Transparent firewall

Janos Makadi <maki@xxxxxxxxxxx> · Wed, 02 Jun 2004 22:10:20 +0200

Hi,

I have a problem, and I don`t know how to solve it.

What I would like to do is this:

I have a database server and I want to protect it. It has one nic 
connected to the local network. I want to setup a new linux box with two 
nics connected to the same ip network like this:

       ****        ****
 ------*  *--------*  *
       ****        ****

      Linux       RDBMS

Every traffic has to go through the Linux box, and filter out the 
unneded packets. I dont know how to config the linux to use the same ip 
network with this confoguration. Let me explain. For example the server 
has 10.1.0.5/255.255.255.0 address, and all the clients use this network 
config too. What ip addresses is allowed to use with the linux box? I 
mean can I use 10.1.0.4, 10.1.0.3 for the two nics at the linux box?

Any RTFM answers, with links is appreciated.

Thanks,

Janos Makadi