Launch a web browser first and then enter 192.168.1.1 in the address bar then press enter. For how to put a password on Linksys. Now, enter your credentials in the field provided. The user’s name field is left empty by default and the administer password is admin. Now, click the wireless tab, and then click the wireless security sub-tab. Enter your preferred Wi-Fi password Wi-Fi password. After that, click save settings to save the changes.