsarticle

Article in english Linux Magazine

As you probably know we wrote an article about OFS for the german Linux Magazin and the english Linux Pro Magazine one year ago.

Both, the german and the english article are now available online.

English: http://www.linuxpromagazine.com/Issues/2009/99/CONNECTIONS/
German: http://www.linux-magazin.de/Heft-Abo/Ausgaben/2009/01/Verbindungssuche

I really recommend reading it if you did not had the possibility to get the magazine.

We wrote about the concepts of OFS and our plans. We went a big step into the right direction, but there is still much work. For example OFS is much more stable today, but we still lack a decent GUI.

Take a look at the articles and share our ideas.

Category: Computer, Linux, Non-technical, OFS, Technical  1 Comment »

Diploma thesis and Master thesis online

May 24, 2009 - 8:54 pm

Eclipse plug-in using EMF compare on GMF models

Yesterday I uploaded my master thesis. It’s about visualization of differences between EMF models. The compare tool for EMF (Eclipse Modelling Framework) models, which is called EMF compare and the GMF (Graphical Modelling Framework) has been utilized for this thesis. I developed a plug-in, which shows differences in a GMF-like manner.

For more information and download, have a look here.

Open-Source offline-filesystem solutions

In my diploma thesis I compared several network-filesystems and evaluated their offline-features. It has been online for a while, but now I moved it to my new website. I haven’t translated it into english language so it’s available in german only.

Download it here (german only)

Category: Computer, GMF Compare, OFS  2 Comments »