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I have a computer with a USB-to-WiFi adapter and and Ethernet port.

When I connect the PC to the wireless network I receive an IP and I'm able to ping it. However when I connect the Ethernet cable as well I'm not able to ping the IP of the wireless adapter any more.

What could be the problem?

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both wireless and wired network is in same subnet with same gateway? –  Kaveh Mar 7 '13 at 17:16
    
@Kaveh yes they are –  Maverik Mar 7 '13 at 17:25
    
IS it right? after plugged in Ethernet cable, you cannot ping your own USB wifi? –  Kaveh Mar 7 '13 at 19:24
    
@Kaveh I can ping the IP of the wifi adapter untill I plug in the ethernet cable. –  Maverik Mar 7 '13 at 19:51
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1 Answer

I suppose that you use Windows. Probably the firewall doesn't allow ping. Try to disable the firewall to check it.

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