DNS Tutorial part 1 - DNS Basics

DNS Tutorial part 2 - DNS Advanced (coming soon)

DNS Tutorial part 3 - DNS power tools (coming soon)

Operating Status

Q & A

DNS related links

Internet organizations

The global coordination of the DNS Root, IP addressing, and other Internet protocol resources is performed as the Internet Assigned Numbers Authority (IANA) functions.

The Root Hints and the Root zone trust anchor files
The root zone database contains all existing top level domains

Internet Corporation for Assigned Names and Numbers is a nonprofit organization responsible for the coordination and maintenance of the Internet namespace and the numerical spaces of the Internet.

ICANN Acronyms and Terms
A Web front ent to the ICANN WHOIS database

The Internet Engineering Task Force is an open standards organization, which develops and promotes voluntary Internet standards, in particular standards that comprise the Internet protocol suite (TCP/IP).

RFC Search page
RFC Index

The Internet Society (ISOC) is an American nonprofit organization founded in 1992 to provide leadership in Internet-related standards, education, access, and policy. Its mission is "to promote the open development, evolution and use of the Internet for the benefit of all people throughout the world".

History of the Internet

There are many told and untold stories about the history of the Internet. Here is our favorite:

Brief History of the Internet courtesy of the Internet Society.

DNS and related open source software

This list contains only DNS software with full documented support of IPv6 and DNSSEC.

Authoritative DNS software

The original DNS software and still the most implemented DNS software on the Internet. Continuously developed and maintained by ISC. The BIND software can be configured to run as both an authoritative server and as a caching resolver with DNSSEC validation.

PowerDNS Authoritative server is a flexible open source software. It enables the use of a variety of backend databases, allows scripting DNS answers to be used for dynamic redirections and filtering.

NSD is a fast and reliable authoritative-only name server software with lots of security features provided by NLNetLabs. It strives to be a reference implementation for emerging IETF standards.

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

YADIFA is an authoritative-only name server implementation developed from scratch by .EU. It's clean, small, light and RFC compliant.

Recursive and caching

The Knot Resolver is a caching full resolver implementation, including both a resolver library and a daemon.

Unbound is a validating, recursive, caching DNS resolver. It is designed to be fast and lean and incorporates modern features based on open standards.

The PowerDNS Recursor is a high-end, high-performance resolving name server which powers the DNS resolution of at least a hundred million subscribers.

DNS related

OpenDNSSEC is a policy-based zone signer that automates the process of keeping track of DNSSEC keys and the signing of zones.

dnsdist is a highly DNS-, DoS- and abuse-aware loadbalancer. Its goal in life is to route traffic to the best server, delivering top performance to legitimate users while shunting or blocking abusive traffic.