Correct setup of a wireless router is the first line of defense against unauthorized access of your wireless network. While the wireless signal is protected by an authorization code, the router itself must also be protected by an administrator password. This password must be used when setting a wireless key and encryption mode, changing the channel, and other common chores.
When shipped from the factory, most Linksys Wireless routers have the same administrator password. For your security, this password should be changed when the router is installed.
Connect to the Linksys router from your PC via an Ethernet hookup. Open a web browser and enter the router’s IP address in the address space (the default IP address of a Linksys router is 192.168.1.1). The router will display a setup page.
Enter the administrator user code and password. For a new installation or following a factory reset, leave the user code blank. The default administrator password is “admin” (without quotes).
Click on the “Administration” tab. Enter a new password in the blanks marked "Password" and "Re-enter to confirm".
Click “Save Settings” and exit the administration program or make other changes as needed.