[atlas] a link for comparing DNS resolvers

Dear Misha and Nick,

Thank you for sharing the results of your (MSc?) research project. 
Clear and informative graphs of your measurements.

A suggestion.  When inspecting the probe maps, Europe is 
over-represented, which is no surprise given the number of probes in 
this region.  But when you select 400 probes, you can "steer" the 
selection for better global coverage.  In the probe selection, you can 
specify the West, North/South-Central and North/Southeast area and the 
number of probes per area.  Perhaps this will allow you to better spread 
the available probes over the different areas for a "balanced" global 
measurement.

You already present the selection of regions on the web page, but for 
Africa this results in 7 (successful) probes for January 2023.

Cheers,

-- Benno


On 23/03/2023 23:56, Michael Rabinovich wrote:
> 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
> 

-- 
Benno J. Overeinder
NLnet Labs
https://www.nlnetlabs.nl/