High-performance authoritative-only DNS server

Knot DNS is a high-performance authoritative-only DNS server which supports all key features of the modern domain name system.

Download

Releases

Version 2.2.1

Tuesday, May 24, 2016

Bugfixes:

  • Fix separate logging of server and zone events
  • Fix concurrent zone file flushing with many zones
  • Fix possible server crash with empty hostname on OpenWRT
  • Fix control timeout parsing ...
Open source

Open source

Knot DNS is open-­source. It is com­plete­ly free to down­load and use. The source code is avail­able un­der GPL li­cense. Our de­vel­op­ment process is trans­par­ent and driv­en by the needs of com­mu­ni­ty and do­nat­ing user­s.

Feature-packed

Feature-packed

Knot DNS pro­vides es­sen­tial DNS fea­tures in­clud­ing in­cre­men­tal zone trans­fers (IXFR), dy­nam­ic up­dates (DDNS) and re­sponse rate lim­it­ing (RRL). More ad­vanced fea­tures in­clude au­to­mat­ic DNSSEC sign­ing, dy­nam­ic A/AAAA/PTR records syn­the­sis, and rapid on-the-fly re­con­fig­u­ra­tion.

High performance

High performance

The serv­er was de­signed to meet the needs of root and TLD name server­s. It is ca­pa­ble of a non-stop op­er­a­tion. The re­spond­ing code is com­plete­ly lock­-free and the serv­er is there­fore ca­pa­ble of achiev­ing a very high re­sponse rate.

Secure and stable

Secure and stable

The code is be­ing con­stant­ly checked by an ex­ten­sive test­ing suite to at­tain sta­bil­i­ty, as­sure in­ter­op­er­abil­i­ty with oth­er DNS im­ple­men­ta­tion­s, avoid per­for­mance re­gres­sion­s, and cir­cum­vent pos­si­ble se­cu­ri­ty-re­lat­ed prob­lem­s.