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Unbound (DNS server)

Domain Name System software

Summary

Domain Name System software

Field	Value
name	Unbound
logo
logo_size	250px
screenshot	Unbound 1.22.0 screenshot.webp
caption	Screenshot of Unbound 1.22.0, showing version information, build configuration, and usage of `unbound-host` to check DNSSEC validation
developer	NLnet Labs
released
latest release version		latest release date =
repo
programming language	C
operating system	Unix-like, Windows
genre	DNS server
license	BSD-3-Clause

Unbound is a validating, recursive, and caching DNS resolver software product from NLnet Labs. It is distributed free of charge in open-source form under the Modified BSD License.

Features

Caching resolver with prefetching of popular items before they expire
DNS over TLS forwarding and server, with domain-validation
DNS over HTTPS
DNS over QUIC
Query name minimization
Aggressive use of DNSSEC-Validated Cache
Authority zones, for a local copy of the root zone
DNS64
DNSCrypt
Domain Name System Security Extensions (DNSSEC) validating
EDNS client subnet

History

Originally designed by Jakob Schlyter of Kirei and Roy Arends of Nominet in 2004, funding was provided by VeriSign and ep.net to develop a prototype written in Java (David Blacka and Matt Larson, VeriSign). In 2006, the prototype was re-written for high-performance in the C programming language by NLnet Labs.

Unbound is designed as a set of modular components that incorporate modern features, such as enhanced security (DNSSEC) validation, Internet Protocol Version 6 (IPv6), and a client resolver application programming interface library as an integral part of the architecture. Originally written for POSIX-compatible Unix-like operating system, it runs on FreeBSD, OpenBSD, NetBSD, macOS, and Linux, as well as Microsoft Windows.

Reception

Unbound has supplanted the Berkeley Internet Name Daemon (BIND) as the default, base-system name server in FreeBSD and OpenBSD, where it is perceived as smaller, more modern, and more secure for most applications.

References

(2018-06-07). "Actually secure DNS over TLS in Unbound".
(8 October 2020). "Unbound 1.12.0 released".
(9 October 2020). "DNS-over-HTTPS in Unbound".
(2024-12-20). "Unbound 1.22.0 released".
(10 December 2015). "Unbound 1.5.7 release".
(15 March 2018). "Unbound 1.7.0 Release".
(15 March 2018). "Unbound 1.7.0 Release".
(8 November 2023). "unbound.conf(5) - Unbound 1.19.0 Documentation".
"Open source DNS server takes on BIND".
(August 23, 2014). "Heads Up: BIND Disabled in Base".
Dag-Erling Smørgrav. (September 24, 2014). "DNS in FreeBSD 10".

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

dns-software free-network-related-software free-software-programmed-in-c dns-server-software-for-linux software-using-the-bsd-license

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