PowerDNS

PowerDNS Server

Original author(s)	PowerDNS.COM BV
Developer(s)	PowerDNS Community, Bert Hubert
Stable release	4.0.3 / January 17, 2017 (2017-01-17)
Repository	github.com/PowerDNS/pdns
Written in	C++
Operating system	Unix-like
Type	DNS server
License	GNU General Public License v2
Website	www.powerdns.com

PowerDNS is a DNS server, written in C++ and licensed under the GPL. It runs on most Unix derivatives. PowerDNS features a large number of different backends ranging from simple BIND style zonefiles to relational databases and load balancing/failover algorithms. A DNS recursor is provided as a separate program.

PowerDNS was originally a commercial proprietary product. In November 2002, the source code was made public under the open-source GPL v2 license. In 2013, its performance serving ENUM records was compared against three other DNS servers.

PowerDNS Authoritative Server (pdns_server) consists of a single core, and multiple dynamically loadable backends that run multi-threaded. The core handles all packet processing and DNS intelligence, while one or more backends deliver DNS records using arbitrary storage methods.

Zone transfers and update notifications are supported, and the processes can run unprivileged and chrooted. Various caches are maintained to speed up query processing. Run-time control is available through the pdns_control command, which allows reloading of separate zones, cache purges, zone notifications and dumps statistics in Multi Router Traffic Grapher / rrdtool format. Realtime information can also be obtained through the optional built-in web server.