Bind 9 Administrator Reference Manual

Chapter 6. BIND 9 Conﬁguration Reference

hint The initial set of root nameservers is speciﬁed using a "hint zone". When

the server starts up, it uses the root hints to ﬁnd a root nameserver and get

the most recent list of root nameservers. If no hint zone is speciﬁed for class

IN, the server uses a compiled-in default set of root servers hints. Classes

other than IN have no built-in defaults hints.

6.2.22.2. Class

The zone’s name may optionally be followed by a class. If a class is not speciﬁed, class IN (for

Internet), is assumed. This is correct for the vast majority of cases.

The hesiod class is named for an information service from MIT’s Project Athena. It is used to share

information about various systems databases, such as users, groups, printers and so on. The keyword HS

is a synonym for hesiod.

Another MIT development is CHAOSnet, a LAN protocol created in the mid-1970s. Zone data for it can

be speciﬁed with the CHAOS class.

6.2.22.3. Zone Options

allow-notify

See the description of allow-notify in Section 6.2.14.3

allow-query

See the description of allow-query in Section 6.2.14.3

allow-transfer

See the description of allow-transfer in Section 6.2.14.3.

allow-update

Speciﬁes which hosts are allowed to submit Dynamic DNS updates for master zones. The default is

to deny updates from all hosts.

update-policy

Speciﬁes a "Simple Secure Update" policy. See Section 6.2.22.4.