Is there an app that lets me know who else is connected to the same network?

Is there an app that lets me know who else is connected to the same network?

 

Define network, but yes. Tons.
Arp, ping, nmap, etc.
Mrk

 

Sorry, by network I mean router.

 

OP I am going to assume that this is YOUR router. You simply login to the router's Admin panel. From there its point and click to see all devices (wired and wireless) that are using the router. Most routers allow logging if you have concerns along those lines.

It only takes a few seconds to login if you know the password. Hopefully you have changed the "default" password but if not they are all listed around the net.

If it is NOT your router and you want to see associated wireless devices that is done through simple software. Go over to backtrack and read around. I am not going any further with instructions on a "not yours" scenario. LOL!

If you are sitting ON another network you could simply open command prompt and type ipconfig. All wireless devices will be displayed via their connection on the AP. 192.168.1.0 etc....

 

I dont know why you assume that im doing something illegal and that you can help only so much. But if you must know this is a shared router between me and my roommates and I would like to know if there is anyone else except the 4 of us connecting to it.
And what I would like to do is simply find out how many users are connected to the router via a simple terminal command or a push of a button from my laptop. Thanks.

 

You can try Nirsoft's Wireless Network Watcher utility.

 

Another option is to use Wireshark.

Capture in promiscuous mode then do a filter on the capture file.

http://ask.wireshark.org/questions/4827/determining-unique-mac-and-ip-addresses-in-a-pcap

 

Yup, arp-scan and nmap are straight forward to use for this purpose.

 

hmmm Im having hard time using nmap... is there a simple command to find out who is connected?

 

Have you tried my suggestion (post #6)?

 

Have a read through http://security.stackexchange.com/questions/36198/how-to-find-live-hosts-on-my-network

Cheers, Nick

 

This one seems to be Windows only...

 

Perfect. Thank you. It worked flawlessly. Only 2 hosts connected. My two laptops

 

I use: http://sourceforge.net/projects/autoscan/

It is pretty simple and has a nice "intruder alert" feature. So after the initial scan any new devices that popup give an audible alarm so you can know instantly.

 

hmmm ........ use of zenmap (nmap-gui) would be better instead of nmap pretty easy and straight forward to use.

also when use it use as root or sudo user to get full benefit................

 

Hmmm... My ubuntu software manager couldn't install this one.

 

Zenmap didn't work. It says that since I did not select target then 0 hosts are up. Meanwhile nmap via terminal tells me that 2 hosts are up and I don't have to enter targer. What is the target?

 

same network you scanning with nmap 192.168.x.x/24