Dynamic DNS

DD-WRT NXT has presets for several Dynamic DNS providers:

• dyndns.org
• changeip.com
• he.net
• no-ip.com

If your provider is not listed, you can also use “Custom Configuration” and a custom update URL(most providers will provide those to users).

For the Custom Update URL, you can inject the needed informations from the input fields as following:

Example (pure fictional example URL):

http://[USERNAME]:[PASSWORD]@testuser123.org/update.cgi?hostname=[DOMAIN]&myip=[IP]

Where the following parts of the URL will be replaced during the request with the according fields:

• [USERNAME] will be replaced with the value of the “Username” field
• [PASSWORD] will be replaced with the value of the “Password” field
• [DOMAIN] will be replaced with the value of the “Domain” field
• [IP] will be replaced with Value, according to the “Check IP at” settings (described below)

The setting of this field will change which IP will be passed to your Dynamic DNS provider for Custom or other providers.

• WAN - The WAN IP-Address of the router will be passed to the DNS Provider as your outbound IP (this may only be the case for DSL Modems)
• Internet - The outbound IP-Address as for the checkip.dyndns.com API (works for Modems as well as Routers)

• Verify - The configured Domain will be verified to match the IP from “Check IP at” every N minutes
• Refresh - The Update will be performed every N hours defined here