Currently the whole internet is showing to be in the "Intranet Zone" in Internet Explorer for everyone, admins and students alike. This is causing problems as we have settings to stop students downloading from external sites but allowed to download from internal servers. With the whole internet appearing to be internal this is of course not working now.
Have checked that no wildcards are entered in to the zone settings and that there are no random Custom Settings for users but can't see anything obvious.
Anyone have any ideas? I have had a suggestion that maybe it was because we are on the grid VPN. Could this be?

Many Thanks