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 9.8 includes a number of changes from BIND 9.7 and earlier releases, including: Preliminary DNS64 support (AAAA synthesis only initially) See the CHANGES file for more information on features. WWW: https://www.isc.org/software/bind