I have three devices (MacBook Pro, iPad and iPhone) that sometimes connects to my neighbors wifi even though System Preferences > Network says I am connected to my SSID. If I go to the router admin page (192.168.1.254), I do not see my U-Verse admin page but my neighbors DSL router admin page. Turning Wifi On/Off usually resolves the problem sometimes. I have even changed my SSID. How is this possible? Update: The problem turns out the culprit was my roommate was using a Netgear power line adapter and so was my next door neighbor and encryption wasn't enabled on any adaptors. So whenever a device requested an IP address, it found the first DHCP to respond and connected to that network.