Folks,
FYI, Nick Kernan, my Masters student, has deployed a web portal that
facilitates the comparison between various DNS resolvers, including
ISP-provided and some influential publicly available resolvers (Google’s public
DNS, OpenDNS, Quad9, and Cloudflare). The comparison is based on two factors:
the latency of DNS resolutions and the latency of TCP handshake with the CDN
edge server selected through a given resolver. The results are based on
recurrent monthly measurements from RIPE Atlas probes that have both IPv4 and
v6 connectivity, have an ISP-provided resolver available for comparison, and
which meet certain requirements regarding probe versions and reliability. You
can specify the desired month of measurement, a region of interest, and the
CDNs to analyze. You can access Nick’s portal through
https://dns-web-portal.netlify.app/ <https://dns-web-portal.netlify.app/>
The details of the methodology are in Nick’s thesis, which awaits some
copyright permissions before being made publicly available. In the meantime,
Nick (cc’ed) and I would be happy to answer any questions.
Regards,
—Misha Rabinovich
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