Does your network begin to crawl right around the time your sinister-looking next-door neighbors get home from work? Do you harbor suspicions that one or more of them may be stealing your Wi-Fi?It's easy to find out. And equally easy to give freeloaders the boot. To find out who's using your Wi-Fi, the first thing you need to do is make sure you're connected to the Wi-Fi network you wish to monitor. Next, download the network monitoring app Fing from the.

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Sharing your Wi-Fi connection is one thing, but when unwanted people are connecting to your connection, you need to be concerned. A Wi-Fi spy can monitor your account or perform illegal activities that can be traced back to your router. Even without nefarious intentions, people stealing your internet connection will slow down data transfer and make it harder for you to enjoy the service that you pay for. Take back your router control by disconnecting unwanted computers from your Wi-Fi network.

Router Security Parameters

Most routers such as Belkin or NETGEAR allow you to establish a security password to control who has access to your network and who doesn't. Use a known device such as your phone or computer that is connected to your router. Got to www.routerlogin.net and log in. The first time you log in you will use 'admin' for the username and 'password' as the default password. Update all information to your own personal username and password. Remember to use complex passwords to mitigate unwanted access.

Go to the Advanced Tab, then Security and click on 'Access Control.' You are then given an option to 'Allow' or 'Block' access from devices found in the list of computers connected to your network.

Third-Party Programs

To see if a Wi-Fi spy is using your network with an unauthorized computer, download a third-party application. Who's On My WiFi (WIOMW) is a program compatible with both Windows and Mac operating systems. Once downloaded and installed, you will enter basic information as prompted by the program.

The results list names all known and unknown devices, including phones, tablets, and even Belkin routers. App use on your Android or iPhone is also seen as 'allowed' as long as you are entering the device as a 'known device.' Confirm that all devices listed are on the IP address that matches your server. In the program you have the option to remove any unwanted users with a simple click of the mouse.

Encrypt Your Network

Once you have removed unwanted users from your Wi-Fi network, take the time to encrypt your network for increased security measures and router control. Check with your internet provider for exact details, but most work similarly. Verizon stores an encryption key in the network router. Log in to the router and locate Wireless Settings. In the left navigation bar, select 'Wireless Status.' Choose 'Security Enabled,' and you will see the encryption key listed. Take note of the encryption key, update the password to a complex set of characters, numbers and case. Store this information in a safe place to provide to anyone to whom you want to give access.

About the Author

With more than 15 years of small business ownership including owning a State Farm agency in Southern California, Kimberlee understands the needs of business owners first hand. When not writing, Kimberlee enjoys chasing waterfalls with her son in Hawaii.

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I have a WiFi router at home and would like to know if there is any way to know who is connected to my WiFi network and using it. My WiFi network is password protected but still there could be a chance that neighbours crack it and could use my WiFi for free.

For this reason I would like to know is there is any tool to inspect the log of the WiFi router in order to know which computers are connecting to it.

7 Answers

Whos On My Wifi Network Tool Kick Them Off For Macbook Pro

Usually a WiFi router has a web interface that shows all (previously) connected WiFi devices... Try going to the IP address of your router through your browser.

Read this part, and the rest of my blog post about WiFi security here: http://blog.superuser.com/2011/03/28/iron-cladding-your-wi-fi-network/

Happy reading!

first, it helps to understand how WIFI works, read http://www.wi-fiplanet.com/tutorials/article.php/1447501 and/or http://www.cs.wright.edu/~pmateti/InternetSecurity/Lectures/WirelessHacks/Mateti-WirelessHacks.htm.

any other machine 'using your network' has to be associated to your network which means it sends 'associated beacons' (as explained here).

then all you have to do is to grab a tool which sniffs WIFI-packets and then analyze, which of the received packets are meant to be used 'in your network', you can find a list of tools over at http://www.topbits.com/wi-fi-software-tools.html.

and then you can compare the MAC address of the sender with the MAC address of the devices you allow and hope, that the sender did not fake its MAC address :)

Network Tool Kit

If you're worried, changing the password on a regular basis will ensure that if somebody does break in, they won't stay for long.

Obligatory XKCD reference: http://www.xkcd.com/341/

if you can use Linux, there is a tool which is called aireplay-ng it is actually a set u will find, airodump-ng,aireplay-ng and so on...

{For Linux only}if it is not downloaded and let's say you are using Ubuntu get the tool first using the apt-get install command,

then look for wireless routers iwlist scan wlan0

then see which channel you router is on,

Network Tool Warehouse

then airmon-ng start wlan0

and finally airodump-ng mon0

as bloodphilia has said, you could find this you thorough the web interface of your point (typically 192.168.2.1 or 192.168.2.2, not always though). Mine at home will show the ip, mac and computer name so if there's a computer (or iphone, laptop, etc) you don't recognise you can set up a MAC Blacklist...or change you wireless key.

You can use Kismet to detect not only yours but any router which is transferring data. I usually use BackTrack for this purpose. But generally to hack modems wifi password.

Another alternative is to use Netscan which only works for windows. But you can detect any ip's using your modem. Also make sure wifi users are not isolated.

A GUI program is WifiGuard, free in Linux and Windows.

It can monitor and rescan the network every 1 to 60 minutes, play sound or send mail on detection, etc.

Iphone Wifi Network Tool

To use a CLI option for Linux, follow these instructions.

Wifi Network Tool

protected by nhinkle♦Nov 28 '11 at 7:10

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