Dynamic DNS

Dynamic DNS (DDNS) is a method of automatically updating a name server in the Domain Name System (DNS), often in real time, with the active DDNS configuration of its configured hostnames, addresses or other information.

The term is used to describe two different concepts. The first is "dynamic DNS updating" which refers to systems that are used to update traditional DNS records without manual editing.^[1] These mechanisms use TSIG to provide security. The second kind of dynamic DNS permits lightweight and immediate updates often using an update client, which do not use the RFC 2136 standard for updating DNS records. These clients provide a persistent addressing method for devices that change their location, configuration or IP address frequently.

^ S. Thomson; Y. Rekhter; J. Bound (April 1997). P. Vixie (ed.). Dynamic Updates in the Domain Name System (DNS UPDATE). Network Working Group. doi:10.17487/RFC2136. RFC 2136. Proposed Standard. Updates RFC 1035. Updated by RFC 3007, 4033, 4034 and 4035.

[rfc2136-1] S. Thomson; Y. Rekhter; J. Bound (April 1997). P. Vixie (ed.). Dynamic Updates in the Domain Name System (DNS UPDATE). Network Working Group. doi:10.17487/RFC2136. RFC 2136. Proposed Standard. Updates RFC 1035. Updated by RFC 3007, 4033, 4034 and 4035.

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