There will be a significant update to Simple Android Server in the coming week(s). This update will include a VPN.
This VPN is not based on OpenVPN or any other opensource VPN. We developed it from scratch in order to make it as simple and light as we want.
Another reason for this is that we want to be able to easily add features to the VPN whenever we want and also handle bugs easily without having to go through a sea of code with little documentation.
The VPN will have compression but no encryption (yet) and is fast. However, there is a certain level of latency to be expected since the requests are now traveling through a remote server.
For rooted devices, there will/may be a feature that lets you connect other devices to the SAS VPN installed on another device. So if you have the SAS VPN running on your android device and your WiFi Hotspot is on with some devices connected to it, requests from those connected devices will pass through the SAS VPN installed on your device. With this, you can connect your PC, iPad, iPhones and whatnot.
I am using this feature to create this post now but it is not as stable as it should be yet.
The SAS v3 will also include a way to easily see the values of your current configuration in a very convenient way. This is handy when trying to diagnose SAS connectivity issues.
The current proxy server feature will still be available.
We appreciate that Simple Android Server has been useful to a lot of people. We also hope to always have the ability increasing it's usefulness.
We need advertisers/sponsors see: http://zolaballantyne.github.io/simpleandroidserver/advertise/