About this blog…

I am employed by Netnod as head of engineering, research and development and am among other things chair of the Security and Stability Advisory Committee at ICANN. You can find CV and photos of me at this page.

As I wear so many hats, I find it being necessary to somewhere express my personal view on things. This is the location where that happens. Postings on this blog, or at Facebook, Twitter etc, falls under this policy.

The views expressed on this post are mine and do not necessarily reflect the views of Netnod or any other of the organisations I have connections to.

Blocking the Internet is a dangerous path for Sweden

Today Feb 7, 2016, I am together with Anders Ahlqvist, Swedish Police, and Jon Karlung, CEO of the ISP Bahnhof, writing an article in Swedish on why blocking is the wrong path forward. You can find the article in Swedish here, and below a translation to English made by myself.

The proposal […]


In the USA, there is a proposed legislation that at the moment goes under the popular name PROTECT IP that is sort of a follow-up of COICA. You can find the proposal that under the formal name of GRA11400. Among other things the proposal talks about requirement of under some circumstances blocking of resolution of […]

Blocking access with DNS is not effective

Using DNS as a tool to prevent access to resources does not work. In reality, any blocking, at any layer in the Internet Architecture, will always be a combination of not be effective and hurt more than what is the intention. And because of that the effectiveness varies.

Two examples:

A domain name is blocked […]