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dnscheck is a simple to use DNS zone sanity checker, comparing name server records and serial numbers with both the parent zone and the zone itself. It allows you to find lame, leaked or stale name servers which have the potential to cause disruption.

The dnsproxy daemon is a proxy for DNS queries. It forwards these queries to two previously configured nameservers: one for authoritative queries and another for recursive queries. The received answers are sent back to the client unchanged. No local caching is done.

adsuck is a DNS relay that returns NXdomain for hosts that match names in a blacklist for quick and non browser plugin based ad blocking.

AnyEvent::CacheDNS provides a very simple DNS resolver that caches its results and can improve the connection times to remote hosts.

This is Net::Bonjour, a set of perl modules to utilize DNS for service discovery. This method of service discovery is branded as Bonjour by Apple Computer.

BIND version 9 is a major rewrite of nearly all aspects of the underlying BIND architecture. Some of the important features of BIND 9 are: DNS Security: DNSSEC (signed zones), TSIG (signed DNS requests) IP version 6: Answers DNS queries on IPv6 sockets, IPv6 resource records (AAAA) Experimental IPv6 Resolver Library DNS Protocol Enhancements: IXFR, DDNS, Notify, EDNS0 Improved standards conformance Views: One server process can provide multiple "views" of the DNS namespace, e.g. an "inside" view to certain clients, and an "outside" view to others. Multiprocessor Support BIND 9.9 includes a number of changes from BIND 9.8 and earlier releases, including: NXDOMAIN redirection Improved startup and reconfiguration time, especially with large numbers of authoritative zones New "inline-signing" option, allows named to sign zones completely transparently, including static zones Many other new features, especially for DNSSEC See the CHANGES file for more information on features.

Router Advertisement DNS (radns) radns is an IPv6 DNS server address autoconfiguration client. It listens for IPv6 Router Advertisements with the Recursive DNS Server (RDNSS) and the DNS Search List (DNSSL) options and stores the search list and address(es) in a file in the same syntax as resolv.conf(5).

UDNS is a stub DNS resolver library with ability to perform both synchronous and asynchronous DNS queries.

An experiment in benchmarking DNS name services. This tool is designed to help you as a user determine what name services are the best to use for an individual machine.

DJBDNS is a collection of Domain Name System tools. It includes several components: * The dnscache program is a local DNS cache. It accepts recursive DNS queries from local clients such as web browsers. It collects responses from remote DNS servers. * The tinydns program is a fast, UDP-only DNS server. It makes local DNS information available to the Internet. * The pickdns program is a load-balancing DNS server. It points clients to a dynamic selection of IP addresses. * The walldns program is a reverse DNS wall. It provides matching reverse and forward records while hiding local host information. * The dns library handles outgoing and incoming DNS packets. It can be used by clients such as web browsers to look up host addresses, host names, MX records, etc. It supports asynchronous resolution. * The dnsfilter program is a parallel IP-address-to-host-name converter. * The dnsip, dnsipq, dnsname, dnstxt, and dnsmx programs are simple command-line interfaces to DNS. * The dnsq and dnstrace programs are DNS debugging tools. Documentation is at the website below,