This is a fairly simple question, and I am pretty sure it is possible, but Google has unfortunatly failed me.
Ok, so let me start off by explaining my network set-up. I have a cable internet connection > Linksys Router (BEFW11S4) > 4 computers hard-wired to the router. Simple enough. Unfortunatly, the linksys router only lets me forward a maximum of 10 ports to all 4 of my computers. So, my question is.. is it possible to not forward any individual ports, set one of my 4 computers as DMZ on the router, then have like WindowsXP firewall or some other 3rd party software route the incomming traffic to the specified computer. (my friend has done something similer on linux using "IPTables") So theoreticly, I would actually be forwarding ports on one of my computers as opposed to on my router, allowing unlimited ammounts of individual ports to be forwarded, and all incomming traffic would first go through the DMZ'd computer.
so, first of all.. is it possible at all?
if it is possible, would it slow down my network or internet speeds any? (all computers are winxp pro w/ sp2 and 100mbps nic cards)
lastly, is it possible with windowsxp firwall? I would rather use software already built into windowsxp as opposed to installing 3rd party software, but whatever it takes.