Op 12 april organiseerde het Platform voor InformatieBeveiliging (PvIB) een avond over het onderwerp zijn we niet teveel afhankelijk van de Cloud geworden? Ik was één van de drie sprekers en vertelde over hoe je je connectiviteit naar de verschillende clouddiensten en - aanbieders zo robuust mogelijk kan inrichten.
Dit is mijn presentatie van die avond.
Lees het artikel - geplaatst 2022-04-12
Recently, I was looking through some networking certification material. A very large part of it was about OSPF. That's fair, OSPF is probably the most widely used routing protocol in IP networks. But the poor students were submitted to a relentless sequence of increasingly baroquely named features: stub areas, not-so-stubby-areas, totally stubby areas, culminating in totally not-so-stubby areas.
Can we please get rid of some of that legacy? And if not from the standard documents or the router implementations, then at least from the certification requirements and training materials?
Lees het artikel - geplaatst 2022-05-12
The tag line for World IPv6 Launch ten years ago was "the future is forever". You know what else seems to be forever? The past. Let's talk about IEEE 802 LLC/SNAP encapsulation.
I always thought when you send IP packets over Wi-Fi, the IP packet would go inside an Ethernet frame, and then the Ethernet frame inside an IEEE 802.11 frame. Turns out this is not how it works: ...
Lees het artikel - geplaatst 2022-07-21
When I wrote my first BGP book I painstakingly made the config examples on actual Cisco routers. In my opinion, it's crucial to make sure that configuration examples that go in a book actually work.
So when I started writing my new BGP book, I did the same. But this time, I used open source routing software (FRRouting) running in Docker containers. Basically, those containers are very light-weight virtual machines.
This makes it possible to run a dozen virtual routers that start up and shut down in just a few seconds. So it's very easy to run different examples by starting the required virtual routers with the configuration for that example.
This was super useful when I was writing the book.
So I thought it would also be very useful for people reading the book.
So I'm making the "BGP minilab" with all the config examples from the book available to my readers. Download version 2022-11 of the minilab that goes with the first version of the book here.
You can also run the examples in the minilab if you don't have the book. And you can create your own labs based on these scripts.
The minilab consist of four scripts:
There are Mac/Linux shell script and Windows Powershell versions of each script.
Permalink - geplaatst 2022-11-11