I did it with proxmox, working pretty good. Was wanting untangle for some utm stuff since i cant keep the l7 stuff in pfsense 2 working without blocking everything or crashing. Works exactly as planned, i just created a dmz and didn't do a tbridge, w/ two physical nics for in/out interfaces. Untangle pissed me off since there are no good reports for the webfilter w/ out paying for esoft. So was looking at redesigning and putting a pf+squid back in front of untangle and converting to tbridge. So it would be a dual pf setup w/ an untangle tbridge in the dmz mostly for layer 7, av. its really neat, a vrouter appliance. i can redesign on the fly, etc. I have 4 gbit intel mobo so i have enough adapters to come back out to the real world for dmz's + portals + extra router/wan interfaces, + i can add to more to my appliance pretty quickly and cheaply. I had to combine all the diff products to get all the functions i wanted, just had to use more hardware. i added a 2nd 2.5" 160gb 7200 drive just for the untangle vm to run on as it used the disk quite a bit, it took a few mins to boot all the way up on 1 disk, 2-4 or so, still waiting for 2nd drive to arrive. running on a c2d e8400. would like to get it down to roughly a min and and add a vm or so... . didn't seem to affect my internet connection at all, im only 10/1 mbps though. like to do some real world thruput testing, vpn etc... kinda fun project. Slap one of those new 1156 chips deskop or server, and that would be some serious firewalling power for SMB if it can perform well.