• 22 min read
Comparing ASN rankings by spam volume from two different data sources, CBL and PSBL (with a side trip to the University of Texas Computer Science Department), indicates there is enough correlation to have confidence in the rankings.
Rene Wilhelm is a senior research engineer in the R&D department at the RIPE NCC. Coming from a background in particle physics, Rene joined the RIPE NCC in 1996. His interests are in data analysis, routing, Internet measurements and visualisation. More
• 5 min read
Last month we published a graph that shows how complete the RIPE Routing Registry really is. How many of the organisations that receive an Autonomous System Number (ASN) from the RIPE NCC use the RIPE Routing Registry to register their route objects. The results were encouraging. But do these route…
Based in Amsterdam, NL
I'm a data scientist at the RIPE NCC. I'm a chemist by training, but have been working since 1998 on Internet related things, as a sysadmin, security consultant, web developer and researcher. I am interested in technology changes (like IPv6 deployment), Internet measurement, data analysis, data visualisation, sustainability and security. … More
• 6 min read
At the recent RIPE 61 meeting in Rome and at earlier meetings, we heard that connectivity over 6to4 is not very dependable, which hampers IPv6 deployment. I wondered how bad it really is and started measuring it. This article describes what I measured and shows the results. Spoiler: It's pretty bad.
Based in Western Europe, NL&DE mostly
>>>>>>>>>>>> https://www.ripe.net/about-us/press-centre/publications/speakers/daniel-karrenberg <<<<<<<<<<<< Ample information about his past sins can be found using your favourite search engine. Following are a few additional keywords you might use, arranged by decade: 1980s: GUUG EUUG EUnet unido mcvax cwi RARE iepg RIPE; 1990s: RIPE+NCC rir iana postel terena ebone centr k.root-servers.net; 2000s: dnsmon … More
• 3 min read
RIPE Atlas probes are now active on five continents. After the big run on the measurement probes during the recent RIPE Meeting, the deployment is a little slower than expected; but there is a steady stream of probes coming online. We expect to make our initial goal of 300 active probes well before…
Based in Amsterdam, The Netherlands
I wrote the articles collected here during my time as community builder of the RIPE NCC and the maintainer and editor of RIPE Labs. I have since taken on a new role serving as the Chair of the RIPE Community. You can reach my new profile via the website link … More
• 4 min read
The LIR Portal is one of the most important communication tools between the RIPE NCC and its members. It has been migrated to a new system without any service interruption or significant changes for the users.
• 19 min read
Last week we published a proposal for new organizational layers in order to be more effective in fighting spam. In this article we describe planned experiments to determine the effects of outbound spam reputation on Internet organizations.
Based in Amsterdam, The Netherlands
I wrote the articles collected here during my time as community builder of the RIPE NCC and the maintainer and editor of RIPE Labs. I have since taken on a new role serving as the Chair of the RIPE Community. You can reach my new profile via the website link … More
• 3 min read
Please find below a list of all articles related to the IPv6 RIPEness study showing how IPv6 is deployed by country, based on four different criteria.
• 15 min read
Following up from an earlier article on RIPE Labs, we now present 3 new Internet organizational layers to provide economic incentives to cooperate more on improving Internet security. What is needed is better coordination and motivation through reputational and financial incentives.
Based in Amsterdam, The Netherlands
I wrote the articles collected here during my time as community builder of the RIPE NCC and the maintainer and editor of RIPE Labs. I have since taken on a new role serving as the Chair of the RIPE Community. You can reach my new profile via the website link … More
• 4 min read
One way to determine the denseness of the Internet, or its “interconnectedness”, is to look at the path length between Autonomous Systems (ASes). And are there any differences visible when looking at IPv4 or IPv6 networks? See our findings in this article.
For many years I have been the leader of the Research and Development team at the RIPE NCC leading a dedicated team of thinkers to support the RIPE community by providing network research, data analysis and prototype tool development and services including RIPE Atlas and RIPEstat. As of 2023, I'm … More
• 6 min read
The launch date of our new active measurements network, RIPE Atlas, is close. We already received a lot of interest and offers to host such a probe. In this article, we explain some more details about how to participate in this effort.
