Introduction

The reader of this document is assumed to know the principles of Domain Name System.

What is Knot DNS

Knot DNS is a high-performance open source DNS server. It implements only authoritative domain name service. Knot DNS is best suited for use on TLD domains but can reliably serve any other zones as well.

Knot DNS benefits from its multi-threaded and mostly lock-free implementation which allows it to scale well on SMP systems and operate non-stop even when adding or removing zones.

Knot DNS features

Knot DNS supports the following DNS features:

• IN class and partially CH class
• TCP/UDP protocols
• AXFR, IXFR - master, slave
• TSIG
• EDNS0
• DNSSEC, including NSEC3
• NSID
• Dynamic updates
• Response Rate Limiting
• RR types A, NS, CNAME, SOA, PTR, HINFO, MINFO, MX, TXT, RP, AFSDB, RT, KEY, AAAA, LOC, SRV, NAPTR, KX, CERT, DNAME, APL, DS, SSHFP, IPSECKEY, RRSIG, NSEC, DNSKEY, DHCID, NSEC3, NSEC3PARAM, TLSA, SPF, NID, L32, L64, LP, EUI48, EUI64 and Unknown

Server features:

• Adding/removing zones on-the-fly
• Reconfiguring server instance on-the-fly
• IPv4 / IPv6 support
• Semantic checks of zones
• Persistent zone timers

For more info and downloads see www.knot-dns.cz.

Git repository: git://git.nic.cz/knot-dns.git

Knot DNS issue tracker: gitlab.labs.nic.cz/labs/knot/issues

Knot DNS users mailing list: knot-dns-users@lists.nic.cz

Scope of this document

This document covers the basic information on installing, configuring and troubleshooting the Knot DNS server.

License

Knot DNS is licensed under GNU General Public License version 3 or (at your option) any later version. The full text of the license is available in the COPYING file distributed with the source codes.