[NTLUG:Discuss] How to make Linux server transparent to internal machines?

[George Lass]

I don't know if you can really do any fire walling if you truly
want the linux PC to be "transparent" but you need to configure 
the linux PC as a bridge to pass unaltered packets to your switch
and then to your windows PCs.  You will need to enable bridging
in your kernel (and I'm sure a bunch of other stuff that I can't
remember).  You will also need to configure network device in 
/etc/sysconfig/network-scripts with a script called ifcfg-brg0
that looks a lot like a normal ifcfg-ethX except the device is brg0

I've actually done this and have it up and running.  Problem is
that I'm going to be away from my computer for the next 2 weeks
so I will be out of touch.  I hope this will get you started.  If
you don't have it finished drop me a line in 2 weeks and I'll
see if I can help out 


George

Neil Aggarwal wrote:
> 
> Hello:
> 
> I have a block of static IP addresses on which I want to run
> several Windows machines.
> 
> Since I want to have a firewall, I was thinking of using 1 IP
> address for a linux server that will act as a firewall for
> the entire setup.
> 
> So, here is a diagram:
> 
>   [Internet] -- [Linux Server] -- switch -- [Internal machines]
> 
> The linux server and the internal machines all have static
> IP addresses which are public to the Internet.
> 
> How can I set-up routing so the Linux server is "transparent"
> to the other machines?
> 
> Thanks,
>         Neil.
> 
> --
> Neil Aggarwal
> JAMM Consulting, Inc.    (972) 612-6056, http://www.JAMMConsulting.com
> Custom Internet Development    Websites, Ecommerce, Java, databases
> 
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