Based on MAC addresses, user authentication can be performed when connecting through the Captive Portal. This is a very real problem, for example, using iSniff-GPS, you can track the previous geographic locations of devices.īut there is a more important reason (than paranoia) to learn about MAC addresses and about ways to spoof or prohibit changes in your system. So, in short, the spoofing of the MAC address is needed so that it is not possible to track and identify the device by its MAC address. is replaced with a fake one, and new MAC addresses are constantly generated for the same device. But the problem, apparently, is important, since in the new Android and iOS firmware, the MAC address is constantly spoofed, i.e. It is understandable for a hacker to want to hide his MAC address – to prevent the possibility of proving his identity with the person who carried out the attack, but why would ordinary users hide (spoof) their true MAC? For me personally, the answer to this question is not obvious. Moreover, the MAC address (also called the hardware, physical address) does not change when the operating system is changed (reinstalled, for example) – it is burned into the network interface. And since this network device is part of your computer, it allows you to uniquely identify your computer. So, since the MAC address must be unique, it allows you to uniquely identify the network device. By the way, a router or a switch has a unique MAC address for each port, if the device supports wireless networks, then each wireless interface (2.4 GHz and 5 GHz) also has its own MAC address. That is, when we talk about “changing the MAC address”, then you need to understand that there are several of these addresses. With desktop computers, the situation is usually the same. For example, laptops have at least two network interfaces: wired and Wi-Fi – each of them has a MAC address. By the way, if a device has several network interfaces, then each of them has its own MAC address.
The MAC address is (must be) unique for each network interface. In this article, we will look at how to change (spoof) the MAC address on your Linux computer, as well as how to disable automatic spoofing of the MAC address. About what a MAC address is and how to view it has already been discussed in the article “ How to find the MAC address and How to find the manufacturer by MAC address”.
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