I share my 512kbps internet connection with my girlfriends brother. I have an iMac (Core Duo) 17" He has a PC. I'm using a Netgear Router I want to prevent Neighbours being about to surf using my connection. So how do I set up a password to do this. Either in my OS or with the Router options. Can anyone help. (I've tried going on Netgears site but it's not exactly simple).