DNS/DHCP Management Console

Types of Resource Record

A Resource Record (RR) contains data associated with domain names. This data is represented by and is subordinate to the Resource Record Set (RR Set) of a zone container.

You can create the following types of Resource Records.

A6

A6 records can specify a complete IPv6 address or only a part of it, such as the last 64 bits assigned to a host's network interface, and then refer to the remainder
of the address by a symbolic domain name. The part of the address specified in this record is called Address Suffix.

This record has prefix information required to build the complete IPv6 address. Prefix information comprises a prefix length and a DNS name which is in turn the owner of one or more A6 records.

If you select this option, you must specify the following:

For more details about A6 record, see RFC 2874.

A

Maps a domain name to an IPv4 address. To create an A record, you must specify the IPv4 address that is associated with the domain name.

For more details about A record, see RFC 1035.

AAAA

Maps a domain name to an IPv6 address . To create an AAAA record , you must specify the IPv6 address that is associated with the domain name.

For more details about AAAA record, see RFC1886.

AFSDB

The AFS system uses the DNS to map from a domain name to the name of an AFS cell database server or Open Group's Distributed Computing Environment (DCE) cell's authenticated name server. It contains the following data:

For more details about AFSDB record, see RFC1183.

CNAME

Specifies the canonical or primary name for the owner. The owner name is the alias name given to the primary name.
To create a CNAME record, enter the alias in the owner name field and the primary name in the domain name of the aliased host field.

DNAME

A DNAME-record is used to map or rename an entire sub-tree of the DNS name space to another domain. It differs from the CNAME-record which maps only a single node (leaf or terminal node) of the name space. DNAME resource record is useful when an organization renaming or network renumbering occurs. The transition can be done easily using DNAME resource records.

To create a DNAME record, specify the domain name to be renamed in the owner name field and the domain name to which it is to be renamed in the target domain name field.

For more details about DNAME record, see RFC 2672.

HINFO

A HINFO-record maps a host domain name to its CPU and operating system type.

This information can be used by application protocols such as FTP, which use special procedures when communicating with computers of a known CPU and operating system type. HINFO record has the following RDATA fields:

Standard CPU types can be found at http://www.iana.org/assignments/machine-names
Standard operating system types can be found at http://www.iana.org/assignments/operating-system-names

For more details about HINFO record, see RFC1035.

ISDN

Integrated Service Digital Network (ISDN) resource record maps a domain name to an ISDN telephone number.
To create an ISDN record, enter the following fields:

For more details about ISDN record, see RFC1183.

LOC

This resource record provides capability to specify the location information of computers, subnets, and networks in the globe. This record has the following fields:

For more details about LOC record, see RFC 1876.
To get the latitude and longitude information of a particular location, visit http://www.ckdhr.com/dns-loc/finding.html
For useful links and utilities to create LOC records, visit http://www.ckdhr.com/dns-loc

MB

Lists the machine where a user wants to receive mails.
To create an MB record, specify the user's login name in the owner name field, and the domain name of the mailbox address and the domain name of the machine to which mails for this user will be delivered in the mailbox address domain name field.

For more details about MB record, see RFC 1035.

MG

Specifies the mail group members (one MG-record per member).
To create an MG record, specify the mail group name in the owner name field, and email address of the mail group member (with the '@' symbol replaced by '.') in the mail group member domain name.

MINFO

MINFO record is generally used to create a mail group for a mailing list.
To create an MINFO record, enter the name of the mail group in the owner name field. This record has the following fields:

MR

A domain name that specifies the mailbox that is the proper rename of the specified mailbox.

MX

MX records identifies mail servers responsible for a domain name.
To create an MX record, enter the domain name to which you want to create an MX record in the owner name field. You must specify the following fields:

For more information about MX record, see RFC 1035.

NS

NS-records identify the DNS servers responsible (authoritative) for a zone. A zone should contain one NS-record for each DNS servers (primary and secondary) managing this zone. This record is used for zone transfer purposes (notify) and in domain delegation.
To create an NS record, enter the domain name in the owner name field and the domain name of the server in the DNS Server domain name field.

For more details about NS record see RFC1035.

PTR

Generally PTR record is used to  map a host's IP address to its domain name. Its functionality is the reverse of an A record. A PTR record can also be used to point  a domain name to another domain name. The later usage of PTR record is generally required for achieving classless in-addr.arpa delegation.
To create a PTR record for  mapping  a host IP address to its domain name,  enter the host id part of IP address in reverse order  in the editable part of  owner name field. Fill host name and domain name fields with the corresponding values form domain name of the host.

To create a PTR record for mapping one domain name to another domain name, enter the domain name which points to another domain name in owner name field (you may need to enter only part of it as zone name part of it is already filled in). Fill host name and domain name fields with the corresponding values from domain name pointed by owner name. 

For more details about PTR record, see RFC1035.

PX

Contains X.400 mail mapping information with the following parameters:

For more details about PX record, see RFC2163.

RP

Specifies the mailbox of the person responsible for the host or domain name. The SOA record of a zone defines the person responsible for the entire zone, but a zone might contain a large number of individual hosts or domain names for which different people are assigned responsibility. The RP-record type makes it possible to identify the responsible person for individual domain names contained within the zone.

To create an RP record, enter the host or domain name to which you want to assign a responsible person in the owner name field.

RP record has the following fields:

For more details about RP record, see RFC1183.

RT

Specifies an intermediate host that provides routing to the domain name (host) of the record. This can be used by computers which are not directly connected to the Internet or wide area network WAN).

SRV

Specifies the location of services with the following parameters:

For more details about SRV record, see RFC 2782.

TXT

TXT-records are used to hold descriptive text that contains general information about a domain name such as who is hosting it, contact person, phone numbers, etc. These records are informational for people and are not required for any DNS functions. The RDATA field for this record can be used to enter descriptive text.

For more details about TXT record, see RFC1035.

WKS

Specifies the well-known services available on a host using a given protocol. This record has three RDATA fields: IP Address, protocol, and available services. IP address and protocol specifies the address and protocol on which one or more services are available. Available services lists all the services available on a host using the above IP address and protocol.

X25

Specifies a PSDN (Public Switched Data Network) address.
An X25-records maps a domain name to a PSDN address number. This record has one RDATA field PSDN address. It identifies the PSDN address associated with the owner name. The <PSDN-address> is a string of decimal digits, beginning with the 4 digit Data Network Identification Code (DNIC), as specified in the X.121 numbering plan.

For more details about X25 record, see RFC 1183.


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