Jens’ BLOG

A lot of people ask “Why should I start learning about IPv6 right now?” Well just take a look at this counter:

Here is another of those myths: If I start using IPv6 I have to abandon IPv4.

Wrong! You can easily use IPv6 and IPv4 at the same time. I fact you should run them at the same time or you want have much to see on the internet right now.

In 2009 I’ll be speaking at several conferences. As you might notice from the titles these talks will be in German. Here are the first two:

• GUUG Frühjahrsfachgepräch vom 10.3.-13.3.2009 in Karlsruhe, Tutorial zu Linux im Netzwerk und Vortrag zu QoS
• Open Source Data Center Conference – OSDC 29+30. April in Nürnberg, Vortrag zu NetFlow Analyse mit nfdump/nfsen

Quite old but still funny: http://pdos.csail.mit.edu/scigen/

If you ever wanted to know in which autonomous system (AS) the server is located. ASNumber is another nice plugin for firefox.

Today:

9 days ago:

Ever wanted to know the IP address of the website you are just visiting? Curios if it’s IPv4 or IPv6? Wanted to gather some additional information about the site?

If you’re using Firefox showip might be worth a look.

Thanks to Uschebit I have my own cat5-o-nine.

Sometimes I wish could work at the user hell desk again.

I was wondering why I don’t see my IPv6 address in my apache logs when I access my web page. For some reason I set .dns.disableIPv6 to true in my Firefox configuration (about:config). This is useful if your IPv6 tunnel is down or when the network administrator applied the access-list in the wrong direction (This is a story for another time.). I just didn’t changed it back to the default value.

For quick test to check if you have IPv6 connectivity or not just enter http://www.kame.net in your web browser (should be one with a GUI). If your IPv6 setup is working you should see the turtle dance.