Unbound 1.4.4

A validating, recursive, and caching DNS resolver
Unbound - Usage message
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Unbound is a validating, recursive, and caching DNS resolver.

The C implementation of Unbound is developed and maintained by NLnet Labs. It is based on ideas and algorithms taken from a java prototype developed by Verisign labs, Nominet, Kirei and ep.net.

Unbound is designed as a set of modular components, so that also DNSSEC (secure DNS) validation and stub-resolvers (that do not run as a server, but are linked into an application) are easily possible.

Unbound's source code is distributed under a BSD License.

last updated on:
June 6th, 2010, 22:09 GMT
license type:
BSD License 
developed by:
NLnet Labs
ROOT \ System \ Networking
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What's New in This Release:
  • Features:
  • Experimental ECC-GOST algorithm support, needs openssl-1.0.0 and currently needs ldns from svn trunk. Uses ECC-GOST algorithm number 12 (assigned by IANA). As the RFC is written, we intend to make it optional, because a dependency on openssl-1.0.0 is hard across distributions right now.
  • unbound-host disables use-syslog from config file so that the config file for the main server can be used more easily.
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