Technitium DNS Server is open-source software for running your own DNS server, both authoritative and recursive, with a web console for administration. It blocks ads and malware through blocklists, forwards queries in encrypted form using DNS-over-TLS, DNS-over-HTTPS and DNS-over-QUIC, and can also serve those protocols itself. It further supports DNSSEC validation and signed zones, a built-in DHCP server, clustering, sign-in via OpenID Connect and LDAP, two-factor authentication and an HTTP API. It is intended for self-hosting on Windows, Linux, macOS or Raspberry Pi, or as a Docker image.
The software is licensed under the GNU GPLv3 and its source code is on GitHub. According to independent sources, the project is maintained by Technitium, with developer Shreyas Zare in India; the vendor itself gives no location. Because the organisation runs the server on its own infrastructure, DNS data stays in a location it chooses, for example within the EU, and no cloud service from the vendor is involved. Administration and maintenance remain the organisation's own responsibility.