So far, the easiest way to setup the TP-Link TL-R402M router with the ProLink H9200 ADSL modem is to plug-in the modem's LAN cable to one of the router's 4 LAN ports. This works fine, however, but aside from reducing the available LAN ports, we've reduced the router's function to a mere switch. To avail of the router's security features and routing efficiency, we must pass all internet traffic through its WAN port.
:mrgreen:
Read the Tutorial
For those who have a web server running in the network, you must setup port forwarding to allow incoming connections.
:mrgreen:
Read the Tutorial