Technitium DNS Server

Technitium DNS Server is an open-source authoritative and recursive DNS platform that you run on your own infrastructure. It is aimed at privacy-focused self-hosters, developers, and small to medium networks that want filtering, DNS hosting, and administration in one system.

Overview

Technitium combines authoritative DNS hosting with recursive resolution, so it can serve your own zones and handle everyday network lookups. Primary, secondary, stub, and conditional forwarder zones cover varied routing and delegation needs. That makes it more capable than a simple network-wide blocker, but it also assumes you are willing to operate DNS infrastructure yourself.

The project is free, open source, and self-hosted. Registration is not required; the privacy policy says that, beyond web server logs, the maker does not collect or know user information. Email support, a user manual, an FAQ, and a Reddit community provide help when administration questions arise.

Key features

Daily-updating block-list URLs can block ads and malware across an entire network. Safe-search controls and basic activity reports add practical oversight, although the reporting is not a replacement for a deep analytics or monitoring product.

Encrypted forwarding is available through DNS-over-TLS, DNS-over-HTTPS, and DNS-over-QUIC. You can forward queries to Cloudflare, Google, Quad9, or AdGuard, giving privacy-conscious administrators several public resolver choices. DNSSEC validation and signed zones protect DNS integrity, while a separate app supplies DNS-rebinding attack protection.

A browser-accessible console includes built-in clustering for two or more server instances. OpenID Connect single sign-on, LDAP, role-based access, and TOTP two-factor authentication make the administrative surface suitable for organizations with established identity controls. The HTTP API supports scripts and third-party applications, and the built-in DHCP server can serve multiple networks.

Pricing

Technitium DNS Server — free. The plan is open source and self-hosted, with custom blocklists, safe-search controls, basic activity reports, and support for Windows, Linux, macOS, Raspberry Pi, Docker, and local networks. There is no paid tier or free trial to evaluate; the trade-off for the zero price is that you provide the hardware, deployment, maintenance, and DNS administration.

Platforms

Downloads are offered for Windows, Linux, macOS, and Raspberry Pi arm7, with an official Docker image and an HTTP API. The web console provides browser-based administration, while local-network deployment supports the included DHCP service. Raspberry Pi arm6 hardware, including Raspberry Pi 1 and Raspberry Pi Zero, is not supported, so those devices cannot be used for this deployment.

Who it's for

Choose Technitium if you want to self-host DNS for privacy and security, need both authoritative and recursive roles, or are developing and testing DNS software. It is also a strong fit for small to medium networks that want network-wide ad and malware blocking, encrypted upstreams, DHCP, and centralized administration without a subscription.

It is a poor fit if you want a provider-managed DNS service, do not want to maintain a server, or rely on Raspberry Pi arm6 hardware. The breadth of roles and security controls rewards an administrator comfortable with DNS concepts and ongoing upkeep.

Pros and cons

Pros

• Broad DNS coverage: Authoritative and recursive service, plus four zone roles, handles hosting and local resolution in one installation.
• Strong privacy and security options: DNS-over-TLS, DNS-over-HTTPS, DNS-over-QUIC, DNSSEC, signed zones, and rebinding protection cover both transport and DNS integrity.
• Network-wide controls: Daily blocklists, safe search, DHCP for multiple networks, and encrypted forwarding extend beyond basic DNS hosting.
• Administration and integration: Clustering, enterprise authentication methods, TOTP, and an HTTP API support managed deployments and automation.
• No license cost: The open-source self-hosted plan is free without registration.

Cons

• Self-hosting responsibility: You must supply compatible infrastructure and handle deployment, updates, reliability, and DNS configuration.
• Limited reporting: Activity reports are basic, so operators seeking extensive analytics will need other tooling.
• Hardware exclusion: Raspberry Pi arm6 devices, including Pi 1 and Pi Zero, are unsupported.

Alternatives

AdGuard DNS is the better choice when you want a freemium service available across mobile, desktop, web, API, and self-hosted environments, with a free starter plan and trial.

Comodo Secure DNS suits enterprises and MSPs seeking a free gateway plan with up to 300,000 DNS requests per month.

NextDNS is preferable for hosted, multi-device filtering: its free plan allows 300,000 queries per month, unlimited devices, unlimited configurations, and all features.

NxFilter offers a free-for-all-purpose freeware option, with a paid Jahaslist plan also available.

OpenDNS FamilyShield is a simpler free choice preconfigured to block adult content without sign-up.

Quad9 provides a free DNS service with no contract or sign-up process.

Blocky is another free, open-source, self-hosted DNS proxy.

Pi-hole is free, open-source filtering software for supported Linux hardware or Docker.

For broader comparisons, see DNS Filtering Software and Internet Filtering Software.

Verdict

Technitium DNS Server is a strong recommendation for privacy-minded administrators who want free, self-hosted DNS with authoritative hosting, recursive resolution, filtering, security controls, and network services in one package. Choose it for breadth and control; choose a managed alternative if you want less operational responsibility or need Raspberry Pi arm6 support.