So i have a bit of an odd question and i think i already know the answer but i want to be sure. I would like to set up RDP for 3 desktops at my house to be accessed over a vpn when not home. Currently i am running a VPN on a linksys WRT54g router with dd-wrt. I would like to know what all needs to be done to limit the RDP connections to my lan and VPN connection only? IE I would like to block RDP access over the normal wan connection completely.