|Since you double posted, I will suggest options here and then your other post can still be visible to others. |
There is the option to password protect your wireless connection on the linksys setups, however the person that originally set this up would have had to have done it. IF you have previously not had wireless connections, and are setting them up now this can be done in wireless settings accessed from the computer. The computer that is directly connected to the linksys will allow you access.
On your computer that is wired in already from within the browser navigate to
This should be your default setting, if it was changed by someone go to that ip.
if it has not been configured type admin in the password field and hit enter.
From within the page that pops up there will be a wireless settings selection. Click on enable radio, and wep settings. from there set a wep key and then enter it into your nook.