APNIC: How to Deploy DoT and DoH with dnsdist

DNS privacy is a major concern for many, and for good reasons. DNS requests contain fields that are considered private, which reveal sensitive information about someone’s browsing and Internet activities. To address these issues, two DNS privacy standards have grown in popularity over the last couple of years – DNS-over-TLS (RFC 7858) and DNS-over-HTTPS (RFC 8484).

DNS-over-TLS (or DoT) provides encrypted transport for DNS transactions. This is achieved by encrypting DNS traffic using TLS. DNS-over-HTTPS (DoH) provides another form of secure transport where DNS queries and responses are passed as HTTPS traffic. This also allows web applications to access DNS information using an API.

Below is a simple tutorial to implement these privacy standards. We will be using the Ubuntu 18.04 LTS (Bionic Beaver) server.

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