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Is there a way I could detect this situation?
– Jason
Commented Dec 14, 2011 at 16:44
I don't know if you can see the "unwanted" trafic from your desktop with a sniffer, I mean, as far i know, the ethernet frames are discarted on your ethernet adapter(phisical OSI layer). However, you could try to install a sniffer(such as Wireshark) and analyze if you are receiving frames that dont maches with your ethernet MAC. Another and easyer way to test is using a switch(insted your hub) and check if the same problem happend again.
– Diogo
Commented Dec 14, 2011 at 16:49
1

Do the activity lights on the router give any indication of activity on the desktop's port? Also, brand/mode may help with identifying the type of hardware.
– Tevo D
Commented Dec 14, 2011 at 17:20

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