a simple networking problem

[Lennart Sorensen]

On Tue, Apr 13, 2004 at 05:18:54PM -0400, Zbigniew Koziol wrote:
> Please forgive my ignorance in this subject and alziness to solve the problem 
> myself. I would prefer rather to go ahead with my urgent project than to 
> spend hours to find the solution myself.
> 
> There are 3 computers in this place.
> 
> (1). A connected to the internet openBSD working as a gateway. Its local IP 
> address is 10.1.1.1
> 
> (2). A linux (RH 7.2) working as a workstation used by me in everyday life 
> for work and fun. Its local IP is 10.1.1.11
> 
> (3). A new box with Windows 2000 Pro (sorry, had no choice but to use it for 
> my temporary work). I have problem to connect this one.
> 
> Computer (1) has a place for one ethernet card only. 
> Computer (2) has already two ethernet cards inside.
> 
> Hence, I want to put traffic between (3) and (1) through (2).
> 
> At this moment, /sbin/route on computer (2) shows this:
> 
> 10.0.0.0        *               255.0.0.0       U     0      0        0 eth0
> 127.0.0.0       *               255.0.0.0       U     0      0        0 lo
> default         gate            0.0.0.0         UG    0      0        0 eth0
> 
> I know that ethernet cards work properly on all computers and configuring (3) 
> to that extend I need is not a problem either.
> 
> The question is:
> 
> How to manipulate by /sbin/ifconfig and /sbin/route, etc, on computer (2) in 
> order to be able, at least, to have a working connection between (2) and (3) ?

Well you could make computer 2 the gateway for 3 and then setup a
seperate domain for the network that 2 and 3 share and setup ip
masquarading on 2.  or you can use proxy arp on 2 to make it appear as 1
to 3 and as 3 to 1 and let it forward packets between the two network
cards as needed (essentially bridging).

The simple solution is to get a hub or switch that you can connect all
the computers to, which is not expensive, and the right way to do it.

Lennart Sorensen
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