[all variants] no wireless except near dorm

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http://ubuntuforums.org – I connect my laptop to my school's wireless network, which blankets the entire campus. The name of the connection is the same throughout campus, but there seem to be different access points (I dont know the details of this). The first time I connected to the wireless network, it was near my dorm, so I must have connected to an access point near my dorm. My problem is that I cant connect to the network anywhere else except near my dorm! I suspect that because the connection has the same name everywhere, Ubuntu tries to use the same exact settings (maybe the same IP, who knows), which vary fr (HowTos)