I have a T1 coming in to our router, which is connected to our Linux
firewall, which is a dual-homed system connected to our LAN. The Linux box
sees the LAN just fine. I have used a Win95 laptop to ensure that I can
ping the router and beyond. Yet when I connect the Linux box to the
router, I can ping the router, but addresses beyond the router give me the
"Network unreachable" message.
I've had a couple of more experienced Linux friends look at my ifcfg-eth0,
route table, and so forth, but so far we've not discovered the blockage.
What should I be looking for to solve this problem? I hope I have given
you enough info and thanks to the Linux community for your help.