Using a wired AND wireless network on one machine for better security

Question

It occurs to me that if I could separate my Internet traffic from my LAN traffic, I could have the best security setup, so that machines on my network would only have file sharing enabled for the WIRED connection and I would use the Internet over the WIRELESS connection.
How do I configure my PowerBook and Mac Mini to do this? In the Sharing preference pane, it doesn't allow me to specify which network port the sharing will be active on.
And once I am conncected to both a wireless and wired network, giving each machine 2 IP addresses, how does the computer know to route the IP addresses to the right port?
I'm using an Airport Extreme Base Station (connected to a cable modem) configured to distribute IP addresses to the wireless ports on the computers for Internet and a Linksys router distributing IP addresses to the ethernet ports on the computers with sharing turned on.

Answer 1

in the Thinkvantage Access software, you can set the network preferences. So you can set the Ethernet to be your most preferred network connection method, while your wireless as the second most preferred method. Or which way you prefer.
So for example, when you dock and the computer detects the ethernet network connection, it will automatically switch to the ethernet as it becomes available. And when you undock, your computer will switch back to wireless as ethernet is not available.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft