Changing the password is the best method to keep your router as well as the network secured against the zone
Launch the web browser of linksyssmartwi-fi.com and you also can use 192.168.0.1
Enter the login credentials of the browser. The username field should be filled with the admin and password should also be filled with the password. Note: In case you have set your password before then fill up the password with that.
Click the wireless on your screen and the wireless security tab. Note: For some router of Linksys, the security settings will be under the Wireless then Wireless settings and then finally display under the manual option.
For some routers, the wireless security settings are under Wireless > Wireless Settings and displayed in the Manual .
There will be a password field, enter your preferred password.
Click save settings to save your changes