I am working on setting up a lan-to-lan vpn between an 1811 router and 851 router. I have the configuration set so that I can ping servers and computers on both sides of the vpn. The tunnel seems to be up, but I think I am missing a step here. I have a server and exchange server behind one side of the vpn tunnel. I thought that with the tunnel set up I could log-in just like I was in the local office, but my exchange and network drives won't connect. Am i missing something in DNS or routing somewhere?