Clouding up the Internet: How centralized is DNS traffic becoming?

Giovane C.M. Moura, Sebastian Castro, Wes Hardaker, Maarten Wullink, Cristian Hesselman

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

36 Citations (Scopus)
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Concern has been mounting about Internet centralization over the few last years - consolidation of traffic/users/infrastructure into the hands of a few market players. We measure DNS and computing centralization by analyzing DNS traffic collected at a DNS root server and two country-code top-level domains (ccTLDs) - one in Europe and the other in Oceania - and show evidence of concentration. More than 30% of all queries to both ccTLDs are sent from 5 large cloud providers. We compare the clouds resolver infrastructure and highlight a discrepancy in behavior: some cloud providers heavily employ IPv6, DNSSEC, and DNS over TCP, while others simply use unsecured DNS over UDP over IPv4. We show one positive side to centralization: once a cloud provider deploys a security feature - such as QNAME minimization - it quickly benefits a large number of users.

Original languageEnglish
Title of host publicationIMC 2020 - Proceedings of the 2020 ACM Internet Measurement Conference
PublisherAssociation for Computing Machinery
Number of pages8
ISBN (Electronic)9781450381383
Publication statusPublished - 27 Oct 2020
EventACM Internet Measurement Conference, IMC 2020 - Online
Duration: 27 Oct 202029 Oct 2020


ConferenceACM Internet Measurement Conference, IMC 2020
Abbreviated titleIMC


  • n/a OA procedure


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