hi Stefan,

Thanks for all your replies. They are much appreciated.

Another question has come up.

Under *the standard settings* for medium trust level can a web site start a tcp/ip transaction?

Typically in an e-commerce site one needs to start a tcp/ip communication for confirming a transaction.

The upshot of this is for the ISP and web administrators.

Many thanks.

I don't believe so. The System.Net classes that allow opening sockets require the System.Net.SocketPermission. SocketPermission is not part of the default Medium trust permission set.

However a machine administrator can of course add this permission - much like they can add/edit the System.Net.WebPermission today.

-Stefan