We have some sites in HK and China and am looking into the following scenario
They are trying to PPTP into the UK and then use an application on a terminal server. If no one else is working, then this is possible but as soon as more staff arrive it slows down to the point where it is not usable. The internet at both locations is quick but all traffic including email is going down a shared (With Other ISP users) international connection. This is so slow.
In order to speed things up email is being moved so it is hosted in HK. For the terminal server application my thinking was to use a cloud based hosted server in HK. We RDP from HK/China into this and from this server we can then PPTP to the UK and use the terminal server. We have tried this and it is much quicker.
From a security point of view we can restrict what IP addresses can connect to the server but do I need anything further to encrypt the traffic.