Hello! I bought recently a wireless router to FON (www.fon.com) it's a Linksys wrt54gl and i want a monitor soft to monitoring the people how connecto to my router. Anyone now a good soft to do that!
If you are just looking to see if someone else rather than you is trying to connect, the browser interface of any dsl router indicates the physical and logical addresses for the connected devices.
otherwise, you can use a wireless sniffer (airsnort to name one)
If you are using wep (the data will ofcourse be encrypted and you will need to decrypt it using your wep key)
I think you need to read ur router manual. Now days if u go to router setup there are option for WAN enable and disable u can setup a hex keys too... so that would do the work for u.