We have a Linux-Server (SuSE6.2) with 2 network-cards (different
TCP/IP-networks on each card).
We cannot allow any IP-Forwarding between these two cards.
Now - the problem is that we also want to use a modem for a PPP-connection
to one of these TCP/IP-networks.
At the moment this is only working when we set IP_FORWARDING to "yes"; but
now the Linux-Server may also
forward IP-traffic between both network cards.
I'm looking for a simple solution to solve this problem.
I haven't yet worked with firewalls, but in my opinion I will need to use
Does anyone have any experiences / hints to help me in this problem?
Thanks in advance