Originally posted by Tyler1989
And internet hubs/switches are not insecure? The basic routers today are hubs with extra features if you look at it in from a certain view.
Sorry to correct you again but I would just like to clarify a couple things.
Hubs are insecure because as DJ-CHRIS said they just take everything and foward it (its a little more technical but i won't get into it). It is very easy (with a packet sniffer) to capture traffic.
Hubs and switches are not the same. Hubs are less intellegent than switches.
The routers that I assume you are talking about (Linksys, D-Link, etc.) are actually routers with built in switches not hubs which makes them more secure (because they don't broadcast network traffic).
Having said that, personally I would have to agree with bla!!. I think a direct conversation (make sure its calm and collected) would be the most benificial. If at that point you don't feel that he is being honest, then you can resort to other methods. If he is good it is going to be pretty hard to monitor him w/o him knowing or disabling it.