Okay, I've looked and looked all over and I cannot find the answer to my specific problem. I am trying to get an open NAT for my Xbox 360. What I am using is this: Windows XP Real-Tek RTL8139 network card Cricket Wireless internet (USB modem) I have my Xbox directly connected to PC via the network card, USB modem in plugged into my PCI usb card. and internet connection sharing is enabled for cricket wireless. Cricket Wireless uses a UTStarcom UM100C usb modem to connect with. All the information I can find with the NAT setting refers to modifying settings with a router or gateway, which I am not using... so any help would be appreciated. If anyone needs more info let me know.