problem setting up a local network

[Tommaso Moroni <tommaso.m@tiscalinet.it>]

Hi!

I'd like to install Debian on an old pc (hereafter called A) using an 
ADSL connection I have on another PC (hereafter called B). The problem 
is that after configuring the network on A it doesn't "see" B: the 
interface is correctly configured but a simple ping to B fails.
I've already checked the addresses (A is 192.168.1.2, B is 192.168.1.1) 
and I think the problem is the route table on B. In fact to manage the 
ADSL connection I use the italian version of the drivers at 
http://eciadsl.flashtux.org/. The command route on computer B gives this 
 output:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
192.168.100.1   *               255.255.255.255 UH    0      0        0 ppp0
default         192.168.100.1   0.0.0.0         UG    0      0        0 ppp0

I think it lacks a default route for the eth0 interface, but I cannot 
add it as there's already another one and it's needed for the ADSL to work.


Thanks in advance for help!

Tommaso Moroni