Disabling Network Interfaces

[Shahzad]

All,
I need to find a way to have Windows only allow one active NIC at a
time. In other words, if Ethernet-1 is active and I plug Ethernet-2 in,
Ethernet-1 automatically disables itself and vice-versa. We are trying to
prevent users from dual-homing and from bridging interfaces. I don't want a
user that is plugged in to my Corporate network bypassing the firewall with
a secondary NIC.

Thanks for the help,
John