BIND9. BIND4 and BIND8 are now technically obsolete and not considered in this article. BIND9 is a ground-up rewrite of BIND featuring complete DNSSEC support in addition to other features and enhancements. Internet Systems Consortium started development of a new version, BIND 10. Its first release was in April 2010, but ISC involvement concluded with the release of BIND 10 version 1.2 in April 2014. ISC cited a lack of resources to continue development of BIND 10, and they reaffirmed their commitment to BIND9. The BIND 10 codebase continues on as an open source project. It is not included in this comparison at this time. Cisco Network Registrar CNR includes a commercial DNS server from Cisco Systems usually used in conjunction with the CNR DHCP (Dynamic Host Configuration Protocol) server. It supports high rates of dynamic update. CoreDNS CoreDNS is the recommended DNS server for Kubernetes and graduated from the CNCF in 2019. Dnsmasq Dnsmasq is a lightweight, easy to configure DNS forwarder, designed to provide DNS (and optionally DHCP and TFTP) services to a small-scale network. It can serve the names of local machines which are not in the global DNS. Dnsmasq accepts DNS queries and either answers them from a small, local cache or forwards them to a real, recursive DNS server. It loads the contents of /etc/hosts, so that local host names which do not appear in the global DNS can be resolved. djbdns Djbdns is a collection of DNS applications, including tinydns, which was the second most used free software DNS server in 2004. It was designed by Daniel J. Bernstein, author of qmail, with an emphasis on security considerations. In March 2009, Bernstein paid $1000 to the first person finding a security hole in djbdns. The source code is not centrally maintained and was released into the public domain in 2007. As of March 2009, there are three forks and more than a dozen patches to add additional features to djbdns. gdnsd gdnsd is a DNS server designed for geographic balancing. gdnsd is the DNS server used by Wikipedia for its servers and networking. Knot DNS Knot DNS is a free software authoritative DNS server by CZ.NIC. Knot DNS aims to be a fast, resilient DNS server usable for infrastructure (root and TLD) and DNS hosting services. Knot DNS supports DNSSEC signing and among others hosts root zone (B, K, and L root name servers),