How to interupt a wifi signal

Hello,
I have a friend internet wireless signal that is being hijacked by anothe individual and we know who it is, but can't get him to get his own internet, is there anything we can do to block the internet siganl that will only interfer with the indivual that is hijacking the internet and not interfer with the individual that has internet legally? Any help with this would be awesome.

Thanks for you time and advise
4 answers Last reply
More about interupt wifi signal
  1. Put a passphrase on the network and don't share it with him.
  2. Use mac filtering to disable him from getting on the network.
  3. SR-71 Blackbird said:
    Use mac filtering to disable him from getting on the network.


    Thanks for your response! Greatly appreciated. However, I'm very new to this type of issue and i'm not familar with "mac filtering." Can you give me a brief description and how to use, or where to obtain this software/hardware/device?

    Thank you very much for your assistance!!!
  4. What router do you have?
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