Global number of vantage points from all tools

0 10000

For every country, how many vantage points (DNS resolvers, echo servers, discard servers, HTTP servers and HTTPS servers) do we have? To calculate this, we take our list of filtered resolvers and vantage points and geolocate them using MaxMind.

Data shown from Quack Echo scan on 2020-11-05

Data shown from Quack Discard scan on 2020-11-06

Data shown from Hyperquack HTTP scan on 2020-11-05

Data shown from Hyperquack HTTPS scan on 2020-11-05

Data shown from Satellite scan on 2020-11-04

Satellite

Satellite is a tool to detect DNS interference remotely, scalably, ethically, and globally. We begin by identifying open DNS resolvers in the IPv4 space and filtering it to rigorous ethical standards, utilizing only about 10,000 of 10,000,000 resolvers (0.1%) spanning 170 countries. We use the latest Alexa top 1K and Citizen Lab global test list as our input domains, and query every resolver with every domain.

Using multiple heuristics to avoid false positives, such as AS number, HTTP static content hash, and X.509 certificate trust, we compare with answers from designated control resolvers to determine the occurrence of interference. The following visualizations showcase a small subset of conclusions that can be made from Satellite, and more can be gleaned from our raw historical data.

Percentage of resolvers facing interference by country

0 20%

For every country, what percentage of domains in our input list is disrupted? To calculate this, we take the average of percentage domains disrupted for every resolver, per country.

Top disrupted domains by country

For every country, which domains are disrupted most often? To calculate this, we take the domains which are disrupted by the highest percentage of total resolvers, per country, and present the top 10.

Number of DNS resolvers by country

0 3000

For every country, how many vantage points (DNS resolvers) do we have? To calculate this, we take our list of filtered resolvers and geolocate them using MaxMind.

Data shown from Quack Satellite scan on 2020-11-04