So I did a capture with wireshark. USB adapter connected to my laptop with windows xp. I bridged the two network connection. Hooked my desktop to the built in ethernet and my lan to the USB adapter. I tell wireshark to watch the built in ethernet. Ping google from the desktop and in wireshark I see outgoing from the desktop IP to google and a reply from google to the desktop IP.

That would mean I am getting outgoing and incoming right ?
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Matt