Image couldn't load - you don't seem to have IPv6 connectivity

blog topics: BGP · IPv6 · more · writing: Ars Technica · BGP (O'Reilly, 2002) · publications · contact: Twitter · LinkedIn · email · 🇺🇸 🇳🇱

Hi, I'm Iljitsch van Beijnum. This is the main page of the site.

Fun with fonts!

After many years of using Century Gothic and its clone URW Gothic Book for my website, I felt it was time to reconsider that choice. So I went font hunting!

Over the course of my hunting expedition, found a nice new font, Muli, and I created a page that lets you compare different fonts and their weights interactively. Have a look.

Permalink - posted 2019-12-12

After sunset

Image link - posted 2019-12-04

Time to turn off IPv4 (just a little)

Another month, and we'll be living in the 2020s. And yet, 70% of the internet is still IPv4-only. (I'll be writing a story looking back on IPv6 progress the past decade in January.) So I thought: maybe I should draw a line in the sand and turn off IPv4 for my website. But then how will those 70% find me, and all the links to older content will be dead to much of the internet. Click below to continue reading.

Note: this is an example of the warning image, your IPv6 connectivity may be fine!

Full article / permalink - posted 2019-12-03 - 🇳🇱 Nederlandse versie

Tijd om IPv4 uit te zetten (een beetje)

Over een maand leven we in de jaren '20 van de 21e eeuw. En toch heeft 70% van het internet nog steeds alleen maar IPv4. (In januari schrijf ik een verhaal dat terugkijkt naar de voortgang van IPv6 in het afgelopen decennium.) Dus ik dacht: misschien moet ik een streep trekken en IPv4 uitschakelen voor mijn website. Maar dan kan 70% me niet meer vinden, en de links naar oudere artikelen zijn dan dood voor een groot deel van het internet. (Klik beneden om verder te lezen.)

Let op: dit is een voorbeeld van de waarschuwing, je IPv6-connectiviteit kan prima in orde zijn.

Volledig artikel / permalink - geplaatst 2019-12-03 - 🇺🇸 English version

→ America is not the land of the free but one of monopolies so predatory they imperil the nation

Excellent piece by Observer/Guardian columnist Will Hutton based on the work of economist Thomas Philippon:

The news is that over the last 20 years per capita EU incomes have grown by 25% while the US’s have grown 21%


The US economy is becoming increasingly harmed by ever less competition, with fewer and fewer companies dominating sector after sector – from airlines to mobile phones.


But why has this happened now? Philippon has a deadly answer. A US political campaign costs 50 times more than one in Europe in terms of money spent for every vote cast. [...] Corporations want a return on their money, and the payback is protection from any kind of regulation, investigation or anti-monopoly policy that might strike at their ever-growing market power.

A real eye-opener.

Permalink - posted 2019-12-02

Slides: AS paths: long, longer, longest

Presentation slides from my lightning talk "AS paths: long, longer, longest" at the RIPE-79 meeting in Rotterdam, 18 October 2019.

Permalink - posted 2019-11-29

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