My primary internet cable access is through a non-wireless router (Linksys), and I have a wireless router (Linksys WRT54G) set up to broadcast through my house. I have set the router up to only provide access for my own computers via MAC filtering. Now a guest wants to hook in, and the number that I thought I had set up as my wireless router's IP number does not grant me access, although everything is working. So I must have misremembered it's IP number (which I had set up as a non-default number). What easily available utility can I use to scan my local network to turn up the numbers. At my office, the router software for the non-wireless router there4 (Netopia) would give me all the info I needed, but the Linksys software doesn't