How can I detect other WiFi users in my network?

[TazExprez]

I would like to know how I can detect other people using my WiFi connection. I know I could do it using my laptop, but I would like to be able to do it with my wired PC using the WiFi router. Thanks for your help.

 

[skyking]

depending on router model, if it has logs you can look at the traffic. If they hack it with a dhcp request, they will show up as a dhcp client. There are many ways. You can sniff the traffic with ethereal.

 

[JackMDS]

If you need history (as point above by Skyking) you have to dig to the Router log and see what it provides (it vastly vary from one Router to the other).

However if you feel at a specific moment "Hey it seems that someone else is using my Wireless"

Download this little util: TCPview

It is one exe file no need to set up put some where on your Drive with a link to Quick Launch.

When double click on it will show you what computers are on your LAN at the moment.

Out put would look like this:

Network resource Host name IP-address
---------------- --------- --------------- -----
\\MAIN    Main        192.168.1.51
\\VIDEO      VIDEO   192.168.1.52

If you have more than the number of your computers, or and an unknown entity call the "police".

:sun:

 

[TazExprez]

Thanks a lot for your help. I wonder if my network is safe? Neither of these programs could catch anything so far. Right now I only have my wired PC on the WiFi network, btw. TCPNetView ends the scan and doesn't find anything. Ethereal doesn't find anything, either. I went to Shields Up today and all my ports, except 113 were stealth. Then I forwarded that port and now all of them are on stealth. What else should I do to protect my network?

 

[JackMDS]

You are mixing up Wireless Security with Internet Security.

Ports and Internet scanning (like GRC does) is to make sure that you are protected from the Internet.

People Leaching on you Wireless Connection has only to do with your Wireless Security.

May be this can Help: Wireless Security.

:sun: