Originally Posted by JustThatDude
After you restart your computer your mac address is reverted back to your original. It can't be done PERMANENTLY
Ah yea, that was how it is. You had to use a proxy layer to mask it as something else. Forgot that, but true MAC address's is by design impossible to permanently change.
Originally Posted by gingerbread
Sorry about a slight off-topic.
There are millions of network device on this planet. I wonder if the unique MAC address could run out someday?
Well it could, the mac address is stored in an 48bit key (2^48= 281474976710656 unique addresses). Although, if I remember right, some of the hex numbers in the key describes what company that produced the NIC with that MAC address and some others describes at what factory it was produced. Perhaps some describes some sort of time stamp. Anyway, that reduces the amount of free MAC addresses alot(in a similar way IPv4 was limited in addresses, due to reserved IP ranges). Its unlikely it will run out soon though. I don't see a giant problem with it either. Yes, some problems will undoubtly happen, but imho MACaddresses is only REALLY used as a identifier on LAN, which are extremely extremely extremely small compared to the devices on the whole net... MAC sucks as authentication also, due to attacks such as ARP spoofing and mac address spoofing, so that would not be a big issue either... If anyone uses MAC for authentication on anything bigger than a LAN, they are imho retards. Ofc something would still had to be done, to ensure everyone can still have a unique identifier in LAN's though...