I setup a PC with ubuntu and dansguardian to act as a router and a content filter. This PC has two network interfaces, one connecting it to the modem (straight UTP cable) and the other directly to another PC with a cross over cable. More or less like this:

MODEM - DHCP enabled
SERVER eth0 - Obtains IP from modem
SERVER eth1 -

SERVER - Ubuntu 8.04
CLIENT - Windows XP SP2 with firewall turned OFF

From the server I can ping to the client without problems, but I cannot ping from the client to the server ie: I cannot get dansguardian to work.

My question is simple. What might be preventing the client to ping the server??? As far as I know there is no firewall set on ubuntu...

Please help..