As long as your encrypted you really don't need to worry about this. Every decent router on the market at the moment supports WEP 64/128 bit encryption, and WPA2 Personal and Enterprise. I personally use WPA2 Personal because I can remember a normal word password better then a hex key like WEP uses.
Unless your neighbors really want to steal internet from you, WEP 64bit is enough to keep most leechers out.
If someone can post any name of the applications I would be really grateful.![]()
Way to completely avoid answering his question..
That's because the question is not really worth bothering with. If he's got an unsecured network, people will be using it, sooner or later. He'd have to watch it constantly, anyone passing through the neighborhood could appear and disappear. Even if he were watching it, what good would that knowledge do him or anyone else?
If he wants to keep his network secure, he should lock it down. Otherwise, random people absolutely will go onto his network, and there will be no way to tell who they are.. (Unless he wants to hunt down hardware addresses by filing lawsuits and subpoenaing computer manufacturers.)
Well technically Apple Remote Desktop will give you the client list of everyone on the network, but here are some more with some basic searching in the downloads page from the apple site.
http://www.apple.com/downloads/macosx/networking_security/visualnettools.html
http://www.apple.com/downloads/macosx/networking_security/netmonitor.html
Cheers
Cameron
iStumbler works well.