Linksys WRT54GL Instruction Manual page 8

Sherpa 8
Image Source : Linksys, Cisco Systems
11. Click on the drop-down button to select a security mode you prefer.
INFO: You can choose from Disable, WEP, WPA Pre-Shared Key, WPA
RADIUS, or RADIUS, WPA2 Personal, WPA Enterprise, and WPA2 Enterprise. It is
required for all devices on your wireless network to use the same security mode.
12. Now you can type in a password of your choice into the Shared Key field.
Passwords are case-sensitive.
13. Finally, hit the Save Settings button and then Continue in order to save all the
changes you've made to your router's configuration system.
14. Your router is now all set and ready to provide wireless internet access
connection to any computer or electronic device you have. Make sure that you
use the exact same password to log in into your wireless network.
Basic Troubleshooting:
Your computer cannot connect to the Internet.