I live on a college campus and their wireless network is horrid. I have multiple computers and an iphone. I would like reliable internet. The ethernet connection here is a bit more reliable, though not amazing. I was thinking that the best way to resolve this issue was to put in a router of my own. However, I have questions. Can I set my computers to file share only to those computers connected to my router? i.e.: they must be connected to my network rather than the school's network? I ask because if I purchase an airport extreme, I could connect a hard drive or printer to it and I'd like to keep those things for my network, rather than share them with others.