PowerDNS - DNS resolver

PowerDNS is a DNS server which helps to resolve the name server. It supports geographic load balancing and failover. It stores zone information to relational database and BIND style file.

It consist of two parts: the Authoritative Server and the Recursor. The Authoritative Server will answer questions about domains it knows about, but will not go out on the net to resolve queries about other domains. The Recursor, conversely, by default has no knowledge of domains itself, but will always consult other authoritative servers to answer questions given to it.