How to set password for Linksys Router preventing others from using it?

Hey! Nic pic BTW... christop is leading you down the correct path. May I also suggest that you look over ALL the tabs and options in your router web page. Reduce the number of allowable connections as well. My assumption is that with an unsecured wireless network, someone WILL use it on occasion. That's not necessarily a bad thing. Most peeps just wanna connect to an available network with a good signal and web surf. That usually has no impact on your performance. The cases of hackers gaining access to peoples networks and gleefully looking through their stuff is a bit exaggerated. BUT... with the right savvy, software, equipment, and time- - - it is possible. Sad. Keep up to speed. Many good Linksys forums out there for support.

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First open a web browser (ie. Firefox). Type in the routers address: http://192.168.1.1/ Leave the username blank and type in the password box: admin Then, click on Administration tab and type in the new password.