Unbound (DNS server)

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

Unbound
Developer(s)NLnet Labs
Initial releaseFebruary 19, 2007 (2007-02-19)
Stable release
1.11.0 / July 27, 2020 (2020-07-27)[1]
Repository
Written inC
Operating systemUnix-like, Windows
TypeDNS server
LicenseBSD license
Websiteunbound.net 

Features
  • Caching resolver with prefetching of popular items before they expire
  • DNS over TLS forwarding and server, with domain-validation[2]
  • DNS64
  • DNSCrypt[3]
  • 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. [4]

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, OS X, 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.[5][6]

gollark: I don't think the exchange rate's that far off.
gollark: Weird that the euro cost is twice the GBP cost.
gollark: Anyway, the system requirements don't look very high.
gollark: Sometimes I exchange capital for goods and services.
gollark: I don't know what that is in Europe currency.

See also

References
  1. Wijngaards, Wouter (27 July 2020). "Unbound 1.11.0 released". unbound-users (Mailing list). Retrieved 27 July 2020.
  2. "Actually secure DNS over TLS in Unbound". Ctrl blog. 2018-06-07. Retrieved 2018-06-11.
  3. "Adding DNSCrypt to Unbound". ProToxin. 2017-04-14. Retrieved 2018-06-11.
  4. Eric Brown. "Open source DNS server takes on BIND". Retrieved 2020-03-21.
  5. "Heads Up: BIND Disabled in Base". OpenBSD Journal. August 23, 2014. Retrieved June 10, 2015.
  6. Dag-Erling Smørgrav (September 24, 2014). "DNS in FreeBSD 10". Dag-Erling Smørgrav's blog. Retrieved June 10, 2015.
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