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Hi, I'm Iljitsch van Beijnum. This page has all posts about all subjects.

→ 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

Zie de maan schijnt door de bomen!

Image link - posted 2020-12-04 in

Clingendaal

Image link - posted 2020-11-28 in

RegioCitadis 4068 bij Madurodam

Image link - posted 2020-11-23 in

The one perfect sorting algorithm

A while ago, we discovered that there is no one perfect programming language. But is there one perfect sorting algorithm? I started thinking about that after seeing this Youtube video: The Sorting Algorithm Olympics - Who is the Fastest of them All. You may want to watch it first before continuing to read this post, as I'm going to give it away in the article.

Read the article - posted 2020-11-22

Amiga short takes: upgrading my Amiga 1200

Upgrading my Amiga 1200: 68060 CPU, memory, a new power supply, a CF card as the HDD, but mostly networking and trying different ways to get a wireless mouse to work with the Amiga, eventually succeeding with the RapidRoad USB adapter.

Read the article - posted 2020-11-01

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