Hi there
I'm assuming that you have a 633 router. There are 2 issues here.
The first essential is to password protect your network !!! which it sounds as if you have done.
The second is regarding access to your router by an outsider using a wireless hack.
The advice to change the router password is valid on older routers as login and password were both ADMIN, on the 633 the password is on back of router in VERY small writing. You can set your own password if you wish in the settings page of the router, BUT, MAKE SURE THAT YOU REMEMBER, or keep the new password somewhere that you can get to it as you WILL need it at some stage.
