From: "sai" <sonicsai at gmail dot com>
>  An IDS should be connected to lots of different places on your
> network and needs to have a massive CPU and hard disk.
> A firewall needs a low end cpu and no hard disk. It is connected to one
> Totally different machines. Totally different purpose.
I also would say they have very different approaches. A good IDS system is
a sneaky thing that watches for intruders. A firewall is a bold thing that
blocks them. However, I can see the virtue of having some easier hooks
built into m0n0wall for other IDS systems.