So I've had an Asus rt n12 router for about 6 months now. Its been a good router and all and haven't had any problems with it except for when i came back labor day weekend. When i got back i found that none of my devices would connect and that my routers name had disappeared from all of my devices. The only thing different was the appearance of the wireless id dd-wrt. When i tried to log in to my router, i found myself at the final stages of dd-wrt setup where it asks you to make a username and password.
I'm kind of freaking out, no one in my house could of installed it cause they were gone for the weekend (and wouldn't know how to in the first place). What could of caused this?