The BIND 9 DNS Administration Reference Book is a convenient resource covering the tools and configurations for the ISC BIND 9 DNS software suite. BIND -- the most commonly-used DNS server on the Internet -- provides the named DNS server, a resolver library, and various tools for operating and verifying the DNS server and configurations. The BIND 9 implementation includes DNSSEC for signed zones, TSIG for signed DNS requests, IPv6, incremental zone transfers (IXFR), dynamic DNS, zone change notifications, EDNS0, multiple views, multi-processor support, and more. This printed book is based on a variety of open source documentation included with the BIND source code, including the definitive references for the configuration syntax and grammar and the usage of the BIND programs. New chapters and content were added, including many examples and detailed indexing and cross-referencing.