i use the Cisco VPN CLIENT built into iPhone to get into my Orion server. it works great but...
i've had occasions when Safari (iPhone browser) does not allow me to use the BACK key to view a page which i had been on previously.
it pops up a message CANNOT OPEN PAGE the server can not be found. and this may be something with the VPN session timing out, but i'm not sure yet.
if it is timeout related, does anyone know how to adjust session keepalives with the iphone Cisco VPN sessions because this may only be VPN related. thanks.