extremely powerful and versatile nameserver

 PowerDNS is a versatile nameserver which supports a large number
 of different backends ranging from simple zonefiles to relational
 databases and load balancing/failover algorithms.
 PowerDNS tries to emphasize speed and security.
 .
 This is the authoritative nameserver that answers questions about
 domains that it knows about. You also need at least one backend installed to
 serve data.