IPv6 guest lecture for Hochschule Augsburg

Last week I recorded a remote guest lecture about IPv6 for the Computer Networks course at the Hochschule Augsburg with Rolf Winter. It's a 63 minute Youtube video, with mostly me talking about IPv6 and Rolf interjecting with questions now and then. Have a look over at Youtube.

And these are my slides.

Permalink - posted 2020-12-22

The evolution of computer keyboards since 1980

It's interesting to see how much has stayed the same over 40 years, and also how some keys have been moved around, as well as the differences between Apple's keyboards and the standard PC keyboard.

So I drew the layout of 18 keyboards to easily compare IBM, Apple, Digital, Sun, Amiga, Atari and third party keyboards over the years.

Permalink - posted 2020-12-17

→ The dark side of BGP community attributes

An article I wrote for the Noction blog looking at possible attacks using the BGP community attribute.

A while ago, RIPE Labs published the two-part article BGP Communities – A Weapon for the Internet. That may have been a bit of a shock for those of us making good use of BGP community attributes as an important tool in our BGP arsenal.

Conclusions:

This community-based attack is definitely something we need to be prepared for and defend against. But does this warrant considering BGP communities “a weapon for the internet”? That seems a bit extreme.

But:

Treat your BGP communities with respect, you don’t want to encounter their dark side.

Permalink - posted 2020-12-07