[ubuntu] Is it possible to do this? (Nvg510)

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http://ubuntuforums.org – Well i have an old Nvg510 gateway from when i had service through AT&T U-verse, but I have long been through with them...but is what im trying to do is connect my nvg510 to a public WiFi HoTspot next to my house so that the signal will be alot stronger for my laptop to pick up. How would i go about doing this? is it possible? Im not having much luck on anything through google. I appreciate any assistance with this! (Hardware)