I would like to test out a multiple site A.D. domain with two servers, on different subnets, each sitting behind it's own Linksys router (WRT54GL). The idea would be to have Active Directory replicate securely over a VPN. The machines would connect over the public Internet, through the WRT54GL's. Everything I have read so far alludes to WS2008 RRAS having two NICs for this type of setup. Is that totally necessary, since I have the routers?
Am I barking up the wrong tree?