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This is the main page of the site. Archive for 2012.

Creative spelling

I ran into a post on the Vanity Fair website called "Should Vanity Fair Be a Spelling Vigilante?" which asks the question whether the Vanity Fair editors should deviate from regular spelling of strange-looking words and names. Unfortunately, most of the commenters on this post can't seem to take this topic very seriously. That's a shame, because people learning English waste a decade of their lives learning the truly bizarre spelling of that language.

Read the article - posted 2012-01-14

The mute switch issue

The past week there's been a lot of blog talk about an iPhone going off during a performance of the New York Philharmonic. Apparently someone had just had his Blackberry replaced with an iPhone, and when the iPhone alarm went off despite the "ringer/silent" switch set to silent, the poor new iPhone user first of all didn't notice it was his phone interrupting the performance at first, and then had a hard time killing the alarm.

Read the article - posted 2012-01-19

IPv6 in operating systems since my book was published

I sometimes get the question whether my book "Running IPv6" is still current. Since publication in 2005, not much has changed with regard to the core IPv6 protocols. I may go over what's new in this regard at some point in the future. However, what has changed significantly are the operating systems and other software mentioned in the book. The main things to be aware of are:


In Windows XP, IPv6 is a protocol separate from IPv4 that must be installed explicitly. In Windows Vista and Windows 7, IPv6 support is integrated with IPv4 and enabled by default. Vista/7 use something other than the system's MAC address as the interface identifier in link local addresses and stateless autoconfiguration. Unlike XP, Windows Vista and Windows 7 support DHCPv6 for both address configuration and to learn DNS resolver addresses.


In MacOS 10.7 Apple enabled privacy addresses with stateless autoconfig by default and added DHCPv6 support for address configuration and to learn DNS resolver addresses. Also, the system tries looks at the round trip time towards a destination over IPv6 and IPv4, and will use the protocol that has the lowest RTT. So MacOS 10.7 will often connect over IPv4 to destinations that have both IPv4 and IPv6 in the DNS. This makes things harder to debug, but the upside is that it avoids timeouts with broken IPv6 setups. As of 10.6.5 MacOS will prefer IPv4 over IPv6 if it has 6to4 connectivity.


The iPhone, iPod touch and iPad didn't exist yet in 2005. IPv6 support was added for these devices in iOS 4 and is relatively mature in iOS 5, with stateless autoconfig and privacy addresses as well as DHCPv6 support. It looks like iOS 5 also uses the RTT-based IPv4/IPv6 selection mechanism present in MacOS 10.7.


The DHCP software mentioned in the book is quite bad. A much better option is the ISC dhcpd, which now also supports IPv6.

Permalink - posted 2012-02-20

New iPod battery

This week, I installed a new battery in my fifth generation iPod.

Read the article - posted 2012-03-11

La tour Eiffel - Eiffeltoren - Eiffel Tower

Image link - posted 2012-03-27

→ The 10 features removed from Mountain Lion that we miss the most

Apple's ruthless simplification left Mountain Lion skinnier than we'd like.

Read the article - posted 2012-08-10

Vernieuwing spoor tram 12 hoek Teijlerstraat/Beeklaan Den Haag

Image link - posted 2012-08-26


Image link - posted 2012-08-27

Tramtoerist in Den Haag

Mijn middag als tramtoerist in de regio Haaglanden op zaterdag 13 oktober.

Aan het eind nog een paar tips voor degenen die ook Den Haag per tram willen zien, maar allereerst zou ik op basis van mijn middag gister tramtoerisme van harte willen aanbevelen, zeker als je enige waardering voor architectuur (-geschiedenis) hebt. Het is met name een uitkomst bij wisselvallig weer: bij regen spring je in een tram, als het weer even droog is stap je uit om wat rond te kijken en wandel je een stukje. Let wel op dat de lol er vrij snel vanaf is als het donker wordt, want door de verlichting binnen zie je dan buiten zowat niks meer.

Read the article - posted 2012-10-14

Laatste benelux-intercity vertrekt van Den Haag Hollands Spoor

Anderhalf uur geleden vertrok, na 55 jaar dienst, voor de laatste keer de benelux-intercity naar Brussel via Rotterdam, Dordrecht, Roosendaal, Antwerpen en Mechelen.

Read the article - posted 2012-12-09

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