I've used pfSense in a number of deployments and have been thrilled > with it. Does Multi-WAN very well. I haven't done multi-wan with > only one external interface; you probably need a NIC per IP. I (and > probably most on this list) have fistfuls of spare 10/100 cards that > could be donated to your cause. > > > I am looking over pfsense now. In your experience is there an issue with requests coming in on one interface, returning via the default route (different interface)? I see some mention of it on their docs, and not having set up a multi-wan firewall before, I am not sure if it will be an issue,.All traffic will return to the same ISP gateway (I think). Waiting for the installer now.