The normal address of a Belkin router is 192.168.2.1 and 2.254 would be the top of the range of addresses for network clients but everything you need to know about how to get into the settings and change them is in our Sticky Post on wireless security and here is a link to it. http://www.tomshardware.co.uk/forum/38111-18-find-change-wireless-security
To take it back to factory settings, you find a recessed button and pres it in with a pen point or a paperclip but if your ISP gave you the router, there's a danger you'll delete specific login details.