ok my server is like this:
eth000: is the network interface that conneted to a switch and to the switch connected 4 computers.
zeroshell address there is 192.168.0.1 and he is a dhcp server for the 4 computers.
eth001: is connected to a dsl modem and zeroshell server is connecting using pppoe on this port to the internet.
there is nat between the pppoe and the eth001.
how someone that connected to the vpn server can access to the internal network that connected to eth000?