.. include:: /globals.rst

Zone
----

A DNS zone with all the records it contains.

  .. image:: images/dns-zone.png
     :alt: Edition of a DNS Zone object

Zone
^^^^

.. image:: images/dnszone-dnszone-main.png
   :alt: Screenshot of section Zone of tab DNS zone of type DNS zone

* Base: Object base
* Zone name: Zone name
* Reverse zones: Reverse zones for this zone in the form xx.xx.in-addr.arpa. or x.x.ip6.arpa.

SOA record
^^^^^^^^^^

.. image:: images/dnszone-dnszone-soa.png
   :alt: Screenshot of section SOA record of tab DNS zone of type DNS zone

* Primary DNS server: Domain name of the name server that was the original or primary source of data for this zone
* Mail address: Domain name which specifies the mailbox of the person responsible for this zone
* Serial number: Version number of the original copy of the zone
* Refresh: Time interval before the zone should be refreshed
* Retry: Time interval that should elapse before a failed refresh should be retried
* Expire: Time value that specifies the upper limit on the time interval that can elapse before the zone is no longer authoritative
* TTL: Minimum TTL field that should be exported with any RR from this zone

Records
^^^^^^^

.. image:: images/dnszone-dnszone-records.png
   :alt: Screenshot of section Records of tab DNS zone of type DNS zone

The DNS records for this zone

Supported record types:

A
+

IPv4 address record.

.. image:: images/dnsrecord-A.png
   :alt: Screenshot of record type A

AAAA
++++

IPv6 address record.

.. image:: images/dnsrecord-AAAA.png
   :alt: Screenshot of record type AAAA

AFSDB
+++++

Location of database servers of an AFS cell.

.. image:: images/dnsrecord-AFSDB.png
   :alt: Screenshot of record type AFSDB

CERT
++++

Certificate record.

.. image:: images/dnsrecord-CERT.png
   :alt: Screenshot of record type CERT

CNAME
+++++

Alias of one name to another: the DNS lookup will continue by retrying the lookup with the new name.

.. image:: images/dnsrecord-CNAME.png
   :alt: Screenshot of record type CNAME

DS
++

The record used to identify the DNSSEC signing key of a delegated zone.

.. image:: images/dnsrecord-DS.png
   :alt: Screenshot of record type DS

KEY
+++

Key record.

.. image:: images/dnsrecord-KEY.png
   :alt: Screenshot of record type KEY

KX
++

Key exchanger record.

.. image:: images/dnsrecord-KX.png
   :alt: Screenshot of record type KX

LOC
+++

Location record, specifies a geographical location associated with a domain name.

.. image:: images/dnsrecord-LOC.png
   :alt: Screenshot of record type LOC

MX
++

Mail exchange record, maps a domain name to a list of message transfer agents for that domain.

.. image:: images/dnsrecord-MX.png
   :alt: Screenshot of record type MX

NAPTR
+++++

Naming authority pointer, allows regular-expression-based rewriting of domain names.

.. image:: images/dnsrecord-NAPTR.png
   :alt: Screenshot of record type NAPTR

NS
++

Name server record, delegates a DNS zone to use the given authoritative name servers.

.. image:: images/dnsrecord-NS.png
   :alt: Screenshot of record type NS

NSEC
++++

Next secure record, part of DNSSEC, used to prove a name does not exist.

.. image:: images/dnsrecord-NSEC.png
   :alt: Screenshot of record type NSEC

PTR
+++

Pointer to a canonical name. The most common use is for implementing reverse DNS lookups.

.. image:: images/dnsrecord-PTR.png
   :alt: Screenshot of record type PTR

RRSIG
+++++

Signature for a DNSSEC-secured record set.

.. image:: images/dnsrecord-RRSIG.png
   :alt: Screenshot of record type RRSIG

SIG
+++

Signature record (replaced by RRSIG for DNSSEC).

.. image:: images/dnsrecord-SIG.png
   :alt: Screenshot of record type SIG

SRV
+++

Generalized service location record, used for newer protocols instead of creating protocol-specific records such as MX.

.. image:: images/dnsrecord-SRV.png
   :alt: Screenshot of record type SRV

SSHFP
+++++

Resource record for publishing SSH public host key fingerprints in the DNS System, in order to aid in verifying the authenticity of the host.

.. image:: images/dnsrecord-SSHFP.png
   :alt: Screenshot of record type SSHFP

TXT
+++

Text record, originally for arbitrary human-readable text in a DNS record. Since the early 1990s, however, this record more often carries machine-readable data.

.. image:: images/dnsrecord-TXT.png
   :alt: Screenshot of record type TXT
