In order for a router to work properly, the WAN (internet), and LAN (home network) connection must be on two different networks. By default, the Motorola 2210 uses 192.168.1.0/24 as the default network, and gives a single IP address to a connect device, such as a laptop or PC. The router that you are using connects to the modem in the exact same way. This method of Automatic IP address assignment is called DHCP. By default, most routers use this configuration for the WAN, or Internet, connection. In order for devices to connect to the router, they must be on a network that is different from that of the DSL modem. Changing the LAN, or home network side, of the router interface to 192.168.2.1, changes the network that it is on. The router now can forward packets between your home network and the Internet successfully.