2 Network card on the same subnet/firewall/routing

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#830

From: Claudio Parnenzini
Date: Thu, 07 Oct 1999 00:00

55 lines
2840 bytes

Hi all,

I'm having trouble to setup my firewall. I would like to have this kind of
desig
n. but I'm not sure that's possible as I would.

Internet router 212.74.140.206
                  |
                  |
          eth0 |
           -----------------
          | 212.74.140.201|
          |                          |eth1                            HUB
          | Firewall
|---------------------------------------------
          |                          | 212.74.140.202              |
|
          |                          |
|                          |
          |                          |
212.74.140.203    212.74.140.204
           -----------------                                   --------     
           -------
                                                                      | SMTP
|               | DNS |
                                                                       -----
---                 ------

|                           |
                                                                 Private
Network     Private Network

|                           |




As you can see, i have two IP adress on the same subnet. The first one
(eth0 ) is connected to my Internet router ( 212.74.140.206 ) and the second
( eth1 ) is connected to an Hub where i want to put all my server on it.

I would use 212.74.140.202 as default gateway for all the server that i have
on the subnet and used eth0 to forward ( IPChaining ) packets to Internet. I
have already setup the firewall and it was working very well, when eth1 was
on my private network. But when i changed my IP adress to have the two
network card on the same subnet one of the interface doesn't respond. It
seems to be a routing problem but i have no idea how configure/fixe my
Firewall.

Any help will be really appreciate.  If you need to have more details, let
me know.

Thanks in advance

P.S. I'm using Redhat 6.0 to do it ( Kernel 2.2.5-15 )

Technical Details

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From: "Claudio Parnenzini" <claudio@parnenzini.com>
Subject: 2 Network card on the same subnet/firewall/routing
Date: 1999/10/07
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