Is it possible to see if anyone is using my wireless internet?

[Kyuubi]

My router has password protection and is able to see who is connected. All latest routers should have it. If your router is old and doesn't have password protection, I think you should probably get a new one.

[MarkW7]

If you suspect someone to be using your WiFi, run a quick nmap scan to see who's on your network.

Linux:

Code:

nmap -sP 192.168.2.1/24 | grep 192

Windows:

You can download a program called "Zenmap" it's an nmap GUI or just install nmap CLI under windows and run:

Code:

nmap -sP 192.168.2.1/24

-sP = Ping scan, it'll just tell you who's online.
192.168.2.1 = Your routers IP
/24 = Your whole class C network
| grep = Just filters the 192 address' (IPs) so you don't have to read a load of crap.


Any probs, post or PM me.

[Troxin]

Use Cain and Abel.

Find out who is doing it.