Dynamic DNS is a function which allows you to have a private domain linked to a dynamic IP address. Periodically, as the IP address changes, a client module updates the binding between the domain name and IP address. In simple terms, Dynamic DNS allows you to have your own domain (or subdomain), and keep track of what its IP address is on a regular basis.

This allows you to access your network device and its services from anywhere on the Internet, since you never have to know your device's (changing) IP adddress. FreshTomato includes built-in DDNS clients for the most common DDNS providers.

IP Address: In this section, you select which IP address to bind to the domain address.

• Use WAN0 IP Address (YourWAN0Address)
  WAN0 is the default, or you can choose one of the custom choices below.

• Use WAN1 IP Address (Your WAN1Address)

• Use WAN2 IP Address (YourWAN2Address)

• Use WAN3 IP Address (Your WAN3Address)

• Use External IP Address Checker
  This is helpful If your device doesn't have a public IP address.
  When selected, this runs every 10 minutes.

• Offline 0.0.0.0
  Sets the domain unreachable and points it to IP address 0.0.0.0

• Offline 10.1.1.1
  Sets the domain unreachable and points it to IP address 10.1.1.1

• Custom IP
  Here, you can set the DDNS domain to anything you want. However, this method is not dynamic.
  

Auto refresh every defines how often the domain to IP mapping should be reconfirmed, even if the IP hasn't changed.

You can configure up to two different DDNS domains. The only limitation is that they will both be mapped to the same IP, as defined above.

Service: identifies the first built-in DDNS provider. If your provider isn't listed, you might try the Custom URL.Other options include trying DNS-O-MATIC or simply changing providers.

URL: is the address of the first DDNS provider, for better identification. Based on the Provider selected, you will see different fields, like username/password/token/hostname etcetera.

Force next update: This triggers an update as soon as you click Save. Note that some providers have a limitation on how many updates you can perform in a given period. If you perform too many updates your domain/account might get temporarily blocked.

Last IP Address: Provides you with the last IP address the DDNS client used to send the update.

Last result: Performs a basic diagnostic to indicate if your configuration/account are correct. Since you can map only one IP address, this page is currently not MultiWAN-aware.

Service: identifies the second built-in DDNS provider to be used. If your provider isn't listed, you might try the Custom URL.Other options include trying DNS-O-MATIC or simply changing providers.

URL: is the address of the second DDNS provider, for better identification. Based on the Provider selected, you will see different fields, like username/password/token/hostname etcetera.

Force next update: This triggers an update as soon as you click Save. Note that some providers have a limitation on how many updates you can perform in a given period. If you perform too many updates your domain/account might get temporarily blocked.

Last IP Address: Provides you with the last IP address the second DDNS client used to send the update.

Last result: Performs a basic diagnostic to indicate if your configuration/account are correct. Since you can map only one IP address, this page is currently not MultiWAN-aware.