Unbound

Unbound is a DNS resolver that provides a range of features and capabilities to improve online privacy and security. Key features include support for DNS-over-TLS and DNS-over-HTTPS, which allows clients to encrypt their communication, as well as support for various modern standards that limit the amount of data exchanged with authoritative servers. Unbound is designed to be fast and lean, and it incorporates modern features based on open standards. From a technical perspective, Unbound runs on all Linux and BSD distributions, as well as macOS, with packages available for most platforms. It is free, open source software under the BSD license, with a focus on security and privacy. Specific use cases for Unbound include setting up a resolver for a machine or network, which can be done with only a few lines of configuration. Unbound is also included in the base-system of all major BSD operating systems and in the standard repositories of most Linux distributions. One of the unique differentiators of Unbound is its commitment to security and privacy, with guiding principles that prioritize the security and privacy of the user, and a development roadmap that is driven by user feedback and community input.