Quote:
Originally Posted by Hamlet53
... to make Internet connection the proper password must be entered and as well as the router is set up to allow connection only from the list of MAC addresses that correspond to the cards in my devices.
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Sorry to quote only part of your message but this is the important part.
The pass phrase (it should not be word) is what protects your network. The MAC filtering offers no protection at all. If I am able to crack your pass phrase then I can get onto your network by using one of the authorized MAC addresses. The authorized MAC addresses are broadcast anytime a legitimate client device sends or receives a packet on your network. In practical tests it takes longer for you to configure a MAC address in your router then it takes someone to set that MAC address on their PC/other device.
To crack your pass phrase I need to capture the WPA/WPA2 authentication frames between your device and your router when it first connects to the network. I can then run my crack program offline and if I get your pass phrase I clone the MAC address of a legitimate station and authenticate to your router as if I was the legitimate device. If I am able to do this depends entirely on the quality of your pass phrase.
You would be surprised at the number of routers which have the factory default pass phrase or something like "123456" or a word which is easy to guess.
All of which goes to show your IP address cannot be used to prove anything. Even if you do not have wireless there are ways for someone to steal your IP address if they want to do so.