System administration

NSD – NLnet Labs Name Server Daemon

The NLnet Labs Name Server Daemon (NSD) is an authoritative DNS name server.

It has been developed for operations in environments where speed, reliability, stability and security are of high importance.

This is free and open source software.

Key Features

  • High performance – suited for Top Level Domain implementations, DNS Root servers and anyone in need of a fast and optimised authoritative name server
  • Strives to be a reference implementation for emerging standards of the Internet Engineering Task Force (IETF).
  • Cross-platform support.

Website: www.nlnetlabs.nl/projects/nsd
Support: GitHub Code Repository
Developer: NLnet Labs
License: BSD 3-Clause “New” or “Revised” License

NSD is written in C. Learn C with our recommended free books and free tutorials.


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NSDNLnet Labs Name Server Daemon
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Read our verdict in the software roundup.


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