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My MacBook is connected to an Internet cable and meanwhile sharing the Internet connection with other devices over Wi-Fi. That is, my MacBook serves as a router, which broadcasts Wi-Fi signals.

Since essentially, all the Internet packets travel through my MacBook, there must be a way whereby I can monitor which device is viewing what contents using my hot spot.

Is there a software (preferably free) or some built-in block that allows me to achieve this?

  • To downvoters: indicate your reasons, please. – Sibbs Gambling Sep 16 '14 at 7:30
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I would suggest using Wireshark. This has a GUI to allow you to specify all sorts of filters, even down to the ports/protocols being used - or by MAC address or IP address.

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You might want to look at the terminal command tcpdump as it will show all the traffic passing over your network. You have to run it via sudo but it should give you what you want.

sudo tcpdump -vv -i en0

Should show everything over your ethernet port.

  • Thanks a lot! It really shows me a lot, but maybe too much. Is it possible to just show "skimmed" info.? Like, which MAC address visits which IP address. That would suffice for me. e.g., Device1'sMACAddress 124.63.24.1 – Sibbs Gambling Sep 16 '14 at 7:31
  • Take a look at the man page for it there are a fair number of flags that can change what information is being delivered. Or pipe it through a sed to grab the info you are looking for – Paul Gilfedder Sep 16 '14 at 7:33
  • also there are some tools to help... zdnet.com/… – Paul Gilfedder Sep 16 '14 at 7:36

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