RFC 2136 dynamic DNS update

The standardized method of dynamically updating nameserver records is prescribed by RFC 2136, commonly known as 'Dynamic DNS Update' or 'DDNS'. Unlike updates through a DDNS provider, RFC 2136 is a protocol in its own right, with its own security mechanisms, and for use with managed nameservers.

While RFC 2136 supports all DNS record types (including zone and user), it is most commonly used for dynamic hosts. In this form it is used primarily as an extension of the DHCP system, and in which the authorized DHCP servers register the clients' records with the nameserver(s) (Windows servers are an exception: by default, Windows servers only register 'A' records and the DHCP clients are expected to register the reverse pointers).

This form of support for RFC 2136 is provided by a plethora of client and server software, including those that are components of most current operating systems. Support for RFC 2136 is also an integral part of many directory services, including LDAP and Windows' Active Directory domains.

December 29, 2011

Continue