Quote:
Originally Posted by Hamlet53
Interesting. Forgive my ignorance on some of this, but for my home Internet connection I have a wired connection between my wireless router/modem. Then for the wireless devices I use in my home 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. I do leave my modem/router on all the time and so connected to the Internet. So to make unauthorized use of my connection someone would have to be within range of my modem, crack my password, and spoof one of the MAC addresses of my devices? Or is it worse than that?
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Again, that's on your private network (on the house side of your cable modem), on the street side is the public (cable company's) network, and they are the ones who assign your public IP, based on the MAC address of your cable modem. If I connect another cable modem that has the same MAC address anywhere within the cable company's network (actually subnet, but that's beyond this discussion) they will give it an IP address, and log it as being assigned to you.
The caveat is that if two modems with the same MAC log on at the same time the DHCP appliance is going to call foul and alert the cable company that someone is spoofing MACs. Depending on the DHCP appliance manufacturer, it may or may not refuse to assign an IP.