[NTLUG:Discuss] @Home connection problems. Can't even ping.

[Kipton Moravec]

I am having trouble getting my Linux Mandrake 6.1 box to see my @home cable
modem.  I have a Win 98 box working on the modem fine.  I have moved all the
important IP addresses, static address from @Home, gate ways, DNS Name
servers, etc to the Linux box.

When I ping the gateway address with the Linux box the cable modem lights
blink, but I get no response. The windows box pings it fine.

The Linux box is planned to be a fire wall, and has two Ethernet cards.
Both successfully ping my internal net when they are plugged into the
internal network. When I try to ping the external network no response from
any address or either card.

There are no errors at boot, no messages in any error logs, all conf files
were triple checked.

We are stuck, and have no idea what to try.  The internal network works
fine. Both cards are seen.  It should not be this hard.

What else should we look at?

Kip