DNS over TLS

DNS over TLS (DoT) is a security protocol for encrypting and wrapping Domain Name System (DNS) queries and answers via the Transport Layer Security (TLS) protocol. The goal of the method is to increase user privacy and security by preventing eavesdropping and manipulation of DNS data via man-in-the-middle attacks.

As of 2020, Cloudflare, Quad9, Google, Quadrant Information Security, CleanBrowsing, LibreOps, DNSlify[1] and Telsy[2] are providing public DNS resolver services via DNS over TLS.[3][4][5][6][7][8] In April 2018, Google announced that Android Pie will include support for DNS over TLS,[9] allowing users to set a DNS server phone-wide on both WiFi and mobile connections, an option that was historically only possible on rooted devices. DNSDist, from PowerDNS also announced support for DNS over TLS in its latest version 1.3.0.[10] BIND users can also provide DNS over TLS by proxying it through stunnel.[11] Unbound has supported DNS over TLS since 22 January 2018.[12][13] Unwind has supported DoT since 29 January 2019.[14][15] With Android Pie's support for DNS over TLS, some ad blockers now support using the encrypted protocol as a relatively easy way to access their services versus any of the various work-around methods typically used such as VPNs and proxy servers.[16][17][18]