I recently purchased a D-Link DSL-300T modem/router to connect a small LAN to the Internet. I have been allocated a group of 8 IP addresses which are routed/NATted by a PC. If I configure the DSL-300T in PPPoA mode and telnet in to it to correct the routing table, this mostly works, but I am consistently unable to connect to certain hosts on the Internet. Unfortunately the modem/router does not have sufficient diagnostic tools for me to work out what it is doing with packets sent to or from these hosts.
So, if you have used the DSL-300T in this sort of configuration, I would be very interested to know how you avoided or fixed this problem.
As an alternative, I thought it might be possible to put the modem/ router in bridging mode and run a PPPoE client on the PC, giving me more control over the PPP connection. Could anyone explain how to do that?
As a third possibility, given that the DSL-300T runs Linux, I wonder if anyone has built network diagnostic tools that I could download onto it?