Hi Jesse,
This is related to a DDoS attack against multiple DNS root servers.
You can read a report about it here:
https://root-servers.org/media/news/2025-12-23_DDoS.pdf
Kind regards,
Leon Grasmeijer
RIPE NCC / K-root
On 06/06/2026 12:40, Jesse Prins wrote:
Hey all! For the final research project for my bachelor I am
researching timeouts involving the Root DNS servers using RIPE atlas
measurements. In my research I stumbled upon (in my opinion) a weird
event that I can’t find any causes for. On the 23rd of December there
was a spike (ranging from 10% - 60% depending on the server) in
timeouts involving all root servers except F, G and H which don’t show
any spike at all (see
https://rootviz.sidnlabs.nl/public-dashboards/f81c02c68d7a4986ba1674fd7eb87b74?from=2025-12-23T00:00:00.000Z&to=2025-12-23T23:59:59.000Z&timezone=utc
<https://rootviz.sidnlabs.nl/public-dashboards/f81c02c68d7a4986ba1674fd7eb87b74?from=2025-12-23T00:00:00.000Z&to=2025-12-23T23:59:59.000Z&timezone=utc>).
My main question is if there were any problems with RIPE atlas itself
around this time (causing an artifical spike)? and if not: Does anyone
know what could have caused such a global spike in timeouts? Thanks in
advance.
Kind regards,
Jesse Prins
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