Knot Resolver review
A free, open-source recursive resolver for encrypted DNS on Linux.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Knot Resolver is an open-source, caching and validating recursive DNS resolver for Linux and self-hosted deployments. It suits administrators running DNS for home network routers, infrastructure, or large resolver farms. The software focuses on recursive resolution rather than authoritative DNS, with DNSSEC validation, encrypted DNS protocols, forwarding policies, filtering, monitoring, and cache management. It is distributed under the GPL license and can be installed through Linux packaging systems or deployed with Docker.
Pricing is straightforward: Knot Resolver is free and open source, with no paid plan structure described. The published product details identify an open-source pricing model and GPL distribution, so the main consideration is operational ownership rather than selecting between feature tiers. Administrators receive caching recursive DNS, DNSSEC validation, DNS-over-TLS, DNS-over-HTTPS, DNS-over-QUIC, configurable access and forwarding policies, and performance controls within the same software. That makes it a fit for teams that want protocol coverage and control without a commercial subscription model.
Its strongest differentiator is the combination of encrypted DNS support and runtime administration. Configuration and operations are available through configuration files, the kresctl command-line utility, and an HTTP management API, while cache controls and forwarding policies support tailored resolver behavior. The trade-off is focus: Knot Resolver handles recursive DNS, not authoritative DNS, and its Linux or Docker deployment model places setup and ongoing administration with the operator. Choose it for self-managed encrypted recursive DNS; choose another product when authoritative hosting or a managed service is the primary requirement.
Knot Resolver pros and cons
- Where it wins
- Supports DNS-over-TLS, DNS-over-HTTPS, and DNS-over-QUIC
- Combines caching recursion with DNSSEC validation and trust-anchor management
- Offers CLI, HTTP API, forwarding policies, and cache controls
- Where it doesn't
- Does not provide authoritative DNS
- Requires Linux or Docker and self-hosted administration
- Configuration spans files, CLI management, and an HTTP API
Knot Resolver fact sheet, pricing and score →
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