I am using a switch to connect my computers to each other (internal LAN) until recently the DSL Modem was hooked up to one of the ports on the switch and everyone could access the internet.
I now need to give access to only a certain amount of pcs on the network, therefore I decided to connect the modem through USB to one of my computers and then share the internet connection by using ICS. The modem appears as Local Area Connection 2 while the internal LAN appears as Local Area Connection.
My problem is when I am trying to access the internal LAN it is not working (because the computer is accessing the internet thru the USB connected modem)
The modem issues an IP address along with a gateway, while internal LAN connection shows up a limited connectivity, trying to manually configure enabled me to access the internal LAN, but rendered the internet unaccessible.
How do I configure the pc so that it accesses the internet through the USB Modem and the internal LAN through the NIC port.