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SonicOS 5.8.1 Administrator Guide
CHAPTER 29
Chapter 29: Configuring Dynamic DNS
Network > Dynamic DNS
Dynamic DNS (DDNS) is a service provided by various companies and organizations that
allows for dynamic changing IP addresses to automatically update DNS records without manual
intervention. This service allows for network access using domain names rather than IP
addresses, even when the target’s IP addresses change. For example, is a user has a DSL
connection with a dynamically assigned IP address from the ISP, the user can use DDNS to
register the IP address, and any subsequent address changes, with a DDNS service provider
so that external hosts can reach it using an unchanging domain name.
Dynamic DNS implementations change from one service provider to another. There is no strict
standard for the method of communication, for the types of records that can be registered, or
for the types of services that can be offered. Some providers offer premium versions of their
services, as well, for a fee. As such, supporting a particular DDNS provider requires explicit
interoperability with that provider's specific implementation.
Most providers strongly prefer that DDNS records only be updated when IP address changes
occur. Frequent updates, particularly when the registered IP address is unchanged, may be
considered abuse by providers, and could result in your DDNS account getting locked out.
Please refer to the use policies posted on the provider's pages, and abide by the guidelines.
SonicWALL does not provide technical support for DDNS providers - the providers themselves
must be contacted.