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 Improved Portability Architecture