Open BSD Firewall

[Koal.T]

Hi,

I am a newb at BSD. I have never admined a BSD computer before.

I need to setup a good firewall on my home ADSL (BT Broadband).

I have been looking around and OpenBSD seems to be a good choice as it is pretty secure as default. I currently have a USB Bt Voyager modem, which as far as I know only supports windows.

I have a Linux server which is 192.168.0.1 and all my computers are 192.168.0.5 to 192.168.0.99 according to DHCP. The internet comes in on a windows box I have on 24/7 with Norton firewall/antivirus.

So, I also have an old computer with a 133Mhz proc and 32mb of RAM with a 4gb HDD.

How can I set up an openBSD firewall with strict rules to protect my network (as it would be the only protection on some machines with most of my workstations having their own firewall.

I might need to buy a new modem and have an extra network card in the pc. It would be 192.168.0.2 and need to run the DNS, port forwarding, dhcp?, etc etc.

How would I do this, what tools, any tutorials etc help would be great.

Also, how easy would it be to run it off a compact flash card if I got an adaptor? I heard you can use it to copy the OS to the RAM at bootup to avoid constant rewrites to the CF card and then it forgets it at shutdown. Is this possible?

Thanks,
Koal