Setting up internet Password

[aluminumapple]

Long story short, im a notebook user so im on my macbook around the house living room, bed etc when iv noticed from my internet provider that iv used 75% of my internet memory usage which is 60 Gb. I was stunned and i didnt know that i used much and so i stopped using internet for the whole day, the next day it says iv used 100% all of my internet and per 1 gb i use after there charging me $2 each gb. So now i know some douch bag neighbor is stealing my internet.
so now i have to install a password but i have no idea how.
I have a WRT54G Linksys and i have No idea how to setup a wep password or any kind of password on a mac.. any help?

 

[madog]

I'd set up a WPA if possible. The manual can help you out but if it's the basic blue colored linksys it can only be set up manually, while the newer black ones have software now available for the Mac.

In whatever browser you use, while connected to the router (wireless or wired) type in:
192.168.1.1
no name
pass: admin

If the neighbor doesn't know about that info then hopefully he hasn't changed it himself. If that doesn't work, or if I'm wrong and the "name" is admin, pass is left blank, then you'll have to reset it back to factory settings. I believe you do that by holding the reset button on it for 30 seconds.

Anyway, once that info is set in, then navigate your way through the settings. It should be in the Wireless tab and then I think under Wireless/Security. Set the security pull down menu or button to WPA, and then set any password you want. After doing so click save or apply at the bottom, the device should reset itself and you'll have to reconnect to it.