pfSense

[tmetro-blu-5a1Jt6qxUNc at public.gmane.org (Tom Metro)]

Edward Ned Harvey wrote:
> The hard part was:  A laptop naturally has 1 nic built-in.
> I needed a 2nd nic in order to do anything interesting with routing.  It was
> difficult to find a pcmcia nic which was supported.

Another option would be to use VLAN tagging[1] and an external switch
that understands it. This is what the cheap home routers do. All the LAN
and WAN ports go into a common switch with VLAN taggging used to
segregate them. Looks like you can get a switch for $25[2] that supports
tagging.

1. http://en.wikipedia.org/wiki/Vlan
2. http://www.newegg.com/Product/Product.aspx?Item=N82E16833124005

 -Tom

-- 
Tom Metro
Venture Logic, Newton, MA, USA
"Enterprise solutions through open source."
Professional Profile: http://tmetro.venturelogic.com/