We've got two networks, they are connected using a Cisco 4000 router.
Between net 1 and the Cisco router we've got a linux firewall.
All we do at this router is masquerading. We can get from net 2 to net 1
but not from net 1 to net 2.
I've read that this had to do with the incoming services. We don't want
to use the firewall for security reasons but just for masquerading.
How do I make this to work !