On Sun, Jul 16, 2000 at 05:03:38PM +0200, Zoki wrote:
| What I would like to know is if I can plug the Motorola modem directly
| into my hub and setup ipchains to filter eth0 <-> [external address].

You don't want to do this. If you do this, then _every_ machine plugged into
your hub needs firewall rules. Instead, put two NICs in your firewall box:

        cable-modem                  hub
             |        +--------------+++--------+
             |        |               |         |
         firewall-----+            machine 2  machine 3

which is how mine is set up.

| Another question concerns the external device. Until know I have been
| using a dial-up account which means that my external device was ppp0. What
| will be the external device with the cable modem as I won't have a fixed
| IP (it'll change once in a while)?

Eth1 probably (if eth0 remains your internal NIC on the firewall).

I just:
        - marked eth1 as ONBOOT=no in the redhat config file

        - wrote an init script to fire up dhcpcd on eth1 to get the IP,
          and made the .exe it calls (yes, .exe - we are still using Linux tho')
          invoke my setup-the-firewall script with the right args

        - generalised my old ppp setup-the-firewall script to work for eth1
          (little change, as you get a dynamic IP either way)

I have NAT (IP masquerade) active on my firewall, so the other machines only
need to consider the firewall their gateway to the outside world).

Cheers,
-- 
Cameron Simpson, DoD#743        [EMAIL PROTECTED]    http://www.zip.com.au/~cs/

"What the hell are we supposed to use, man -- harsh language?"
"Flame units only."     - _Aliens_


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