Tech Tip: Check If Someone Is Using Your Wi-Fi

By Jos ยท 20 replies
Sep 28, 2011
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  1. Per Hansson

    Per Hansson TS Server Guru Posts: 1,958   +216

    As an addition to the article you can use this free MAC Address lookup tool to see which manufacturer created the device, this might help you narrow down your choices (Like if it says Nokia or the likes you know it's a mobile user etc...)
    Julio Franco likes this.
  2. Burty117

    Burty117 TechSpot Chancellor Posts: 3,146   +911

    Nice guide, I had an issue recently, in that BT in the UK allow anyone to connect to your homehub as it acts as a public and private WiFi hotspot!

    I just canceled the contract and went to a different provider, bought an expensive Netgear Router and now we have only one SSID, it is Hidden, WPA2-PSK Personal and Locked down to only the MAC addresses of the devices in our house. WPS is disabled as well in-case we have a party and someone thinks its funny to press the WPS button the router to try and gain access :) all the while I have a Watchguard x750e Proffessional Firewall keeping everything safe, this is a bit overboard but its more for studying and testing perposes than protecting our house from hackers :)
  3. Great article! I would definitely use MoocherHunter just to intimidate the guy!!

    "I'll be like hey whatsup. Ready to get sued?"
  4. TorturedChaos

    TorturedChaos TechSpot Chancellor Posts: 839   +29

    Also if you are running DD-WRT firmware you should be able to click on the MAC Address and it will look it up for you, giving you manufature info.
  5. stewi0001

    stewi0001 TS Evangelist Posts: 1,681   +1,080

    thanks for the useful article :)
    anyone else have anything else to add?
  6. amstech

    amstech IT Overlord Posts: 1,936   +1,101

    The UI is different for almost every router.
    My little Cisco at home looks nothing like that, and if I was computer ilitterate a single guide on how to use Netgears software would not help me. Just saying.

    Jose, your intentions are good though.
  7. LMFAO... you could always just secure your network properly from the beginning.
    p51d007 likes this.
  8. matrix86

    matrix86 TS Guru Posts: 843   +38

    In my apartment, the SSD is hidden, password protected with WPA/WPA2 PSK, the number of devices able to connect to the router is limited to the number of devices in my apartment, and the only devices that can connect are ones that have their MAC addresses keyed into the router. So someone would need to be pretty desperate to get onto my router. It'd be easier for them to just hack into all the other ones around me, lol.
    Julio Franco likes this.
  9. Butch

    Butch TS Enthusiast Posts: 112

    Man, I hope my neighbor doesn't see this article...
  10. tonylukac

    tonylukac TS Evangelist Posts: 1,374   +69

    Many cheap chinese routers don't list the devices using the router. Two of those that I have/had don't, except until I ugraded the firmware on the one.
  11. aj_the_kidd

    aj_the_kidd TS Rookie Posts: 555

    You get what you pay for
  12. TorturedChaos

    TorturedChaos TechSpot Chancellor Posts: 839   +29

    Its amazing the number of people who don't secure their WiFi at all. Last weekend I went on a short trip and got kinda turned around. I pulled out my laptop in a residential neighborhood and found about a dozen WiFi connections, half of which were wide open, and of the ones that were secured only one didn't use WEP. All had SSID broadcast on.

    I do like how some of the newer routers will practically setup your WiFi security for you. Thats very nice for computer illiterate people.

    But in close pack areas you really need to be careful about your WiFi protection. An aunt of mine was accused of all sorts of illegal active. Turns out it was her neighbor swiping her WiFi.
  13. grvalderrama

    grvalderrama TS Enthusiast Posts: 194

    Hopefully, my neighbour will never read this post =P
  14. To those who posted that are using WPA2 PSK, I sure hope you realize that WPA2 AES is stronger.
  15. "To those who posted that are using WPA2 PSK, I sure hope you realize that WPA2 AES is stronger."

    Uh, PSK is pre-shared key, which means you give the same sequence of characters to all the devices. AES (technically it's not even AES, it's CCMP) is one of the ciphers you can use in PSK mode (and EAP mode), TKIP is the other one, and it's TKIP that is insecure.

    I've found that the best security I can achieve on a wireless network is to use WPA2 CCMP Enterprise with EAP-TLS authentication. Connecting clients need a signed TLS certificate. This allows you to issue and revoke certificates as needed to allow devices on and then disallow them from connecting in future, without having to change the details on any other device.
  16. akonobi

    akonobi TS Rookie

    I know a guy who does network security monitoring and he says that a lot of times people crack private networks illegally using a special adapter called an Alfa adapter. I also read here that this adapter is the wifi adapter of choice for "war driving." The funny thing is that he uses the same adapter for his work.
  17. Also, a good Penitration testing tool is Backtrack Linux and you can boot it rom CD to.

    and good guide!
  18. HuntForTheWOrst

    HuntForTheWOrst TS Member Posts: 27

    Pfft I have a bell password good luck guessing that.
  19. jobeard

    jobeard TS Ambassador Posts: 11,158   +986

    You might find inSSIDER to be useful; it's windows compatible and does not require a standalone boot to allow WiFi Monitoring.

    It shows what SSIDs are within reach, not which systems are attached to your router however.

    see MetaGeek-inSSIDer
  20. Thanks dude!!!
    it worked for me.

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