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SONICWALL SONICOS STANDARD 3.0 ADMINISTRATOR’S GUIDE
103
Network > Dynamic DNS
C
HAPTER
16
Chapter 16: 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.
Supported DDNS Providers
Not all services and features from all providers are supported, and the list of supported providers is
subject to change. SonicOS 3.0 currently supports the following services from four Dynamic DNS
providers:
• Dyndns.org <http://www.dyndns.org> - SonicOS requires a username, password, Mail Exchanger,
and Backup MX to configure DDNS from Dyndns.org.
• Changeip.com <http://www.changeip.com> - A single, traditional Dynamic DNS service requiring
only username, password, and domain name for SonicOS configuration.
•No-ip.com <http://www.no-ip.com> - Dynamic DNS service requiring only username, password,
and domain name for SonicOS configuration. Also supports hostname grouping.
• Yi.org <http://www.yi.org> - Dynamic DNS service requiring only username, password, and
domain name for SonicOS configuration. Requires that an RR record be created on the yi.org
administrative page for dynamic updates to occur properly.