DNS records

(redirected from AAAA record)

DNS records

A DNS server is configured with a "zone file" for each domain that contains "resource records." There are several types of records, and the most common are described below. See DNS.

Forward DNS and Reverse DNS (A and PTR)
The Address (A) record associates a domain name with an IP address, which is the primary purpose of the DNS system. The Pointer (PTR) record provides data for reverse DNS, which is used for logging the domain name and verification purposes. Also called "inverse DNS," the PTR record is an option. See reverse DNS.

Aliasing Names (CNAME)
The Canonical Name (CNAME) record is used to create aliases that point to other names. It is commonly used to map WWW, FTP and MAIL subdomains to a domain name; for example, a CNAME record can associate the subdomain FTP.COMPUTERLANGUAGE.COM with COMPUTERLANGUAGE.COM.

DNS Name Servers (NS)
The Name Server (NS) record identifies the authoritative DNS servers for a domain. A second name server is required for redundancy, and two NS records must be in the zone file (one for the primary; one for the secondary). The secondary server queries the primary server for changes.

Mail Servers (MX)
The Mail Exchange (MX) record identifies the server to which e-mail is directed. It also contains a priority field so that mail can be directed to multiple servers in a prescribed order.

Text Record (TXT)
A TXT record can be used for any kind of documentation. It is also used to provide information to the SPF e-mail authentication system. See SPF.

First Record in File (SOA)
Start of Authority (SOA) is the first record in the zone file. It contains the name of the primary DNS server, which must correspond to an NS record in the file, the administrator's e-mail address and the length of time records can be cached before going back to the authoritative DNS server.

The SOA also includes data for the secondary DNS server such as the date of last update (the "Serial Number") and time intervals for checking the domain.
SUMMARY OF COMMON ZONE FILE RECORDSRecord Name (purpose) Associate This to ThatSOA record (1st record)

 TXT record (documentation)

 CNAME record (aliases)
  associate an alias to a domain

 DNAME record (aliases)
  associate an alias to a subdomain

 MX record (mail server)
  associate mail to a mail server

 NS record (authoritative server)
  associate a domain to a DNS server

 A record (forward DNS - IPv4)
  associate subdomain to 32-bit IP

 AAAA record (forward DNS - IPv6)
  (1st IPv6 record)
  associate subdomain to 128-bit IP

 A6 record (forward DNS - IPv6)
  (future IPv6 record)
  associate subdomain to 128-bit IP

 PTR record (reverse DNS)
  associate IP address to a subdomain
References in periodicals archive ?
HC panel also supports IPv6 addresses for Name based and IP based websites, provisioning of AAAA record in DNS Manager and database connectivity using IPv6.
DNS64 - Allows the resolution of addresses from IPv4-only networks for IPv6-only clients by creating synthesized IPv6 AAAA records for hosts where no AAAA record is available.
Some versions of desktop operating systems will make AAAA record queries regardless of whether they have an IPv6 connection or not.
Implement -- Deploy IPv6-enabled DNS hosts and create the necessary IPv6 AAAA records and corresponding NAPTR records alongside existing IPv4 DNS data.
Support for IPV6: As cyber criminals turn to new frontiers for infection, Damballa is leading the industry with detection for IPV6-based threats and full support for AAAA records.
Since October 2007 Go Daddy has completed a number of IPv6 related initiatives, including support for IPv6 AAAA records, Glue records, Dual Stack DNS for customers' domain names and enabling redundant IPv6 transit from multiple providers.
Critical Infoblox IPv6 capabilities include AAAA records for DNS resolution, dual-stack IPv4 and IPv6 IP address management from a single interface, task delegation and automation for complex addressing tasks, IP discovery and network inventory for IPv6 address planning, automated IPv6 network change and configuration management to ensure the IPv6 network is secure and compliant.
Critical Infoblox IPv6 capabilities include AAAA records for DNS resolution, dual stack IPv4 and IPv6 IP address management from a single interface, task delegation and automation for complex addressing tasks, IP discovery and network inventory for IPv6 address planning, automated IPv6 network change and configuration management to ensure IPv6 network is secure and compliant, and more.
gov, and complete IPv6 support for AAAA records, BlueCat's Proteus is already the IPAM solution of choice for organizations looking to simplify the migration to IPv6 and then manage all IPv6 addresses from a single, secure user interface - and bringing Silvia Hagen on board will ensure BlueCat remains the IPv6 leader.