BIND:suite for interacting with the Domain Name System (DNS)

BIND is a software suite for interacting with the Domain Name System (DNS). As of 2015, it is the most widely used domain name server software and is the de facto standard on Unix-like operating systems. Its most prominent component, named (pronounced name-dee: /ˈneɪmdiː/, short for name daemon), performs both of the primary DNS server roles, acting as an authoritative name server for DNS zones and as a recursive resolver in the network. Also contained in the suite are various administration tools, such as nsupdate and dig, and a DNS resolver interface library.

BIND 9 is intended to comply fully with the IETF DNS and draft standards. Essential features of BIND 9 include TSIG, nsupdate, IPv6, RNDC (remote name daemon control), views, multiprocessor support, Response Rate Limiting (RRL), DNSSEC, and broad portability. RNDC enables remote configuration updates, using a shared secret to provide encryption for local and remote terminals during each session.

While earlier versions of BIND offered no mechanism to store and retrieve zone data in anything other than flat text files, in 2007, BIND 9.4 DLZ provided a compile-time option for zone storage in a variety of database formats including LDAP, Berkeley DB, PostgreSQL, MySQL, and ODBC.

BIND 10 planned to make the data store modular so that a variety of databases may be connected. In 2016 ISC added support for the 'dyndb' interface, contributed by RedHat, with the BIND version.

Security issues discovered in BIND 9 are patched and publicly disclosed in keeping with standard principles of open-source software. A complete list of security defects discovered and revealed in BIND9 is maintained by Internet Systems Consortium, the current authors of the software.

The BIND 4 and BIND 8 releases both had serious security vulnerabilities. Use of these ancient versions or any un-maintained, non-supported version is strongly discouraged.BIND 9 was a complete rewrite to mitigate these ongoing security issues. The downloads page on the ISC website clearly shows which versions are currently maintained and which are end-of-life.

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