[TriLUG] a quick firewall

[rasch at raschnet.com]

On Wed, Aug 13, 2003 at 12:08:20PM -0400, Daniel Monjar <daniel.monjar at na.biomerieux.com> wrote:
> I want to build an internal firewall that will sit between an Internet 
> connected device and my core switch.  I want this guy to pass transparently 
> everything it gets with the exception of certain IP ports.
> 
> Given a box with two net cards and a recent version of linux this should be 
> easy, right?
> 
> Any pointers?

I'm not sure if you mean a NAT/MASQ firewall, or just a transparent
bridging firewall.  

I used this guide here to setup a transparent bridging firewall on a 2.4
kernel:
http://www.debian.org/doc/manuals/securing-debian-howto/ap-bridge-fw.en.html

David
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