It specifies a DDNS service provider. The supported service providers 
include no-ip.com, 3322.org, dyndns.org, 88ip.cn, and oray.com. 
It specifies the user name registered on a DDNS service provider's 
website for logging in to the DDNS service. 
It specifies the password registered on a DDNS service provider's website 
for logging in to the DDNS service. 
 
Application Scenario 
An AC18 is used to set up a network at an apartment and must be managed remotely using a 
web browser. This requirement can be addressed by combining the remote management and 
DDNS functions. Assume that the registered domain name is tenda.dyndns.org, the user 
name is Tenda, and the password is 1234578. 
The following figure shows the application scenario. 
 
 
Configuration 
Step 1  Enable the DDNS function. 
1.  Set DDNS to the    state. 
2.  Set Service Provider to dyndns.org. 
If you do not have a DDNS account, select a service provider and click    to go to the 
service provider's website. Register a DDNS account and memorize your user name, password, 
and domain name of the account. 
3.  Set User name to your user name for logging in to your DDNS service, which is Tenda in 
 this example.