Unbound

Validating, recursive, caching DNS resolver.

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About Unbound

Unbound resolves DNS queries recursively with DNSSEC validation and caching, and supports DNS-over-TLS and DNS-over-HTTPS both for clients connecting to it and for its own upstream queries. It is designed to be small, fast and secure.

Strengths

  • DNSSEC validation and encrypted transports in a small, audited resolver
  • Runs recursively, so no upstream resolver sees your queries

Limitations

  • Configuration is a text file with many options
  • No filtering or blocklists of its own; that needs another layer

Details

Pricing
FreeFree and open source under the BSD licence.
License
BSD-3-Clause
Developer
NLnet Labs
Platforms
Windows, macOS, Linux, Self-hosted
How it runs
Self-hosted
Best suited for
Validating, recursive, caching DNS resolver
Categories
DNS filtering
Last verified
Added
Provenance
Selected from the TechWalrus Resource Hub (Networking & Diagnostics); facts checked against the developer's own pages, 3 sources on file.

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