PPPoE server v.s. how to route?

[cephalus]

Hi all

I have one PC with only one NIC. The eth0 IP is 172.25.18.122. This IP can connect to internet.

And then I run the PPPoE server on it, the command is "pppoe-server -I eth0 -L 192.168.1.100 -R 10.0.0.1 &". I use the windows XP as the PPPoE client connects to my PPPoE server. My windows xp get a IP 10.0.0.1.

At the windwos XP command mode, I run "ping 192.168.1.100". It works. But If I ping 172.25.18.122, it fails, and the www.yahoo.com also can not ping, either.

Can anyone help me to slove it? add route table (how to add?) or the settings is impossible to route to internet?

P.S. There is only one NIC on the PPPoE server, so that the packet trace should be WindowsXP-->PPPoE-->PPP0-->LinuxOS-->eth0-->internet. I think it should be no problem even only one NIC (But 2 interfaces).

Cephalus Hu