"Introduced in BIND version 8 and refined in BIND version 9, the nsupdate utility provides the system administrator or casual user with a quick and painless method of updating a DNS zone, adding or deleting any type of DNS record the name server supports.
"Looking again at dynamic DNS (DDNS), we now turn to setting up dynamic DNS on your BIND named name server, discussing some of the available security policies, and providing some examples of use. For directions on actually performing dynamic DNS updates from a remote client, read the companion article on nsupdate..."
