You can connect a DSL modem to a D-Link router by using an Ethernet cable and then entering your DSL username and password. Most DSL modems have a built-in router, though, and this configuration will prevent you from performing some activities such as online gaming, file sharing and webcam communication over the Internet. To properly connect the devices, first configure the modem in bridged mode, then configure the router with your DSL credentials, and lastly, connect the modem and router to provide Internet access to the computers on your network.