Can you do a little ascii sketch of how things are connected?  When
you say "I can ping both nics in the Mandrake box from the client"
that makes me wonder if you have both router nics plugged into the
same hub.  A simple firewall/router setup *should* look something like
this:

      Internet
     cablemodem
          |
          |
        eth0
   firewall/router
        eth1
          |
          |
client---hub---client
          |
          |
        client

Once everything is connected right, you'll need to configure the
firewall to masquerade your internet connection to the systems on your
local network.


Sincerely,
Jim Hubbard
              .--.
             |o_o |
             |:_/ |
            //   \ \
           (|     | )
          /'\_   _/`\
          \___)=(___/

Rockingham County Linux Users Group
        www.rock.lug.net








-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Tom
Sent: Tuesday, December 31, 2002 11:48 AM
To: [EMAIL PROTECTED]
Subject: [newbie] Router/firwall


I am trying to setup a router/firewall.
Installed the nic
set eth0 to the 192.168.1.1 255.255.255.0
set eth1 to the ISP static IP address and mask.

Connected the computers .
I can ping anything from the Mandrake 9.0 box.
I can ping both nics in the Mandrake box from the client
I can ping the mandrake box eth1 from an outside computer
but I cannot get outside the from the client in the network.
I cannot ping the ISP's gateway or anthing else outside the eth1 nic.

What have a done wrong?
  Thanks


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