Measuring QoE Impact of DoE-based Filtering

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  • December 15, 2021
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In this paper, we analyse the impact of DNS-based
filtering on Quality of Experience (QoE). We use three DNS
standard protocols: regular DNS (Do53), DNS over HTTPS
(DoH) and DNS over TLS (DoT) on Quality of Experience. We
conduct measurements against four open public DNS service
providers (Cloudflare, CleanBrowsing, Adguard and Quad9) under
three network conditions; Campus wired network, Eduroam
and 4G. We aim to establish whether the filters from the
same provider have statistically significant differences. This
information could be used by Internet users and Internet Service
Providers to make sound decisions when choosing DNS privacy
services. The results show significant DNS response time and
page load time differences between non-filtered and filtered DNS
recursive resolvers from Cloudflare, Adguard and Quad9. We
do not observe significant differences in page load times when
CleanBrowsing resolvers are used despite observing significant
differences in DNS response times. The results further show
that some filters would provide better QoE than non-filtered