> I have a box that I want to do IP forwarding. But, I can't ping outside
> hosts through it. The firewall sends packets from me, but it doesn't
> re-forward the ICMP echo replies (although you can see them with iptraf in
> promiscuous mode) back.
just an idea to make it easier to spot the error:
add ipchains rules, which do logging:
ipchains -A {input|output|forward} -j ACCEPT -l
look, what happens then.
possibly your problem is a routing one. does pinging the hosts from the
gateway work?
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