Unbound (DNS server)
|Initial release||February 19, 2007|
1.9.3 / August 27, 2019
|Operating system||Unix-like, Windows|
- Caching resolver with prefetching of popular items before they expire
- DNS over TLS forwarding and server, with domain-validation
- DNSSEC validating
- EDNS Client Subnet
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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, OS X, and Linux, as well as Microsoft Windows.
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.
- Wijngaards, Wouter (27 August 2019). "Unbound 1.9.3 released". unbound-users (Mailing list). Retrieved 27 August 2019.
- "Actually secure DNS over TLS in Unbound". Ctrl blog. 2018-06-07. Retrieved 2018-06-11.
- "Adding DNSCrypt to Unbound". ProToxin. 2017-04-14. Retrieved 2018-06-11.
- "Heads Up: BIND Disabled in Base". OpenBSD Journal. August 23, 2014. Retrieved June 10, 2015.
- Dag-Erling Smørgrav (September 24, 2014). "DNS in FreeBSD 10". Dag-Erling Smørgrav's blog. Retrieved June 10, 2015.
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