named.conf.4 (2010 09)

n
named.conf(4) named.conf(4)
(BIND 9.3)
domain_name
A standard domain name. If domain_name does not end with a period (
.), it
is relative and the current origin is appended to it. If domain_name ends with
a period (
.), it is absolute.
blank If the first character of the record is blank, the previous owner_name is used.
ttl The Time to Live (TTL) of the RR. This field is a 32-bit integer in units of seconds and is
primarily used by resolvers when they cache RRs. The ttl defines how long a RR can be
cached before it should be discarded. See the Time to Live (TTL) and Time Specification
sections for more detail.
class A keyword, encoded as a 16-bit value, that identifies a protocol family or an instance of a
protocol. The following keywords are supported:
IN The Internet system, the default.
CH Chaosnet, a LAN protocol created at MIT in the mid-1970s. Rarely used for
its historical purpose, but reused for BIND’s built-in server information zones,
for example, version.bind.
HS Hesiod, an information service developed by MIT’s Project Athena. It is used
to share information about various systems databases, such as users, groups,
printers, and so on.
All records in a zone file must be of the same class.
type A keyword, encoded as a 16-bit value, that specifies the type of the resource in this
resource record. Types refer to abstract resources.
The following keywords are supported. Some of these listed, although not obsolete, are
experimental or historical and not in general use.
A Defines an IPv4 host address. In the IN class, this is a 32-bit IP address.
Described in RFC 1035.
A6 Defines an IPv6 host address. This can be a partial address (a suffix) and an
indirection to the name where the rest of the address (the prefix) can be found.
Experimental. Obsoleted/deprecated. Use
AAAA instead. Described in RFC
2874.
AAAA Defines an IPv6 address. Described in RFC 1886.
CERT Holds a digital certificate. Described in RFC 2538.
CNAME The canonical name of an alias. Described in RFC 1035.
DNAME Delegates reverse addresses. Replaces the domain name specified with
another name to be looked up. Described in RFC 2672.
GPOS Specifies the global position. Described in RFC 1712.
HINFO Identifies the CPU and OS used by a host. Described in RFC 1035.
KEY Stores a public key associated with a DNS name. Described in RFC 2535.
KX Identifies a key exchanger for this DNS name. Described in RFC 2230.
MX Identifies a mail exchange for the domain. A 16-bit preference value (lower is
better) followed by the host name of the mail exchange. See the MX Resource
Records section. Described in RFC 974 and RFC 1035.
NAPTR Name authority pointer. Described in RFC 2915.
NSAP A network service access point. Described in RFC 1706.
NS An authoritative name server for the domain. Described in RFC 1035.
NXT Used in DNSSEC to securely indicate that RRs with an owner name in a cer-
tain name interval do not exist in a zone and indicate what RR types are
present for an existing name. Described in RFC 2535.
PTR Domain name pointer. A pointer to another part of the domain name space.
Often user to associate an IP address with a domain name. Described in RFC
1035.
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