Satellite L750D - MAC address change by itself

Satellite L750D/L755D 18mths old.
Restarted this morning after the weekend and cable NIC MAC address has chnaged.

Started in windows and could see a different value to Friday (as we control access through MAC address and was blocked).
Started in normal Linux (Ubuntu 12.04) and a different MAC address again.

NIC seems to work fine with whatever he chooses - but how MAC address can be change by itself?


> NIC seems to work fine with whatever he chooses - but how MAC address can be change by itself?

The physical MAC address is not editable, but there are a few ways to spoof the mac address
For example, using Windows XP, the MAC address can be changed in the properties of the Ethernet adapter. On the Advanced tab, under "MAC address", "Locally administered address", "Ethernet address" or "network address". The name of this option depends on the Lan driver that is installed on your laptop. And important note; not all drivers are supported changing the MAC address of this way.

In addition the system registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\ {4D36E972-E325-11CE-BFC1-08002BE10318} contains some parameters of the network interface and the option called NetworkAddress will serve to set the MAC address.

There are also tools that could spoof the address MAC for example, SMAC MAC Address Changer.
Finally and above all some routers provide an option to change the MAC address.

Tags: Toshiba

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