Local Basic Operations 240Figure 4-210Step 2 Enable the PPPoE function.Step 3 In the User Name box and Password box, enter the user name and passwordaccordingly provided by the Internet Service Provider.Step 4 Click Apply to complete the settings.The system pops up a message to indicate the successfully saved. The IP addressappears on the PPPoE interface. You can use this IP address to access the Device.When the PPPoE function is enabled, the IP address on the TCP/IP interface cannot bemodified.4.12.4 DDNSWhen the IP address of the Device changes frequently, the DDNS function can dynamicallyrefresh the correspondence between the domain on DNS and the IP address, ensuring youaccess the Device by using the domain.PreparationsEnsure the Device supports the DDNS Type and log in the website provided by the DDNSservice provider to register the information such as domain from PC located in the WAN.