I assume you are connecting wirelessly. When it is displaying the 192.168.0.1 router address, just tell your Mac not to ask to connect to other networks. It's a checkbox in System Preferences -> Network just under the Network Name popup.
Your Mac is a desktop, so no problems. If it was a laptop and you wanted to be able to connect to other networks when you are out and about, you could create a second Location, call it "Roaming", and enable that checkbox for that Location. Then switch between the Locations depending whether you are at home or away.
Demon since forever, HomeOffice MaxDSL since 2006 via Netgear DG834G router
Mac Pro 2.66GHz 8GBytes / MBP 13" - Snow Leopard plus Centos4 & XP Pro in Parallels
Edited by AlanH (Thu 22-Dec-11 21:41:03)