I have resolved my confusion over what I needed VPN for and what I wanted remote desktop access for.
My deep frustration is now with setting up VPN just so that I can appear to be in the UK, i.e. at my home IP address when abroad.
Last year I set up my Asus N66U to do just that. From Spain I was able to use VPN to access BBC iPlayer, the National Lottery and other geographically restricted services. I was also using VPN for security when using public hotspots in the UK. This worked on MS-based laptops and on Android phones. Now since the router firmware upgrade to 3.0.0.4.376.1071 I cannot access the ASUS VPN server. I have followed set up protocol to the letter, the way that worked before. I am not using DNS because my IP is not dynamic.
Have any of you successfully set up VPN using the same firmware? Is it possible to spell out precisely what settings you have used in VPN set up and elsewhere, e.g. WAN and firewall settings?