My phone is HTC desire, Android 2.2.
It seems to connect to the VPN server while using WiFi, but the broswer and other applications can't be access the Internet any more. The connection is disconnected after minutes automatically. However, the same VPN settings work well while using 3G.
Update: The router allows VPN connections -- My PC and a Milestone 2 can use the same VPN over the WiFi network.
Update2: It doesn't work over all WiFi connection! My phone could access the Internet when connecting the same VPN over the WiFi network of my office. It looks like the VPN only doesn't work over the WiFi network of my home.
Update3 - solution After updating my phone to htc official desire 2.3.3 dev ROM, it works. So it looks like there is a bug fixed by Android or HTC rom in 2.3.3.
Does anyone know how to resolve or diagnose this issue?